Trauma, PTSD, and the Developing Brain

May combine two claims.

Amygdala and other subcortical regions mature early (~age 5), while emotion regulatory regions such as dorsal/lateral PFC mature later (mid-20s).

“structural MRI studies show relatively early maturation of amygdala and other subcortical regions supporting threat reactivity (~age 5) [32], with much later maturation of emotion regulatory regions such as dorsal/lateral PFC (mid-20s) [31].”

• cites [31] Gogtay N, Giedd JN, Lusk L, Hayashi KM, Greenstein D, Vaituzis AC, et al. Dynamic mapping of human cortical development during childhood through early adulthood. Proc Natl Acad Sci U S A. 2004;101:8174–9. sourcePartly supported

  The [31] citation attaches to the later-maturing dorsal/lateral PFC claim, not the amygdala claim cited to [32]. The Results say dorsolateral prefrontal cortex loses gray matter only at the end of adolescence, but the Methods give a study age range of 4–21 years; the paper does not establish maturation in the mid-20s. (LLM, conf=0.91)

  Experimental — accuracy not yet measured
• cites [32] Uematsu A, Matsui M, Tanaka C, Takahashi T, Noguchi K, Suzuki M, et al. Developmental trajectories of amygdala and hippocampus from infancy to early adulthood in healthy individuals. PLoS One. 2012;7:e46970. sourceDisputed

  The Discussion reports rapid amygdala growth early in life, but says amygdala volume continues to increase after age 4 and peaks at 9–11 years—not around age 5. This verdict concerns the early-maturation claim cited to this paper; the later PFC claim has a separate citation. (LLM, conf=0.86)

  Checked by a reasoning model — may be wrong.

  Experimental — accuracy not yet measured

May combine two claims.

Functional brain meta-analyses in adult PTSD show hyperactivation of amygdala, insula, and midACC, but hypoactivation of dACC and medial/lateral prefrontal regions to threat-related stimuli.

“Functional brain meta-analyses in adult PTSD show hyperactivation of the amygdala, insula, and midACC, but hypoactivation of dACC and medial/lateral prefrontal regions particularly to threat-related stimuli [6–8].”

• cites [6] Etkin A, Wager TD. Functional neuroimaging of anxiety: a meta-analysis of emotional processing in PTSD, social anxiety disorder, and specific phobia. Am J Psychiatry. 2007;164:1476–88. sourcePartly supported

  The Results (Differences Between Anxiety Disorders; page not provided) support amygdala and insula hyperactivation and dorsal anterior cingulate and medial prefrontal hypoactivation in PTSD. But they list the mid-cingulate among regions with hypoactivation, not hyperactivation. The Discussion (Emotion Regulation, the Medial Prefrontal Cortex, and Anxiety Generalization; page not provided) does not establish lateral prefrontal hypoactivation, and the cited findings are not limited to threat-related stimuli. (LLM, conf=0.90)

  Experimental — accuracy not yet measured
• cites [7] Hayes JP, Hayes SM, Mikedis AM. Quantitative meta-analysis of neural activity in posttraumatic stress disorder. Biol Mood Anxiety Disord. 2012;2:9. sourcePartly supported

  The Abstract Results and Discussion report hyperactivation of the mid/dorsal ACC and, when ROI studies are included, the amygdala, alongside hypoactivation of medial and lateral prefrontal regions. The Limitations section reports anterior-insula activity only at a less stringent cluster threshold. Crucially, the Results for symptom-provocation studies show dACC hyperactivation, not the hypoactivation attributed to this source. (LLM, conf=0.90)

  Experimental — accuracy not yet measured
• cites [8] Patel R, Spreng RN, Shin LM, Girard TA. Neurocircuitry models of posttraumatic stress disorder and beyond: a meta-analysis of functional neuroimaging studies. Neurosci Biobehav Rev. 2012;36:2130–42. sourceNot checked — no full text of the source

May combine two claims.

Functional connectivity findings in adult PTSD are mixed, suggesting both greater and lower amygdala-mPFC connectivity to negative stimuli.

“Functional connectivity findings in adult PTSD have been mixed, suggesting both greater [11–13] and lower [14] amygdala-mPFC connectivity to negative stimuli.”

• cites [11] Fonzo GA, Simmons AN, Thorp SR, Norman SB, Paulus MP, Stein MB. Exaggerated and disconnected insular-amygdalar blood oxygenation level-dependent response to threat-related emotional faces in women with intimate-partner violence posttraumatic stress disorder. Biol Psychiatry. 2010;68:433–41. sourcePartly supported

  The Discussion reports attenuated connectivity among the dACC, anterior insula, and amygdalae while women with IPV-related PTSD processed fearful faces, supporting the citation’s lower-connectivity side. But the Results (Functional Connectivity for Matching to a Fearful Relative to Happy Target Face; page unavailable) do not report lower direct amygdala–mPFC connectivity: they report stronger connectivity between the right amygdala and sgACC, alongside weaker connections involving the insula. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [12] Gilboa A, Shalev AY, Laor L, Lester H, Louzoun Y, Chisin R, et al. Functional connectivity of the prefrontal cortex and the amygdala in posttraumatic stress disorder. Biol Psychiatry. 2004;55:263–72. sourceNot checked — no full text of the source
• cites [13] St Jacques PL, Botzung A, Miles A, Rubin DC. Functional neuroimaging of emotionally intense autobiographical memories in post-traumatic stress disorder. J Psychiatr Res. 2011;45:630–7. sourceSupported
• cites [14] Stevens JS, Jovanovic T, Fani N, Ely TD, Glover EM, Bradley B, et al. Disrupted amygdala-prefrontal functional connectivity in civilian women with posttraumatic stress disorder. J Psychiatr Res. 2013;47:1469–78. sourceSupported

May combine two claims.

In typically developing youth, emotional reactivity to negative content declines and regulatory capacity increases with age.

“Prevailing models of emotional development posit that emotional reactivity to negative content declines, while regulatory capacity increases with age in typically developing (TD) youth [18,19].”

• cites [18] Somerville LH, Jones RM, Casey BJ. A time of change: behavioral and neural correlates of adolescent sensitivity to appetitive and aversive environmental cues. Brain Cogn. 2010;72:124–33. sourcePartly supported

  In “Brain mechanisms of reduced top-down control over responses to salient cues in adolescents” (page unavailable), the paper describes regulatory prefrontal maturation with age and less regulatory control in adolescents than adults. But it describes emotional reactivity as peaking during adolescence, with adolescents showing greater responses to emotional cues than both children and adults. That does not support a general decline in reactivity with age across typically developing youth. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [19] Casey B, Galván A, Somerville LH. Beyond simple models of adolescence to an integrated circuit-based account: a commentary. Developmental Cognitive Neuroscience. 2016;17:128–30. sourcePartly supported

  The opening section describes increasing self-control with development, and the circuit discussion says strengthened prefrontal connectivity can diminish emotive responses. But the paper does not establish that reactivity specifically to negative content declines with age in typically developing youth; it cautions against treating emotional circuitry as strictly valence-specific. The indexed passages provide no page numbers. (LLM, conf=0.84)

  Experimental — accuracy not yet measured

May combine two claims.

In TD youth, amygdala reactivity to negative faces and images decreases with age, accompanied by greater structural and functional connectivity between amygdala and mPFC/rACC.

“amygdala reactivity to negative faces and images decreases with age [21,33–36], and is accompanied by greater structural and functional connectivity between the amygdala and mPFC/rACC [25,33,34,36].”

• cites [21] Silvers JA, Insel C, Powers A, Franz P, Helion C, Martin R, et al. The transition from childhood to adolescence is marked by a general decrease in amygdala reactivity and an affect-specific ventral-to-dorsal shift in medial prefrontal recruitment. Dev Cogn Neurosci. 2017;25:128–37. sourcePartly supported

  The Results (Imaging results; page not provided) report that amygdala responses to aversive and neutral images decreased with age through adolescence. The Introduction also describes prior findings for fearful faces, although this study did not use facial stimuli. The paper discusses developmental amygdala–prefrontal connectivity in general terms but does not establish the claimed increase in structural and functional connectivity with mPFC/rACC. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [33] Gee DG, Humphreys KL, Flannery J, Goff B, Telzer EH, Shapiro M, et al. A developmental shift from positive to negative connectivity in human amygdala-prefrontal circuitry. J Neurosci. 2013;33:4584–93. sourcePartly supported

  The Results sections report that amygdala reactivity to fearful faces decreased with age and that amygdala–mPFC functional connectivity shifted from positive to more negative across development. The Discussion says the reactivity and connectivity changes were independent. The paper does not establish the broader claim about negative images, greater structural connectivity, or rACC connectivity. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [34] Vink M, Derks JM, Hoogendam JM, Hillegers M, Kahn RS. Functional differences in emotion processing during adolescence and early adulthood. NeuroImage. 2014;91:70–6. sourceNot checked — no full text of the source
• cites [35] • Keding TJ, Herringa RJ. Paradoxical prefrontal-amygdala recruitment to angry and happy expressions in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:2903–12. Functional MRI study showing cross-sectional increases in amygdala reactivity with age in pediatric PTSD. sourcePartly supported

  The Regional Brain Activation results (page unavailable) report that amygdala activation decreased with age in healthy youth, but the finding was across angry and happy face conditions, not specifically negative stimuli. The Functional Connectivity results describe responses to angry versus happy faces, not age-related increases in connectivity; the paper does not report structural connectivity or responses to negative images in these healthy youth. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [36] Swartz JR, Carrasco M, Wiggins JL, Thomason ME, Monk CS. Age-related changes in the structure and function of prefrontal cortex-amygdala circuitry in children and adolescents: a multi-modal imaging approach. NeuroImage. 2014;86:212–20. sourcePartly supported

  The Results (§3.1; page unavailable) report decreasing amygdala activation to faces with age and increasing uncinate fasciculus FA, a measure of structural connectivity. The Introduction (§1; page unavailable) describes prior evidence of stronger negative amygdala–rACC functional connectivity with age, but this study found no significant age-related change in functional connectivity. The passages concern faces, not other negative images. (LLM, conf=0.88)

  Experimental — accuracy not yet measured

May combine two claims.

Youth with PTSD exhibit reduced coupling between amygdala and rACC/dmPFC, which is linked to PTSD severity.

“we found that youth with PTSD exhibit reduced coupling between the amygdala and rACC/dmPFC, which was further linked to PTSD severity [35,57].”

• cites [35] • Keding TJ, Herringa RJ. Paradoxical prefrontal-amygdala recruitment to angry and happy expressions in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:2903–12. Functional MRI study showing cross-sectional increases in amygdala reactivity with age in pediatric PTSD. sourcePartly supported

  The Functional Connectivity section reports reduced amygdala–dmPFC connectivity in youth with PTSD for angry faces, but increased connectivity for happy faces. It links this connectivity to hyperarousal symptoms, although the negative correlation for angry faces was only a trend. The passages do not establish reduced amygdala–rACC coupling; rACC connectivity results are said to be in supplementary material. (LLM, conf=0.87)

  Experimental — accuracy not yet measured
• cites [57] • Wolf RC, Herringa RJ. Prefrontal-amygdala dysregulation to threat in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:822–31. Functional MRI study showing cross-sectional decreases in amygdala-vmPFC coupling with age in pediatric PTSD. sourceSupported

May combine two claims.

Amygdala activation is lower in PTSD compared to TD youth at younger ages (<15 years), but hyperactive by late adolescence.

“amygdala activation was actually lower in PTSD compared to TD youth at younger ages (<15 years), but showed hyperactivation by late adolescence.”

• cites [35] • Keding TJ, Herringa RJ. Paradoxical prefrontal-amygdala recruitment to angry and happy expressions in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:2903–12. Functional MRI study showing cross-sectional increases in amygdala reactivity with age in pediatric PTSD. sourcePartly supported

  The Regional Brain Activation results report that right-amygdala activation decreased with age in healthy youth but increased with age in youth with PTSD; the Discussion describes the same pattern. Our copy does not establish the claimed below-15 cutoff or explicitly report lower activation in the younger PTSD group and hyperactivation relative to controls by late adolescence. (LLM, conf=0.83)

  Experimental — accuracy not yet measured

• AssumptionRests on an assumption: Cross-sectional age-related differences in brain measures reflect developmental changes over time.

Classified as probably not a substantial claim.

dACC is hypoactive in adult PTSD.

“the dACC is hypoactive in adult PTSD [58].”

• cites [58] Cisler JM, Scott Steele J, Smitherman S, Lenow JK, Kilts CD. Neural processing correlates of assaultive violence exposure and PTSD symptoms during implicit threat processing: a network-level analysis among adolescent girls. Psychiatry Res. 2013;214:238–46. sourcePartly supported

  The Introduction (page unavailable) says adult PTSD studies suggest altered functional activity in the dorsal ACC, but it does not say that activity is reduced. The paper’s Results concern network activity and connectivity in adolescent girls, not dACC hypoactivity in adults. (LLM, conf=0.84)

  Experimental — accuracy not yet measured

May combine two claims.

In pediatric PTSD, there are age-related abnormalities in amygdala-PFC coupling: TD youth show increased amygdala-vmPFC coupling to negative images with age, while youth with PTSD show decreased coupling with age.

“we have shown that while TD youth exhibit increased amygdala-vmPFC coupling to negative images with age, youth with PTSD show decreased coupling with age [57].”

• cites [57] • Wolf RC, Herringa RJ. Prefrontal-amygdala dysregulation to threat in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:822–31. Functional MRI study showing cross-sectional decreases in amygdala-vmPFC coupling with age in pediatric PTSD. sourceSupported

• AssumptionRests on an assumption: Cross-sectional age-related differences in brain measures reflect developmental changes over time.

May combine two claims.

Pediatric PTSD is associated with a failure to upregulate prefrontal circuits and increasing amygdala reactivity with age.

“recent neuroimaging studies of pediatric PTSD suggest a failure to upregulate prefrontal circuits, but nevertheless show increasing amygdala reactivity with age.”

• cites [35] • Keding TJ, Herringa RJ. Paradoxical prefrontal-amygdala recruitment to angry and happy expressions in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:2903–12. Functional MRI study showing cross-sectional increases in amygdala reactivity with age in pediatric PTSD. sourcePartly supported

  The Discussion reports increasing amygdala activation with age in youth with PTSD. It also reports decreased recruitment of prefrontal emotion-regulatory circuits to angry faces, but heightened recruitment to happy faces. Thus, a general failure to upregulate prefrontal circuits omits an important condition-specific finding. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [57] • Wolf RC, Herringa RJ. Prefrontal-amygdala dysregulation to threat in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:822–31. Functional MRI study showing cross-sectional decreases in amygdala-vmPFC coupling with age in pediatric PTSD. sourcePartly supported

  The Abstract and Regional Brain Activation results report that dmPFC activation increased with age in healthy youth but decreased with age in youth with PTSD, supporting the prefrontal part of the claim. The Results report no group-by-age effect in amygdala activation; increasing amygdala reactivity with age was a prediction in the Introduction, not a finding. (LLM, conf=0.90)

  Experimental — accuracy not yet measured

May combine two claims.

Younger youth with PTSD (<15 years) show greater amygdala-vmPFC coupling compared to TD youth, with reverse pattern by late adolescence.

“younger youth with PTSD (<15 years) actually show greater amygdala-vmPFC coupling compared to TD youth, with the reverse pattern by late adolescence.”

• cites [57] • Wolf RC, Herringa RJ. Prefrontal-amygdala dysregulation to threat in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:822–31. Functional MRI study showing cross-sectional decreases in amygdala-vmPFC coupling with age in pediatric PTSD. sourcePartly supported

  The Results section reports that amygdala–vmPFC connectivity increased with age in healthy youth but decreased with age in youth with PTSD. The Discussion describes greater connectivity in younger PTSD youth and lower connectivity in older PTSD youth, supporting the reversal, but our copy does not specify a cutoff of <15 years (pages unavailable). (LLM, conf=0.85)

  Experimental — accuracy not yet measured

• AssumptionRests on an assumption: Cross-sectional age-related differences in brain measures reflect developmental changes over time.

May combine two claims.

On voluntary emotion regulation tasks, TD youth show greater amygdala downregulation, increased lPFC recruitment, and increased amygdala-lPFC coupling with age.

“On voluntary emotion regulation (reappraisal) tasks, TD youth show greater amygdala downregulation [28–30], increased lateral (l)PFC recruitment, and increased amygdala-lPFC coupling [26,28] with age.”

• cites [26] McRae K, Gross JJ, Weber J, Robertson ER, Sokol-Hessner P, Ray RD, et al. The development of emotion regulation: an fMRI study of cognitive reappraisal in children, adolescents and young adults. Soc Cogn Affect Neurosci. 2012;7:11–22. sourcePartly supported

  The Linear effects of age section (page unavailable) reports increased left ventrolateral PFC activation with age during reappraisal, supporting the lPFC portion. It reports no age-related amygdala difference, and the Neural responses section (page unavailable) found no amygdala downregulation during reappraisal even across all participants. The copy does not report age-related amygdala–lPFC coupling. (LLM, conf=0.90)

  Experimental — accuracy not yet measured
• cites [28] Silvers JA, Shu J, Hubbard AD, Weber J, Ochsner KN. Concurrent and lasting effects of emotion regulation on amygdala response in adolescence and young adulthood. Dev Sci. 2015;18:771–84. sourcePartly supported

  The Discussion reports greater amygdala downregulation and stronger inverse amygdala–rostrolateral PFC connectivity with age during active reappraisal. The Results (Imaging results) found no age-related increase in prefrontal recruitment during active regulation; greater rostrolateral PFC recruitment was associated with age only when participants later viewed previously reappraised images. Page numbers were not available in our copy. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [29] Pitskel NB, Bolling DZ, Kaiser MD, Crowley MJ, Pelphrey KA. How grossed out are you? The neural bases of emotion regulation from childhood to adolescence. Dev Cogn Neurosci. 2011;1:324–37. sourcePartly supported

  The Discussion (§4.2.4; page unavailable) reports decreasing left-amygdala activation with age during down-regulation, consistent with the amygdala part of the claim. It reports decreasing, not increasing, prefrontal activation with age in that condition. The Discussion (§4.2; page unavailable) describes an amygdala–ventromedial PFC relationship, but does not establish increasing amygdala–lateral PFC coupling with age. (LLM, conf=0.87)

  Experimental — accuracy not yet measured
• cites [30] Stephanou K, Davey CG, Kerestes R, Whittle S, Pujol J, Yücel M, et al. Brain functional correlates of emotion regulation across adolescence and young adulthood. Hum Brain Mapp. 2016;37:7–19. sourcePartly supported

  The fMRI Analyses section reports that older participants showed greater right-amygdala downregulation during reappraisal. The paper does not find increasing lateral PFC recruitment with age in its own sample, and its PPI Analysis reports no significant age-related change in amygdala–left dlPFC connectivity. Those two parts of the claim are not supported by this study. (LLM, conf=0.90)

  Experimental — accuracy not yet measured

May combine two claims.

Childhood trauma and adversity are associated with increased amygdala reactivity to negative stimuli and decreased resting functional coupling between amygdala and vmPFC.

“childhood trauma and adversity are associated with increased amygdala reactivity particularly to negative stimuli (e.g. [38–47]) as well as decreased resting functional coupling between the amygdala and vmPFC [48,49].”

• cites [38] Garrett AS, Carrion V, Kletter H, Karchemskiy A, Weems CF, Reiss A. Brain activation to facial expressions in youth with PTSD symptoms. Depress Anxiety. 2012;29:449–59. sourceSupported
• cites [39] McCrory EJ, De Brito SA, Sebastian CL, Mechelli A, Bird G, Kelly PA, et al. Heightened neural reactivity to threat in child victims of family violence. Curr Biol. 2011;21:R947–8. sourceNot checked — no full text of the source
• cites [40] • McLaughlin KA, Peverill M, Gold AL, Alves S, Sheridan MA. Child maltreatment and neural systems underlying emotion regulation. J Am Acad Child Adolesc Psychiatry. 2015;54:753–62. Functional MRI study showing compensatory prefrontal recruitment during emotion regulation in maltreated adolescents when adjusting for psychiatric symptoms. sourceNot checked — no full text of the source
• cites [41] Dannlowski U, Stuhrmann A, Beutelmann V, Zwanzger P, Lenzen T, Grotegerd D, et al. Limbic scars: long-term consequences of childhood maltreatment revealed by functional and structural magnetic resonance imaging. Biol Psychiatry. 2012;71:286–93. sourceNot checked — no full text of the source
• cites [42] Dannlowski U, Kugel H, Huber F, Stuhrmann A, Redlich R, Grotegerd D, et al. Childhood maltreatment is associated with an automatic negative emotion processing bias in the amygdala. Hum Brain Mapp. 2013;34:2899–909. sourceSupported
• cites [43] Suzuki H, Luby JL, Botteron KN, Dietrich R, McAvoy MP, Barch DM. Early life stress and trauma and enhanced limbic activation to emotionally valenced faces in depressed and healthy children. J Am Acad Child Adolesc Psychiatry. 2014;53:800–13. e10 sourceNot checked — no full text of the source
• cites [44] Malter Cohen M, Jing D, Yang RR, Tottenham N, Lee FS, Casey BJ. Early-life stress has persistent effects on amygdala function and development in mice and humans. Proc Natl Acad Sci U S A. 2013;110:18274–8. sourceSupported
• cites [45] • Herringa RJ, Burghy CA, Stodola DE, Fox ME, Davidson RJ, Essex MJ. Enhanced prefrontal-amygdala connectivity following childhood adversity as a protective mechanism against internalizing in adolescence. Biol Psychiatry Cogn Neurosci Neuroimaging. 2016;1:326–34. Functional MRI study in a longitudinal community sample of adolescents implicating enhanced amygdala-prefrontal coupling as a mechanism of stress resilience. sourcePartly supported

  The Introduction (page unavailable) reports prior work linking childhood adversity to decreased intrinsic mPFC–amygdala connectivity, supporting the resting-coupling portion of the claim. It does not specify the ventromedial PFC, and this paper’s Results instead concern connectivity during an emotion-processing task. The increased-reactivity clause has separate citations in the citing sentence and is not attributed to this source. (LLM, conf=0.84)

  Experimental — accuracy not yet measured
• cites [46] Marusak HA, Martin KR, Etkin A, Thomason ME. Childhood trauma exposure disrupts the automatic regulation of emotional processing. Neuropsychopharmacology. 2015;40:1250–8. sourcePartly supported

  The Discussion (page unavailable) reports greater amygdala reactivity to emotional conflict in trauma-exposed youth, supporting this paper’s apparent role in the first citation group. It does not establish that the increase is particularly to negative stimuli. The resting-coupling clause has a separate citation group; this study measured amygdala–pgACC coupling during a task, not at rest. (LLM, conf=0.82)

  Experimental — accuracy not yet measured
• cites [47] Hein TC, Monk CS. Research review: neural response to threat in children, adolescents, and adults after child maltreatment—a quantitative meta-analysis. J Child Psychol Psychiatr. 2017;58:222–30. sourceSupported

May combine two claims.

In pediatric PTSD, there is a group by age interaction on amygdala activation to angry and happy faces: TD youth show decreased activation with age, while youth with PTSD show increased activation with age.

“we found a group by age interaction on amygdala activation to both angry and happy faces. Specifically, TD youth showed the expected pattern of decreased amygdala activation with age, while youth with PTSD showed increased activation with age [35].”

• cites [35] • Keding TJ, Herringa RJ. Paradoxical prefrontal-amygdala recruitment to angry and happy expressions in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:2903–12. Functional MRI study showing cross-sectional increases in amygdala reactivity with age in pediatric PTSD. sourceSupported

• AssumptionRests on an assumption: Cross-sectional age-related differences in brain measures reflect developmental changes over time.

May combine two claims.

Childhood trauma may influence the development of threat processing and emotion regulatory systems, contributing risk for affective disorders.

“Many studies now suggest that childhood trauma may influence the development of threat processing and emotion regulatory systems, contributing risk for the emergence of affective disorders.”

• cites [37] Paquola C, Bennett MR, Lagopoulos J. Understanding heterogeneity in grey matter research of adults with childhood maltreatment—a meta-analysis and review. Neurosci Biobehav Rev. 2016;69:299–312. sourceNot checked — no full text of the source
• cites [38] Garrett AS, Carrion V, Kletter H, Karchemskiy A, Weems CF, Reiss A. Brain activation to facial expressions in youth with PTSD symptoms. Depress Anxiety. 2012;29:449–59. sourcePartly supported

  The Discussion (page not provided) reports altered activation in emotion-processing circuitry in youth with interpersonal trauma and PTSD symptoms, and suggests traumatic stress may affect the development of regions important for emotion perception. The Introduction also describes altered processing of threatening stimuli. The paper does not establish that these changes increase the risk of later affective disorders. (LLM, conf=0.84)

  Experimental — accuracy not yet measured
• cites [39] McCrory EJ, De Brito SA, Sebastian CL, Mechelli A, Bird G, Kelly PA, et al. Heightened neural reactivity to threat in child victims of family violence. Curr Biol. 2011;21:R947–8. sourceNot checked — no full text of the source
• cites [40] • McLaughlin KA, Peverill M, Gold AL, Alves S, Sheridan MA. Child maltreatment and neural systems underlying emotion regulation. J Am Acad Child Adolesc Psychiatry. 2015;54:753–62. Functional MRI study showing compensatory prefrontal recruitment during emotion regulation in maltreated adolescents when adjusting for psychiatric symptoms. sourceNot checked — no full text of the source
• cites [41] Dannlowski U, Stuhrmann A, Beutelmann V, Zwanzger P, Lenzen T, Grotegerd D, et al. Limbic scars: long-term consequences of childhood maltreatment revealed by functional and structural magnetic resonance imaging. Biol Psychiatry. 2012;71:286–93. sourceNot checked — no full text of the source
• cites [42] Dannlowski U, Kugel H, Huber F, Stuhrmann A, Redlich R, Grotegerd D, et al. Childhood maltreatment is associated with an automatic negative emotion processing bias in the amygdala. Hum Brain Mapp. 2013;34:2899–909. sourcePartly supported

  The Discussion (around pp. 2904–2905) links childhood maltreatment to heightened amygdala responses to negative or threatening faces and suggests this may be a vulnerability factor for depression and other psychiatric disorders. It does not establish an effect on the development of emotion-regulatory systems; the study measured amygdala responses in healthy adults, not developmental change. (LLM, conf=0.83)

  Experimental — accuracy not yet measured
• cites [43] Suzuki H, Luby JL, Botteron KN, Dietrich R, McAvoy MP, Barch DM. Early life stress and trauma and enhanced limbic activation to emotionally valenced faces in depressed and healthy children. J Am Acad Child Adolesc Psychiatry. 2014;53:800–13. e10 sourceNot checked — no full text of the source
• cites [44] Malter Cohen M, Jing D, Yang RR, Tottenham N, Lee FS, Casey BJ. Early-life stress has persistent effects on amygdala function and development in mice and humans. Proc Natl Acad Sci U S A. 2013;110:18274–8. sourceSupported
• cites [45] • Herringa RJ, Burghy CA, Stodola DE, Fox ME, Davidson RJ, Essex MJ. Enhanced prefrontal-amygdala connectivity following childhood adversity as a protective mechanism against internalizing in adolescence. Biol Psychiatry Cogn Neurosci Neuroimaging. 2016;1:326–34. Functional MRI study in a longitudinal community sample of adolescents implicating enhanced amygdala-prefrontal coupling as a mechanism of stress resilience. sourceSupported
• cites [46] Marusak HA, Martin KR, Etkin A, Thomason ME. Childhood trauma exposure disrupts the automatic regulation of emotional processing. Neuropsychopharmacology. 2015;40:1250–8. sourceSupported

May combine two claims.

Amygdala hyperactivation has been reported in only one study of pediatric PTSD, with no difference in three others.

“amygdala hyperactivation has been reported in only one study of pediatric PTSD [38], with no difference (negative studies) in three others [55–57].”

• cites [38] Garrett AS, Carrion V, Kletter H, Karchemskiy A, Weems CF, Reiss A. Brain activation to facial expressions in youth with PTSD symptoms. Depress Anxiety. 2012;29:449–59. sourcePartly supported

  The Discussion reports exaggerated right-amygdala activation in youth with posttraumatic stress symptoms (PTSS), supporting the cited example of hyperactivation. But it describes this group as having significant subsyndromal symptoms, so the finding does not establish hyperactivation in youth diagnosed with PTSD. This source also does not establish the claim that it was the only positive study. (LLM, conf=0.82)

  Experimental — accuracy not yet measured
• cites [55] Crozier JC, Wang L, Huettel SA, De Bellis MD. Neural correlates of cognitive and affective processing in maltreated youth with posttraumatic stress symptoms: does gender matter? Dev Psychopathol. 2014;26:491–513. sourceNot checked — no full text of the source
• cites [56] Yang P, Wu M-T, Hsu C-C, Ker J-H. Evidence of early neurobiological alternations in adolescents with posttraumatic stress disorder: a functional MRI study. Neurosci Lett. 2004;370:13–8. sourceNot checked — no full text of the source
• cites [57] • Wolf RC, Herringa RJ. Prefrontal-amygdala dysregulation to threat in pediatric posttraumatic stress disorder. Neuropsychopharmacology. 2016;41:822–31. Functional MRI study showing cross-sectional decreases in amygdala-vmPFC coupling with age in pediatric PTSD. sourceSupported

May combine two claims.

In contrast to adult PTSD, youth with PTSD showed increased connectivity within DMN, combined with greater anti-correlation between DMN and CEN/SN.

“In contrast to findings in adult PTSD, youth with PTSD showed increased connectivity within the DMN, combined with greater anti-correlation between the DMN and CEN/SN.”

• cites [69] • Patriat R, Birn RM, Keding TJ, Herringa RJ. Default-mode network abnormalities in pediatric posttraumatic stress disorder. J Am Acad Child Adolesc Psychiatry. 2016;55:319–27. Functional MRI study of pediatric PTSD examining large scale intrinsic brain networks. sourcePartly supported

  The Results (Seed-Based Analysis) report increased within-DMN connectivity in youth with PTSD, and the Results (Independent Component Analysis) report greater DMN–task-positive network anti-correlation. The Discussion identifies salience and attention-network nodes in that task-positive network. The paper does not identify or separately test a central executive network (CEN), so that specific label is not established by our copy; no page numbers are available. (LLM, conf=0.82)

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S3 (load-bearing).

DSM-5 introduced the dissociative subtype of PTSD.

“DSM-5 introduced the dissociative subtype of PTSD [62]”

• cites [62] American Psychiatric Association. Diagnostic and statistical manual of mental disorders: DSM-5. 5th ed. Washington, D.C: American Psychiatric Association; 2013. sourceCould not verify

  The indexed passages labeled 11 September 2026 discuss depression, not PTSD or DSM-5 diagnostic subtypes. Searches for the dissociative subtype and related terms returned no passage addressing whether DSM-5 introduced it; the available copy therefore cannot verify the claim. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

May combine two claims.

Studies of chronic stress or glucocorticoid exposure in adult animals show effects on frontolimbic circuitry including dendritic atrophy of mPFC and hippocampus, and expansion of basolateral amygdala.

“Studies of chronic stress or glucocorticoid exposure in adult animals show notable effects on frontolimbic circuitry including dendritic atrophy of the mPFC and hippocampus, and expansion of the basolateral amygdala [71].”

• cites [71] McEwen BS, Nasca C, Gray JD. Stress effects on neuronal structure: hippocampus, amygdala, and prefrontal cortex. Neuropsychopharmacology. 2016;41:3–23. sourceSupported

Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

DSM-5 introduced the preschool (<6 years) subtype of PTSD, which requires fewer symptoms of avoidance and negative cognitions.

“the DSM-5 introduced the preschool (< 6 years) subtype of PTSD, which requires fewer symptoms of avoidance and negative cognitions to meet the diagnostic threshold (1 avoidance and 2 cognition for adults compared to 1 avoidance or cognition for preschoolers) [62].”

• cites [62] American Psychiatric Association. Diagnostic and statistical manual of mental disorders: DSM-5. 5th ed. Washington, D.C: American Psychiatric Association; 2013. sourceCould not verify

  The supplied passages, labeled 11 September 2026, discuss depression rather than PTSD diagnostic criteria. Searches for the preschool PTSD subtype and the adult-versus-preschool symptom thresholds returned no relevant passage, so this claim cannot be checked against our copy. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

Classified as probably not a substantial claim.

Lanius and colleagues proposed a model of heightened prefrontal recruitment with dampening of amygdala-based threat responding in dissociative PTSD.

“Lanius and colleagues have proposed a model of heightened prefrontal recruitment with associated dampening of amygdala-based threat responding [64].”

• cites [64] Lanius RA, Vermetten E, Loewenstein RJ, Brand B, Schmahl C, Bremner JD, et al. Emotion modulation in PTSD: clinical and neurobiological evidence for a dissociative subtype. Am J Psychiatry. 2010;167:640–7. sourceSupported

May combine two claims.

Initial studies suggest ELS decreases hippocampal neuron proliferation, increases turnover of cortical dendritic spines, and increases amygdala volume and reactivity.

“initial studies suggest that ELS decreases hippocampal neuron proliferation [72], increases turnover of cortical dendritic spines [73], and increases amygdala volume [74] and reactivity [44].”

• cites [72] Tanapat P, Galea LAM, Gould E. Stress inhibits the proliferation of granule cell precursors in the developing dentate gyrus. Int J Dev Neurosci. 1998;16:235–9. sourceNot checked — no full text of the source
• cites [73] Liston C, Gan W-B. Glucocorticoids are critical regulators of dendritic spine development and plasticity in vivo. PNAS. 2011;108:16074–9. sourcePartly supported

  The Results (page not provided) report increased cortical dendritic-spine formation and elimination after corticosterone treatment in adolescent mice. The citation is attached only to the spine-turnover clause, not the other findings in the sentence. The study did not test early-life stress itself, so it supports increased turnover after glucocorticoid exposure but not the claim that ELS causes it. (LLM, conf=0.88)

  Experimental — accuracy not yet measured
• cites [74] Howell BR, Grand AP, McCormack KM, Shi Y, LaPrarie JL, Maestripieri D, et al. Early adverse experience increases emotional reactivity in juvenile rhesus macaques: relation to amygdala volume. Dev Psychobiol. 2014;56:1735–46. sourcePartly supported

  The Discussion reports heightened, context-dependent emotional responses in juvenile macaques exposed to early abuse. But the citation is attached to “amygdala … reactivity”: the paper measured behavior and amygdala volume, not amygdala activity, so it does not establish increased reactivity of the amygdala itself. The hippocampal, dendritic-spine, and amygdala-volume claims carry other citations. (LLM, conf=0.84)

  Experimental — accuracy not yet measured
• cites [44] Malter Cohen M, Jing D, Yang RR, Tottenham N, Lee FS, Casey BJ. Early-life stress has persistent effects on amygdala function and development in mice and humans. Proc Natl Acad Sci U S A. 2013;110:18274–8. sourceSupported

Classified as probably not a substantial claim. May combine two claims.

This subtype was introduced given evidence that PTSD is underdiagnosed in younger children using adult criteria, and could reflect immaturity in systems underlying appraisal and reporting of negative emotion.

“This subtype was introduced given evidence that PTSD is underdiagnosed in younger children using adult criteria, and could reflect immaturity in systems underlying appraisal and reporting of negative emotion.”

• cites [62] American Psychiatric Association. Diagnostic and statistical manual of mental disorders: DSM-5. 5th ed. Washington, D.C: American Psychiatric Association; 2013. sourceCould not verify

  The passages labeled 11 September 2026 discuss depression, not the introduction of a PTSD subtype for younger children. Searches for underdiagnosis using adult criteria and for immature appraisal or reporting of negative emotion found no passage addressing either point. The supplied copy appears to contain unrelated WHO material, so it cannot verify the claim about the cited manual. (LLM, conf=0.76)

  Experimental — accuracy not yet measured

Probably not a substantial claim: may not pass S3 (load-bearing).

Early data in adults suggest potential neurobiological differences in dissociative PTSD.

“early data in adults suggest potential neurobiological differences in dissociative PTSD [63].”

• cites [63] • Krause-Utz A, Frost R, Winter D, Elzinga BM. Dissociation and alterations in brain function and structure: implications for borderline personality disorder. Curr Psychiatry Rep. 2017;19:6. Review of neuroimaging studies implicating potential brain substrates of dissociative symptoms. sourceSupported

May combine two claims.

Low internalizing adolescents showed adversity-related increases in prefrontal-amygdala coupling, while high internalizing adolescents did not.

“low internalizing adolescents showed adversity-related increases in prefrontal-amygdala coupling, while high internalizing adolescents did not.”

• cites [45] • Herringa RJ, Burghy CA, Stodola DE, Fox ME, Davidson RJ, Essex MJ. Enhanced prefrontal-amygdala connectivity following childhood adversity as a protective mechanism against internalizing in adolescence. Biol Psychiatry Cogn Neurosci Neuroimaging. 2016;1:326–34. Functional MRI study in a longitudinal community sample of adolescents implicating enhanced amygdala-prefrontal coupling as a mechanism of stress resilience. sourceSupported

May combine two claims.

Several studies have shown ELS is associated with GR hypermethylation in youth, though findings for FKBP5 are mixed.

“several studies have now shown that ELS is associated with GR hypermethylation in youth, though findings for FKBP5 have so far been mixed [79].”

• cites [79] Tyrka AR, Ridout KK, Parade SH. Childhood adversity and epigenetic regulation of glucocorticoid signaling genes: associations in children and adults. Dev Psychopathol. 2016;28:1319–31. sourceSupported

May combine two claims.

ELS is associated with hypermethylation of NR3C1 in exon 1F, which is associated with downregulation of GR in brain and periphery.

“In the case of NR3C1, ELS is associated with hypermethylation particularly in exon 1F, which in turn is associated with downregulation of GR in the brain and periphery [80,81].”

• cites [80] Turecki G, Meaney MJ. Effects of the social environment and stress on glucocorticoid receptor gene methylation: a systematic review. Biol Psychiatry. 2016;79:87–96. sourcePartly supported

  The Results (Early-life adversity; page unavailable) report increased exon 1F methylation in 9 of 10 human studies of early-life adversity. The Introduction reports decreased GR1F expression in the hippocampus of suicide completers with childhood abuse histories. The Conclusion reports exon 1F methylation in peripheral cells but says its effect on GR expression there is likely, rather than establishing peripheral GR downregulation. (LLM, conf=0.86)

  Experimental — accuracy not yet measured
• cites [81] Palma-Gudiel H, Córdova-Palomera A, Leza JC, Fañanás L. Glucocorticoid receptor gene (NR3C1) methylation processes as mediators of early adversity in stress-related disorders causality: a critical review. Neurosci Biobehav Rev. 2015;55:520–35. sourceSupported

May combine two claims.

Rodent developmental studies suggest ELS induces early maturation of threat learning and extinction, including enhanced threat learning and renewal.

“rodent developmental studies of threat learning and extinction suggest that ELS induces early maturation of these processes, including enhanced threat learning and renewal [75]”

• cites [75] Callaghan BL, Richardson R. Early experiences and the development of emotional learning systems in rats. Biol Mood Anxiety Disord. 2013;3:8. sourcePartly supported

  The Review section on adverse early-life experiences (page not provided) reports that maternal separation accelerated adult-like fear retention and extinction, and that separated infant rats showed renewal after extinction. It reports stronger retention of learned fear, but does not establish enhanced acquisition of threat learning; that part of the claim is broader than the evidence. (LLM, conf=0.82)

  Experimental — accuracy not yet measured

May combine two claims.

Youth with PTSD show disrupted hippocampal development and reduced vmPFC volume, which may contribute to impaired regulation of threat via poor contextual gating and inhibition of threat responses.

“these findings would suggest that youth with PTSD show disrupted hippocampal development and reduced vmPFC volume, which may contribute to impaired regulation of threat via poor contextual gating and inhibition of threat responses, respectively.”

May combine two claims.

Studies of adults with retrospective reports of childhood abuse suggest abuse has most prominent impact on hippocampal volume prior to age 14, amygdala volume between 10-11 years, and prefrontal volume between 14-16 years.

“studies of adults with retrospective reports of childhood abuse suggest that abuse has the most prominent impact on hippocampal volume prior to age 14, amygdala volume between 10 to 11 years of age, and prefrontal volume between 14 to 16 years of age [61].”

• cites [61] • Teicher MH, Samson JA, Anderson CM, Ohashi K. The effects of childhood maltreatment on brain structure, function and connectivity. Nat Rev Neurosci. 2016;17:652–66. Comprehensive review examining putative neural mechanisms linking childhood maltreatment to psychopathology, with consideration of both vulnerability and compensatory brain changes. sourceNot checked — no full text of the source

May combine two claims.

Reduced hippocampal volume is characteristic of adult PTSD and adults with a history of childhood trauma.

“reduced hippocampal volume is characteristic of both adult PTSD [4] and adults with a history of childhood trauma [37].”

• cites [4] Kuhn S, Gallinat J. Gray matter correlates of posttraumatic stress disorder: a quantitative meta-analysis. Biol Psychiatry. 2013;73:70–4. sourceNot checked — no full text of the source
• cites [37] Paquola C, Bennett MR, Lagopoulos J. Understanding heterogeneity in grey matter research of adults with childhood maltreatment—a meta-analysis and review. Neurosci Biobehav Rev. 2016;69:299–312. sourceNot checked — no full text of the source

May combine two claims.

Younger children with PTSD may exhibit compensatory function in automatic emotion regulatory circuitry, with relative downregulation of amygdala, which becomes compromised as they age.

“younger children with PTSD may exhibit some degree of compensatory function in automatic emotion regulatory circuitry, with relative downregulation of the amygdala, but which becomes compromised as these youth age (Figure 1).”

• AssumptionRests on an assumption: Cross-sectional age-related differences in brain measures reflect developmental changes over time.

May combine two claims.

Early life adversity may generally induce neural changes for improved automatic detection of threat (increased amygdala reactivity, age-related decline in amygdala-vmPFC coupling).

“early life adversity may generally induce neural changes geared towards improved automatic detection of threat (increased amygdala reactivity, age-related decline in amygdala-vmPFC coupling).”

May combine two claims.

Pediatric PTSD studies tend to agree with hyperactive salience network (dACC, amygdala) as youth age, and impaired recruitment of CEN (dmPFC/dlPFC).

“The studies of pediatric PTSD reviewed above tend to agree with the notion of a hyperactive salience network (dACC, amygdala) particularly as youth age, as well as impaired recruitment of the CEN (dmPFC/dlPFC).”

May combine two claims.

PTSD may differ in youth compared to adults due to heightened stress sensitivity of developing neural systems and delayed expression of full effects of childhood trauma.

“PTSD may differ in youth compared to adults both due to heightened stress sensitivity of developing neural systems, as well as delayed expression of the full effects of childhood trauma exposure.”

May combine two claims.

Pediatric PTSD shows some structural and functional brain abnormalities similar to adult PTSD, including reduced vmPFC volume and impaired recruitment of lateral prefrontal cortex.

“pediatric PTSD shows some structural and functional brain abnormalities similar to adult PTSD. Examples include reduced vmPFC volume and impaired recruitment of lateral prefrontal cortex.”

May combine two claims.

These findings may indicate general effects of early life trauma and represent brain's attempt to adaptively detect threat, at cost of sustained hypervigilance and difficulty inhibiting threat responses.

“These findings, then, may be more indicative of the general effects of early life trauma and represent the brain’s attempt to adaptively detect threat, but at the potential cost of sustained hypervigilance and difficulty of inhibiting threat responses.”

May combine two claims.

One reason for discrepancies appears to be delayed neurodevelopmental effects in pediatric PTSD, including decreasing hippocampal volume, increasing amygdala reactivity, and decreasing amygdala-mPFC coupling with age.

“One reason for such discrepancies appears to be delayed neurodevelopmental effects in pediatric PTSD, including decreasing hippocampal volume, increasing amygdala reactivity, and decreasing amygdala-mPFC coupling with age.”

• AssumptionRests on an assumption: Cross-sectional age-related differences in brain measures reflect developmental changes over time.

May combine two claims.

Studies reviewed suggest neurodevelopmental abnormalities in frontolimbic circuits in pediatric PTSD which could contribute to deficits in threat discrimination and emotion regulation.

“The studies reviewed above suggest neurodevelopmental abnormalities in frontolimbic circuits in pediatric PTSD which could contribute to deficits in threat discrimination and emotion regulation.”

May combine two claims.

Youth with PTSD exhibit both overt and developmental abnormalities in frontolimbic circuits which may contribute to increasing threat reactivity and declining emotion regulation capacity as youth age.

“youth with PTSD exhibit both overt and developmental abnormalities in frontolimbic circuits which may contribute to increasing threat reactivity and declining emotion regulation capacity as youth age (Figure 1).”

• AssumptionRests on an assumption: Cross-sectional age-related differences in brain measures reflect developmental changes over time.

May combine two claims.

Other features characteristic of adult PTSD, such as reduced hippocampal volume and hyperactivity of amygdala and insula, have not been consistently observed in pediatric PTSD.

“other features characteristic of adult PTSD, such as reduced hippocampal volume, and hyperactivity of the amygdala and insula, have not been consistently observed in pediatric PTSD.”

May combine two claims.

Adult PTSD studies suggest increased SN activity, decreased DMN and CEN activity, and inefficient modulation between CEN and DMN.

“studies of adult PTSD suggest increased SN activity, decreased DMN and CEN activity, and inefficient modulation between the CEN and DMN which could account for symptoms of hypervigilance, intrusive thought, and poor emotion regulation.”

• cites [17] Akiki T, Averill C, Abdallah CG. A network-based neurobiological model of PTSD: evidence from structural and functional neuroimaging studies. Current Psychiatry Reports. In press.Not matched

  Couldn’t be matched to a paper in Crossref, so it can’t be checked.

May combine two claims.

Recent studies implicate network level abnormalities in pediatric PTSD which may reflect effects of childhood trauma and expression of PTSD, most notably for prefrontal-amygdala connectivity.

“recent studies implicate network level abnormalities in pediatric PTSD which may reflect effects of childhood trauma and the expression of PTSD, most notably for prefrontal-amygdala connectivity.”

May combine two claims.

The net effect of these epigenetic changes is blunted glucocorticoid signaling and reduced negative feedback, leading to hyper-responsivity of HPA stress response.

“In both cases, the net effect is blunted glucocorticoid signaling and reduced negative feedback, leading to hyper-responsivity of the HPA stress response.”

May combine two claims.

Dissociative PTSD patients show increased resting coupling between amygdala and prefrontal cortex, and potentially greater anti-correlation between default mode and executive networks.

“recent studies suggest that dissociative PTSD patients show increased resting coupling between the amygdala and prefrontal cortex [65], and potentially greater anti-correlation between the default mode and executive networks [66].”

• cites [65] Nicholson AA, Densmore M, Frewen PA, Théberge J, Neufeld RW, McKinnon MC, et al. The dissociative subtype of posttraumatic stress disorder: unique resting-state functional connectivity of basolateral and centromedial amygdala complexes. Neuropsychopharmacology. 2015;40:2317–26. sourceNot checked — no full text of the source
• cites [66] Tursich M, Ros T, Frewen PA, Kluetsch RC, Calhoun VD, Lanius RA. Distinct intrinsic network connectivity patterns of post-traumatic stress disorder symptom clusters. Acta Psychiatr Scand. 2015;132:29–38. sourceNot checked — no full text of the source