Interestingly, silencing the activity of this region selectively reduced active decisions in targeted mice but elicited compensatory increases in non-manipulated partners, preserving overall group-level huddle time.

We find that specific neurons in the medial preoptic area that regulate parenting are also critical for comforting behavior toward adults. This suggests that neural systems evolved for offspring care may have provided a scaffold for broader prosocial support between adults.

We extended our findings to artificial intelligence systems by training artificial agents in a similar cooperation task using multi-agent reinforcement learning (MARL). The agents developed behavioral strategies and neural representations reminiscent of those observed in the biological brain, revealing parallels between cooperative behavior in biological and artificial systems.

Our findings suggest that shared neural dynamics represent a fundamental and generalizable feature of interacting neural systems present in both biological and artificial agents and highlight the functional significance of shared neural dynamics in driving social interactions.