Cited by 440Neuroendocrine regulation and behaviorMaternal Mental Health During Pregnancy and PostpartumNeural and Behavioral Psychology Studies

The plasticity of human maternal brain: Longitudinal changes in brain anatomy during the early postpartum period

Open access
Kim, Pilyoung, Leckman, James F., Mayes, Linda C., Feldman, Ruth, Wang, Xin, Swain, James E.·2010·Behavioral Neuroscience

Abstract

Animal studies suggest that structural changes occur in the maternal brain during the early postpartum period in regions such as the hypothalamus, amygdala, parietal lobe, and prefrontal cortex and such changes are related to the expression of maternal behaviors. In an attempt to explore this in humans, we conducted a prospective longitudinal study to examine gray matter changes using voxel-based morphometry on high resolution magnetic resonance images of mothers' brains at two time points: 2-4 weeks postpartum and 3-4 months postpartum. Comparing gray matter volumes across these two time points, we found increases in gray matter volume of the prefrontal cortex, parietal lobes, and midbrain areas. Increased gray matter volume in the midbrain including the hypothalamus, substantia nigra, and amygdala was associated with maternal positive perception of her baby. These results suggest that the first months of motherhood in humans are accompanied by structural changes in brain regions implicated in maternal motivation and behaviors.

AI snapshot

Written from the paper’s full text.

TL;DR

In a prospective longitudinal MRI study of 19 mothers, gray matter volume increased from 2–4 weeks to 3–4 months postpartum in prefrontal, parietal, and midbrain regions. Mothers’ positive perception of their baby at Time 1 predicted gray matter increase in a midbrain cluster including hypothalamus, amygdala, and substantia nigra.

Key findings

  • From Time 1 (2–4 weeks postpartum) to Time 2 (3–4 months postpartum), mothers showed increased gray matter volume in superior, middle, and inferior prefrontal cortex, precentral and postcentral gyrus, superior and inferior parietal lobe, insula, and thalamus, p < .05 FDR corrected, >100 voxels; no region showed decreased gray matter volume.
  • Positive thoughts on baby at Time 1 averaged 6.11 (SD = 2.83; range 1–12) and significantly predicted gray matter volume change in a midbrain cluster including hypothalamus, amygdala, and substantia nigra, controlling for parenting experience and scan interval, β = .44, p = .01.
  • Positive thoughts on parenting averaged 8.21 (SD = 7.71; range 1–32) and did not significantly predict gray matter changes in the same midbrain region.

Methods

  • Prospective longitudinal study of 19 biological mothers of full-term, healthy infants (mean age = 33.27, SD = 6.07), recruited at Yale-New Haven Hospital; all were right-handed, Caucasian, married or cohabiting, and breastfeeding.
  • High-resolution T1-weighted MRI scans were obtained at 2–4 weeks postpartum (Time 1) and 3–4 months postpartum (Time 2), with an average interval of 76.53 days (SD = 9.88).
  • Optimized voxel-based morphometry (VBM) with paired t tests tested gray matter changes; whole-brain significance used FDR 5% and extent threshold of 100 voxels. Multiple regression tested associations between YIPTA-R positive thoughts on parenting/baby and midbrain gray matter volume changes, controlling for parenting experience and scan interval.

Limitations

  • The paper states the sample is relatively small and requires replication in larger groups; causal directionality is not clear; maternal behaviors were measured by subjective reports; and VBM has limited ability to interpret microstructural/functional nature of findings.
  • The paper notes the sample included healthy mothers of healthy infants in supportive environments, so mothers with genetic/environmental risk factors may show different patterns.
  • The paper states other factors should be monitored in future studies, including hormones, pregnancy stress, menstrual cycle changes, hydration, weight, and nutritional status; it also suggests future studies include pregnancy baseline scans and comparisons with age-matched women without parenting experience.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1037/a0020884

Cites

46 of 46 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 43 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    Positive thoughts on parenting did not significantly predict gray matter changes in the same midbrain region.

    “The positive thoughts on parenting did not significantly predict the gray matter changes in the same region.”
    Quote in the paperNot a substantial claim
  • Findingown data

    Mothers' positive thoughts on baby at Time 1 significantly predicted gray matter volume change from Time 1 to Time 2 in a cluster of the midbrain including hypothalamus, amygdala, and substantia nigra, controlling for parenting experience and scan interval, β = .44, p = .01.

    “The mother’s positive perception of her baby at Time 1 significantly predicted gray matter volume change from Time 1 to Time 2 in a cluster of the midbrain including hypothalamus, amygdala, and substantia nigra, controlling for parenting experience and scan interval, β = .44, p = .01”
    • Also stated in: § Abstract · plain
      “Increased gray matter volume in the midbrain including the hypothalamus, substantia nigra, and amygdala was associated with maternal positive perception of her baby.”
    Quote in the paperSubstantial claim
  • Findingown data

    No brain region showed a decrease in gray matter volumes from Time 1 to Time 2.

    “No brain region showed a decrease in gray matter volumes from Time 1 to Time 2, p < .05 (FDR corrected), > 100 voxels.”
    Quote in the paperSubstantial claim
  • Findingown data

    From Time 1 (2-4 weeks postpartum) to Time 2 (3-4 months postpartum), mothers showed an increase in gray matter volume in a number of brain regions including superior, middle and inferior prefrontal cortex, precentral and postcentral gyrus, superior and inferior parietal lobe, insula and thalamus.

    “Optimized whole brain VBM analyses revealed that from Time 1 (2–4 weeks postpartum) to Time 2 (3–4 months postpartum), mothers showed an increase in gray matter volume in a number of brain regions including superior, middle and inferior prefrontal cortex, precentral and postcentral gyrus, superior and inferior parietal lobe, insula and thalamus, p < .05 (FDR corrected), > 100 voxels”
    Quote in the paperSubstantial claim
  • Findingown data

    Mothers showed increases in gray matter volume during the early postpartum period in several key maternal motivation and behavior regions including bilateral hypothalamus, amygdala, substantia nigra, and globus pallidus.

    “Several key maternal motivation and behavior regions including bilateral hypothalamus, amygdala, substantia nigra, and globus pallidus showed increases in gray matter volume during the early postpartum period.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim. 27
  • May combine two claims. 12
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    The right substantia nigra is a key region of the mesolimbic dopaminergic system responsible for processing reward signals.

    “An increase in gray matter volumes was also found in the right substantia nigra, a key region of the mesolimbic dopaminergic system responsible for processing reward signals”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Schultz, Dayan, & Montague, 1997

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

    Premisenone given

    Activations of the amygdala, particularly the medial amygdala, inhibit maternal responses to pup in virgin rats.

    “Activations of the amygdala, particularly the medial amygdala, inhibit maternal responses to pup in virgin rats.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    Our findings on the plasticity of the parental brain demonstrate normative changes among human mothers since the sample included healthy mothers of healthy infants who lived in supportive environments.

    “Finally, our findings on the plasticity of the parental brain demonstrate normative changes among human mothers since the sample included healthy mothers of healthy infants who lived in supportive environments.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The sample of healthy mothers of healthy infants living in supportive environments is representative of normative human mothers.
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    The prefrontal cortex is involved in integrating these information and monitoring parental behaviors.

    “The prefrontal cortex is involved in integrating these information and monitoring parental behaviors”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Afonso, Sison, Lovic, & Fleming, 2007

      Not checked in the free run.

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

    Premisecitation

    Animal studies suggest that once mothers are exposed to their offspring, pathways involving the medial amygdala may be a key to consolidating maternal learning about the infant.

    “However, animal studies suggest that once mothers are exposed to their offspring, such pathways involving the medial amygdala may be a key to consolidating maternal learning about the infant”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Fleming, Gavarth, & Sarker, 1992

      Not checked in the free run.

    • cites Mayes, 2006

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  • May combine two claims.

    Premisecitation

    In human mothers, recent fMRI brain studies have reported that many brain regions including substantia nigra, amygdala, thalamus, parietal cortex, and prefrontal cortex were activated in response to infant-related stimuli, supporting the role of these brain areas for the development and expression of parenting behaviors.

    “In human mothers, recent functional MRI (fMRI) brain studies have reported that many of these brain regions including substantia nigra, amygdala, thalamus, parietal cortex, and prefrontal cortex were activated in response to infant-related stimuli, supporting the role of these brain areas for the development and expression of parenting behaviors”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Lenzi et al., 2008

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    • cites Lorberbaum et al., 2002

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    • cites Noriuchi et al., 2008

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

    Interpretationcitation

    The increase in regional gray matter volume may be attributed to enlarged neuropil, neuronal size, or extended dendritic, or axonal arborization.

    “This increase may be attributed to enlarged neuropil, neuronal size, or extended dendritic, or axonal arborization”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Ashburner & Friston, 2001

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    • cites Draganski & May, 2008

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  • Classified as probably not a substantial claim.

    Study design and conductcitation

    Statistical significance was defined using a whole-brain false-discovery-rate (FDR) of 5% and an extent threshold of 100 voxels after multiple comparison correction.

    “Statistical significance was defined using a whole-brain false-discovery-rate (FDR) of 5% (p < .05) and an extent threshold of 100 voxels after multiple comparison correction”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Genovese, Lazar, & Nichols, 2002

      Not checked in the free run.

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

    Premisecitation

    The animal literature underlines the importance of these structures for parenting and lesions in the hypothalamus including MPOA impairs maternal motivation and in the MPOA regions increase the likelihood of infanticide.

    “The animal literature underlines the importance of these structures for parenting and lesions in the hypothalamus including MPOA impairs maternal motivation and in the MPOA regions increase the likelihood of infanticide”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Flannelly et al., 1986

      Not checked in the free run.

    • cites Novakova et al., 1993

      Not checked in the free run.

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

    Study design and conductnone given

    The study has a relatively small sample size and requires replication in larger groups.

    “First, although the findings are in accord with animal literature, the study has a relatively small sample size and requires replication in larger groups.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    Interpreting the microstructural and functional nature of the VBM findings is limited.

    “Third, although VBM is an increasingly widely used tool to examine changes in brain structure among healthy and clinical population (Good et al., 2001; Rüsch et al., 2003), interpreting the microstructural and functional nature of the findings is limited.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Interpretationreasoning

    The increase in gray matter volumes in the PFC reported here is associated with the mothers' adaptation to orchestrate a new and increased repertoire of complex interactive behaviors with infants during the early postpartum.

    “Thus, it is possible that the increase in gray matter volumes in the PFC reported here is associated with the mothers’ adaptation to orchestrate a new and increased repertoire of complex interactive behaviors with infants during the early postpartum.”
    Quote in the paperSubstantial claim
  • Classified as probably not a substantial claim.

    Premisecitation

    The amount of experience interacting with pups was correlated with enhanced c-fos expression and cortical representation in the hypothalamus (MPOA), basolateral amygdala, parietal cortex and prefrontal cortex of rat mothers.

    “For example, the amount of experience interacting with their pups was correlated with enhanced c-fos expression and cortical representation in the hypothalamus (MPOA), basolateral amygdala, parietal cortex and prefrontal cortex of rat mothers”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Featherstone et al., 2000

      Not checked in the free run.

    • cites Fleming & Korsmit, 1996

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    • cites Kinsley et al., 1999

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

    Premisecitation

    The ventral pallidum, a part of the globus pallidus, receives inputs from substantia nigra and regulates motor activities and behavioral reactivity.

    “The ventral pallidum, a part of the globus pallidus, receives inputs from substantia nigra and regulates motor activities and behavioral reactivity”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Nestler, 2001

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

    Study design and conductnone given

    The causal directionality of the association between infant experience and structural development in parental brain areas is not clear.

    “Second, although our finding suggest that experience with infants during the first few months is associated with structural development in brain areas that are important for parental motivation and behaviors, the causal directionality is not clear.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductown data

    Parenting experience and scan interval were included as control variables in the VBM analysis.

    “Parenting experience (primiparous = −0.5; multiparous = 0.5) and scan interval were included as a control variable.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    The findings are in accord with animal literature.

    “although the findings are in accord with animal literature”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Premisecitation

    Animal studies have shown that increased interactions with pups over time during the early postpartum period lead to structural changes in the maternal brain.

    “Animal studies have shown that increased interactions with pups over time during the early postpartum period lead to structural changes in the maternal brain.”
    Quote in the paperSubstantial claim0 of 3 sources checked
    • cites Featherstone et al., 2000

      Not checked in the free run.

    • cites Fleming & Korsmit, 1996

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    • cites Kinsley et al., 1999

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

    Premisecitation

    Amygdala activations have been found to be important for maternal behaviors in rodents and nonhuman primates.

    “Finally, amygdala activations has been found to be important for maternal behaviors in rodents and nonhuman primates”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Kling & Steklis, 1976

      Not checked in the free run.

    • cites Sheehan et al., 2001

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

    Study design and conductnone given

    Maternal behaviors were measured based on mothers' subjective reports.

    “Also, we measure maternal behaviors based on mothers’ subjective reports.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisecitation

    Structural reorganization in the MPOA was sensitive to postpartum experience; increased amount of interactions with pups was associated with greater density in MPOA in rat mothers.

    “Structural reorganization in the MPOA was also found to be sensitive to postpartum experience; the increased amount of interactions with pups was associated with greater density in MPOA in rat mothers”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Featherstone et al., 2000

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    • cites Fleming & Korsmit, 1996

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    • cites Lonstein et al., 1998

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

    Premisecitation

    Lesion studies have shown that the medial preoptic areas (MPOA) and its connections with the mesolimbic dopamine system for reward processing play a critical role in maternal motivation.

    “For example, lesion studies have shown that the medial preoptic areas (MPOA), located in the rostral hypothalamus, and its connections with the mesolimbic dopamine system for reward processing play a critical role in maternal motivation”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Numan & Insel, 2003

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    • cites Swain et al., 2004

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

    Premisecitation

    Hypothalamus and globus pallidus have previously been implicated in maternal responses to infant stimuli in humans.

    “Hypothalamus and globus pallidus have previously been implicated in maternal responses to infant stimuli in humans”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites Bartels & Zeki, 2004

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    • cites Lorberbaum et al., 2002

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

    Premisecitation

    The thalamus, parietal cortex, and brainstem serve important functions for the processing of infant-related somatosensory information, such as smell, touch, and vocalizations.

    “The thalamus, parietal cortex, and brainstem also serve important functions for the processing of infant-related sometosensory information, such as smell, touch, and vocalizations”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Xerri, Stern, & Merzenich, 1994

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

    Study design and conductown data

    The YIPTA-R positive thoughts on baby and positive thoughts on parenting subscales had Cronbach's alpha reliability of .78 and .85, respectively.

    “Cronbach’s alpha value for the reliability was .78 for positive thoughts on baby, and .85 for positive thoughts on parenting.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    These changes in the parietal cortex only occurred when mothers interacted with their pups but not when they were only exposed to the pups' smells or sounds.

    “Moreover, these changes in the parietal cortex only occurred when mothers interacted with their pups but not when they were only exposed to the pups’ smells or sounds”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Fleming & Korsmit, 1996

      Not checked in the free run.

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

    Premisecitation

    Changes in menstrual cycles or in hydration, weight and nutritional status may produce alterations in brain structure.

    “Other factors such as changes in menstrual cycles (Protopopescu et al., 2008) or in hydration, weight and nutritional status (Castro-Fornieles et al., 2009; Raji et al., 2010) may also produce alterations in the brain structure.”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Protopopescu et al., 2008

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    • cites Castro-Fornieles et al., 2009

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    • cites Raji et al., 2010

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

    Premisecitation

    Mother rats with medial prefrontal cortex lesions exhibited deficits in certain maternal behaviors such as pup retrievals and licking behavior, but not in nest building or pup mouthing.

    “Afonso and colleagues (2007) found that mother rats with medial prefrontal cortex lesions exhibited deficits in a certain maternal behaviors such as pup retrievals and licking behavior, but not in nest building or pup mouthing.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites Afonso et al., 2007

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

    Premisecitation

    Animal studies demonstrate that hormones including estrogen, oxytocin, and prolactin act in several brain areas to activate maternal behaviors in response to infant-related stimuli and changes in these hormones during the early postpartum period affect anatomical changes.

    “Animal studies demonstrate that hormones including estrogen, oxytocin, and prolactin act in several brain areas to activate maternal behaviors in response to infant-related stimuli (Pedersen, Caldwell, Peterson, Walker, & Mason, 1992; Wamboldt & Insel, 1987) and changes in these hormones during the early postpartum period affect anatomical changes (Rosenblatt, 2002).”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites Pedersen et al., 1992

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    • cites Wamboldt & Insel, 1987

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    • cites Rosenblatt, 2002

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

    Premisecitation

    Greater activations in frontal regions including superior and middle frontal gyrus (BA 9, 10) and medial frontal gyrus (BA8) have been found in almost every fMRI study of human mothers' responses to infant stimuli.

    “greater activations in frontal regions including superior and middle frontal gyrus (BA 9, 10) and medial frontal guys (BA8) have been found in almost every fMRI study of human mothers’ responses to infant stimuli”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites Swain et al., 2007

      Not checked in the free run.

30 of 30
  • The paper relies on this without support.

    The hypothesis that similar structural changes occur in the brain of human mothers during the early postpartum period has not been rigorously tested in human mothers yet.

    “However, this hypothesis has not been rigorously tested in human mothers yet.”
  • The paper relies on this without support.

    The sample of healthy mothers of healthy infants living in supportive environments is representative of normative human mothers.

    “our findings on the plasticity of the parental brain demonstrate normative changes among human mothers since the sample included healthy mothers of healthy infants who lived in supportive environments.”
2 of 2

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  • Noriuchi citation year differs from the reference list

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    The discussion cites Noriuchi et al. as 2007, but the paper's Noriuchi reference is dated 2008.

  • Ashburner and Friston citation year differs from the reference list

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    The discussion cites Ashburner and Friston as 2001, but their listed reference is dated 2000.

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Research works printed but not linked: 1

  1. Brett M Anton J Valabregue R Poline J 2002 6 Region of interest analysis using an SPM toolbox [abstract] Paper presented at the 8th International Conference on Functional Mapping of the Human Brain Sendai, Japan

Cited by

Sorted by citations

Authors
Kim, P., Leckman, J. F., Mayes, L. C., Feldman, R., Wang, X., & Swain, J. E.
Affiliations
  • Cornell University (US)
  • Yale University (US)
  • Anna Freud Centre (GB)
  • Bar-Ilan University (IL)
  • University of Michigan (US)
Venue
Behavioral Neuroscience
Published
2010
Volume
124
Issue
5
Pages
695-700
ISSN
  • 0735-7044 (ISSN-L)
  • 1939-0084
OpenAlex
W2056013081
Cited by
440
References
45
Citations by year
2026: 21 · 2025: 24 · 2024: 33 · 2023: 30 · 2022: 31 · 2021: 41 · 2020: 47 · 2019: 30 · 2018: 27 · 2017: 31 · 2016: 22 · 2015: 25 · 2014: 24 · 2013: 21 · 2012: 19
FWCI
23.50
Type
journal article
Language
en
Open access
Locations
  • Behavioral Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Cornell University
  • US-Israel Binational Science Foundation (2005–273)
  • Institute for the Study of Unlimited Love
  • National Alliance for Research on Schizophrenia and Depression
  • National Institute of Mental Health (K05MH076273)
  • National Institute on Drug Abuse (5K05DA020091)
  • Associates of the Yale Child Study Center
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Maternal Mental Health During Pregnancy and Postpartum
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
maternal brain, postpartum period, gray matter volume, neuroplasticity, maternal behavior, prefrontal cortex, parietal lobe, midbrain, hypothalamus, amygdala, substantia nigra, maternal motivation, longitudinal brain changes
MeSH terms
Adult, Brain, Female, Humans, Magnetic Resonance Imaging, Maternal Behavior, Neuronal Plasticity, Nerve Fibers, Unmyelinated, Postpartum Period

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