Trauma, PTSD, and the Developing Brain

In the paper

“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].”

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Disputed

  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.

  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. sourceExperimental — accuracy not yet measured

In the paper

“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].”

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [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. source

In the paper

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

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [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. source
• Supported

  The Results (fMRI Results, Task-Related Functional Connectivity Analysis; page not provided) report greater ventral mPFC–right amygdala coactivation in the PTSD group for negative emotionally intense autobiographical memories. This supports the greater-connectivity finding; the sentence assigns lower connectivity to a separate citation. (LLM, conf=0.92)

  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. source
• Supported

  The citation is attached to the lower-connectivity finding. The Results (Functional connectivity with the amygdala) report less amygdala–subgenual cingulate connectivity in the PTSD group than in trauma-exposed controls during fearful-face processing. The Introduction also describes prior amygdala–vmPFC connectivity findings in PTSD as mixed. (LLM, conf=0.93)

  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. source

In the paper

“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].”

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured

In the paper

“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].”

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [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. source
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured

In the paper

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

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Supported

  The Amygdala Functional Connectivity results report reduced left amygdala–bilateral rACC/dmPFC connectivity in youth with PTSD compared with healthy youth. The Discussion describes reduced amygdala–mPFC connectivity as inversely related to PTSD severity; the Secondary Analyses clarify that the significant association was with avoidance symptoms, not the total PTSD-RI score. (LLM, conf=0.90)

  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. source

In the paper

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

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured

In the paper

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

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured

In the paper

“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].”

What the sources say

• Supported

  In “Amygdala Functional Connectivity During Threat vs Neutral Images” (page not provided), the paper reports that amygdala-vmPFC connectivity increased with age in healthy youth but decreased with age in PTSD youth. This matches the claim about age-related coupling responses to negative images. (LLM, conf=0.95)

  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. source

In the paper

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

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured

In the paper

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

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured

In the paper

“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.”

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured

In the paper

“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].”

What the sources say

• Supported

  This paper is cited for the amygdala-reactivity clause, not the resting-coupling clause, which cites [48,49]. In the Results (page unavailable), youth with PTSD symptoms showed greater early-phase right-amygdala activation to angry and fearful faces than controls. The Discussion (page unavailable) likewise describes exaggerated activation to those faces, while noting activation to neutral faces as well. (LLM, conf=0.86)

  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. source
• ?Not checked — no full text of the sourcecites [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. source
• ?Not checked — no full text of the sourcecites [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. source
• ?Not checked — no full text of the sourcecites [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. source
• Supported

  The Discussion reports that childhood maltreatment is associated with heightened amygdala responsiveness specifically to negative stimuli, and Figure 1 reports a positive association for negative but not happy faces. The decreased resting amygdala–vmPFC coupling clause has separate citations [48,49] and is not attributed to this source. (LLM, conf=0.93)

  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. source
• ?Not checked — no full text of the sourcecites [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 source
• Supported

  This paper is cited in the [38–47] group for the increased-amygdala-reactivity clause, not the separate resting-coupling clause cited to [48,49]. The Discussion reports heightened amygdala activity in children with early institutional deprivation alongside difficulty suppressing attention to potentially threatening information. It does not need to support the resting-coupling claim to support the part attributed to it. (LLM, conf=0.88)

  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. source
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Supported

  The Results (Objective 1: Amygdala; page unavailable) report significantly greater bilateral amygdala activation in maltreated individuals than in controls. The Study selection section (page unavailable) describes facial-expression tasks focused on threat-related expressions, including fear, anger, and sadness. This source is cited for the amygdala-reactivity clause; the resting amygdala–vmPFC coupling clause has separate citations. (LLM, conf=0.88)

  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. source

In the paper

“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].”

What the sources say

• Supported

  The Figure 1 description in the Discussion reports a group-by-age interaction in right amygdala activation: activation decreased with age in healthy youth but increased with age in youth with PTSD across emotion conditions. The Discussion also says the decrease in healthy youth occurred irrespective of face valence, covering both angry and happy faces. (LLM, conf=0.94)

  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. source

In the paper

“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.”

What the sources say

• ?Not checked — no full text of the sourcecites [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. source
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [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. source
• ?Not checked — no full text of the sourcecites [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. source
• ?Not checked — no full text of the sourcecites [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. source
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [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 source
• Supported

  The Discussion reports persistent changes in fear regulation and amygdala activity after early-life stress, including parallels in children exposed to institutional care. The Abstract links early-childhood adversity to anxiety disorders and later emotional dysregulation, supporting the claim’s hedged statement about risk for affective disorders. (LLM, conf=0.88)

  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. source
• Supported

  The Introduction describes childhood adversity as a risk factor for mood and anxiety disorders. It also reports adversity-related changes in amygdala responses to negative stimuli and prefrontal activity involved in emotion regulation, supporting the citing sentence’s hedged claim about threat-processing and regulatory systems. (LLM, conf=0.91)

  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. source
• Supported

  The Introduction links early-life trauma to altered emotional processing and elevated risk for anxiety and depression. The Discussion reports changes in threat-related amygdala responses and emotion-regulatory circuitry in trauma-exposed youth, while describing the proposed contribution to later psychopathology as a possibility. The citing sentence’s “may” reflects that uncertainty. (LLM, conf=0.91)

  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. source

In the paper

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

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• ?Not checked — no full text of the sourcecites [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. source
• ?Not checked — no full text of the sourcecites [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. source
• Supported

  The Introduction reports amygdala hyperactivation in one prior youth study and negative findings in two others. The Discussion reports no amygdala hyperactivation in this paper’s pediatric PTSD sample, making it the third negative study described in the citing sentence. (LLM, conf=0.93)

  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. source

In the paper

“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.”

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured

In the paper

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

What the sources say

• ?Could 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)

  cites [62] American Psychiatric Association. Diagnostic and statistical manual of mental disorders: DSM-5. 5th ed. Washington, D.C: American Psychiatric Association; 2013. sourceExperimental — accuracy not yet measured

In the paper

“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].”

What the sources say

• Supported

  The “Chronic Stress Induced Remodeling of PFC Neural Architecture” section states that chronic stress causes dendrite shrinkage in the mPFC and hippocampus and expansion in the basolateral amygdala. The same section reports dendritic remodeling after corticosterone administration, while “Traumatic Stress Effects and Paradoxical Actions of Glucocorticoids” reports increased basolateral amygdala dendritic length after corticosterone in rats. The supplied passages do not provide page numbers. (LLM, conf=0.94)

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

In the paper

“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].”

What the sources say

• ?Could 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)

  cites [62] American Psychiatric Association. Diagnostic and statistical manual of mental disorders: DSM-5. 5th ed. Washington, D.C: American Psychiatric Association; 2013. sourceExperimental — accuracy not yet measured

In the paper

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

What the sources say

• Supported

  The Neurobiological Studies section proposes that increased medial prefrontal activation in dissociative PTSD hyperinhibits limbic regions, including the amygdala, dampening emotional responding. This supports the citing sentence’s description of heightened prefrontal recruitment and reduced amygdala-based responding. No page number is provided in our copy’s passages. (LLM, conf=0.93)

  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. source

In the paper

“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].”

What the sources say

• ?Not checked — no full text of the sourcecites [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. source
• Partly 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)

  cites [73] Liston C, Gan W-B. Glucocorticoids are critical regulators of dendritic spine development and plasticity in vivo. PNAS. 2011;108:16074–9. sourceExperimental — accuracy not yet measured
• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Supported

  The citation [44] is attached to amygdala reactivity, not to the preceding claims about hippocampal proliferation, cortical spines, or amygdala volume. The Discussion reports heightened amygdala activity in children exposed to early-life stress and persistent differences in amygdala activity in the mouse study. (LLM, conf=0.92)

  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. source

In the paper

“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.”

What the sources say

• ?Could 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)

  cites [62] American Psychiatric Association. Diagnostic and statistical manual of mental disorders: DSM-5. 5th ed. Washington, D.C: American Psychiatric Association; 2013. sourceExperimental — accuracy not yet measured

In the paper

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

What the sources say

• Supported

  The Etiological Models: Trauma and Dissociation section reports altered resting-state connectivity in dissociative PTSD and increased amygdala connectivity relative to PTSD without the dissociative subtype, which the authors say may support a distinct neurobiological profile. The Research on Structural Alterations section also reports some gray-matter differences, while its interim summary cautions that the findings are not yet clearly disorder-specific. That caution is consistent with the claim’s tentative wording. (LLM, conf=0.93)

  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. source

In the paper

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

What the sources say

• Supported

  The Results (Amygdala functional connectivity) report that childhood adversity predicted greater amygdala–dmPFC connectivity only at lower internalizing levels; at higher levels, no significant association was observed. This was measured during processing of negative versus neutral images. (LLM, conf=0.94)

  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. source

In the paper

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

What the sources say

• Supported

  The “Childhood Adversity and Methylation of NR3C1” section (page unavailable) describes studies in preschoolers, older children, and adolescents linking adversity to increased methylation of NR3C1, the glucocorticoid receptor gene. The FKBP5 section (page unavailable) reports both lower and higher methylation associated with forms of childhood adversity and says the conditions underlying those differences need clarification. (LLM, conf=0.94)

  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. source

In the paper

“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].”

What the sources say

• Partly 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)

  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. sourceExperimental — accuracy not yet measured
• Supported

  Section 3.2.1 reports that early-life stress is associated with hypermethylation in the NR3C1 1F region. Section 3.3 reports inverse correlations between methylation at first exons, including 1F, and GR expression in brain and peripheral tissues. The review notes that evidence specifically linking 1F methylation to 1F-containing transcripts in peripheral blood is lacking, but the claim concerns GR expression generally. (LLM, conf=0.88)

  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. source

In the paper

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

What the sources say

• Partly 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)

  cites [75] Callaghan BL, Richardson R. Early experiences and the development of emotional learning systems in rats. Biol Mood Anxiety Disord. 2013;3:8. sourceExperimental — accuracy not yet measured

In the paper

“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.”

In the paper

“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].”

What the sources say

• ?Not checked — no full text of the sourcecites [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. source

In the paper

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

What the sources say

• ?Not checked — no full text of the sourcecites [4] Kuhn S, Gallinat J. Gray matter correlates of posttraumatic stress disorder: a quantitative meta-analysis. Biol Psychiatry. 2013;73:70–4. source
• ?Not checked — no full text of the sourcecites [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. source

In the paper

“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).”

In the paper

“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).”

In the paper

“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).”

In the paper

“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.”

In the paper

“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.”

In the paper

“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.”

In the paper

“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.”

In the paper

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

In the paper

“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).”

In the paper

“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.”

In the paper

“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.”

What the sources say

• ?Not matched

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

  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.

In the paper

“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.”

In the paper

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

In the paper

“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].”

What the sources say

• ?Not checked — no full text of the sourcecites [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. source
• ?Not checked — no full text of the sourcecites [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. source