At that developmental period, weaker brain connections are eliminated, leaving a more efficient and more specialized neural network, she said. Adolescents with a more mature network meaning, less grey matter actually show increased brain activity in their thinned-down regions, she observed. Reduced volume does not necessarily reflect reduced brain activity, said Hoekzema. In fact, participants of the new study took cognitive tests during their MRI session with no significant changes seen over time. However, following their pregnancies, the mothers had fewer correct responses on the verbal word list learning task, though to an extent considered insignificant by the researchers. Reduction in gray matter occurred in various regions of the brains of pregnant women, including the prefrontal and temporal cortex. These areas are involved in a number of behaviors, noted Dr. Kim Yonkers, a professor in psychiatry and obstetrics and gynecology at Yale School of Medicine who was not involved in the new study. She explained some of these regions are involved in memory, while others are implicated in depression. Changes in these areas may help women forget the pain or difficulty of pregnancy, suggested Yonkers.
For the original version including any supplementary images or video, visit http://wtvr.com/2016/12/22/pregnancy-changes-a-mothers-brain-for-years-study-shows/
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