Less can be more: Fine tuning the maternal brain.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing human and animal research without systematic methodology
PubMed 34864004 · doi:10.1016/j.neubiorev.2021.11.045
What was done
This narrative review synthesizes literature examining maternal brain plasticity across pregnancy and the postpartum period (matrescence). It compiles findings on structural and functional brain changes in humans along with cellular, neural, and glial plasticity observed in animal models.
What was found
The abstract reports no numerical findings or effect sizes. It notes that plasticity in the maternal brain frequently manifests as reductions in brain volume, neurogenesis, and glial cell density, which are conceptualized as adaptive neural fine-tuning to optimize caregiving and maternal neurobehavioral outcomes.
Why it matters
The paper frames peripartum reductions in brain volume and neurogenesis as adaptive specialization rather than neural deficits, helping contextualize neurobiological changes during the transition to motherhood.
Limits
As a narrative review, it lacks a systematic search protocol, quality appraisal of included studies, and quantitative synthesis. Specific findings rely heavily on translational inferences from animal models to explain human neuroimaging observations.
Cited by
- context Pregnancy induces structural remodeling and long-lasting morphological changes in specific areas of the female brain.