Maternal brain resting-state connectivity in the postpartum period

Area of Science:

• Neuroscience
• Developmental Psychology
• Maternal Health

Background:

• The postpartum period involves significant maternal brain plasticity.
• Understanding intrinsic brain connectivity during this time is crucial but limited.
• Resting-state functional connectivity (rsFC) measures intrinsic brain functional architecture.

Purpose of the Study:

• To investigate the association between postpartum months and resting-state functional connectivity (rsFC).
• To explore how rsFC relates to maternal behaviors in first-time mothers.
• To identify specific brain regions showing altered connectivity over time.

Main Methods:

• Used resting-state functional magnetic resonance imaging (rsFC) in 47 first-time mothers.
• Employed seed-based correlation analysis with the amygdala as the seed region.
• Examined connectivity patterns in relation to the number of postpartum months.

Main Results:

• Later postpartum months correlated with increased amygdala connectivity to regions involved in salience detection and motivation (e.g., anterior cingulate gyrus, nucleus accumbens, caudate, cerebellum).
• Exploratory analysis suggested rsFC between the left amygdala and left nucleus accumbens positively associated with maternal structuring behavior.
• Right amygdala connectivity increased with the caudate and putamen in later postpartum months.

Conclusions:

• Postpartum brain plasticity includes changes in intrinsic functional connectivity.
• Altered connectivity, especially involving the amygdala and nucleus accumbens, may underpin maternal motivation and positive maternal behaviors.
• These findings highlight the neural basis of maternal adaptation in the postpartum period.