Mouse study finds parenting brain circuit drives helping behavior
Mar 5th 2026
UCLA researchers report in Nature that the medial preoptic area and its projection to the brain reward system underlie both parental care and comforting of distressed adults in mice, providing neural evidence for an evolutionary link between parenting and prosocial behavior.
- Mice that spent more time caring for pups also spent more time comforting stressed adult peers.
- Neurons in the medial preoptic area activate when mice interact with both pups and distressed adults.
- Silencing neurons recruited during pup care reduced helping of stressed adults, showing a causal link between parenting and prosocial circuits.
- An MPOA pathway to the nucleus accumbens controls both behaviors by triggering dopamine release, making helping intrinsically rewarding.
- The results support the idea that prosocial behavior evolved from parental care circuits and may illuminate social deficits in psychiatric conditions.