According to a recent study published in the journal Nature Neuroscience there is a brain pathway that impairs postpartum social functioning in mice. This pathway is linked to the oxytocin receptor in the brain and has been found to be a key factor in impairing social functioning after giving birth.
The study was conducted by researchers at New York University School of Medicine who found that the pathway "reduces the ability of mothers to respond appropriately to social cues from pups as well as other adult animals."
The pathway in question is the medial habenula (MHb) pathway which is involved in the processing of negative emotions and aversive stimuli. The pathway is activated by the release of stress hormones such as cortisol which are commonly elevated in postpartum women.
In the study the researchers found that mice with a disrupted MHb pathway showed increased responsiveness to social cues from their pups and were better able to establish social bonds with other animals. These mice also displayed reduced levels of anxiety and depressive-like behavior which are often associated with postpartum mood disorders.
While the study was conducted in mice the researchers believe that the findings may have implications for postpartum human mothers as well. "Our findings might contribute to a better understanding of the social deficits that can occur in postpartum depression" said Dr. Robert Froemke the senior author of the study.
The findings also suggest that targeting the MHb pathway could be a potential treatment for postpartum mood disorders. "Our work suggests that modulating the activity of the MHb pathway might be a novel strategy to promote more adaptive social interactions in postpartum females" said Dr. Froemke.
This study adds to the growing body of research on the neurobiology of postpartum mood disorders and may help advance the development of new treatments. However further research is needed to determine how the findings translate to human mothers and to develop safe and effective treatments based on these findings.
