Baby's Smile Lights Up Mom's Brain

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When the mother's saw photos of their own baby's face, an extensive brain network was activated, according to the study. But, it was when mothers saw their own infant's happy face that the dopaminergic reward system in particular was activated. This system was not activated when mothers saw their own children looking either sad or neutral.

"This study is fascinating. It's a step towards unraveling the chemistry of emotion, and it begins to show the complex chemistry of the mother-child relationship," said Dr. Michael Wasserman, a pediatrician at Ochsner Health System in New Orleans.

Strathearn explained that for some mothers, there may be a problem in this natural reward system, and that may help to explain why some women never bond with their children or even abuse their children.

More information

The Nemours Foundation has more on bonding with your baby.