Despite growing evidence on effects of parenthood on social understanding, little is known about the influence of parenthood on theory of mind, the capacity to infer mental and affective states of others. It is also unclear whether any possible effects of parenthood on theory of mind would generalise to inferring states of adults or are specific to children. We investigated neural activation in mothers and women without children while they predicted action intentions from child and adult faces. Region-of-interest analyses showed stronger activation in mothers in the bilateral posterior cingulate cortex, precuneus (ToM-related areas) and insulae (emotion-related areas). Whole-brain analyses revealed that mothers compared to non-mothers more strongly activated areas including the left angular gyrus and the ventral prefrontal cortex but less strongly activated the right supramarginal gyrus and the dorsal prefrontal cortex. These differences were not specific to child stimuli but occurred in response to both adult and child stimuli and might indicate that mothers and non-mothers employ different strategies to infer action intentions from affective faces. Whether these general differences in affective theory of mind between mothers and non-mothers are due to biological or experience-related changes should be subject of further investigation.
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