UCLA researchers have identified a key brain network in mice that controls stress responses and social behavior. The study, published in Nature, focused on the medial prefrontal cortex, an area previously linked to personality and emotional regulation. Researchers found that this region integrates information from across the brain to coordinate both physiological and behavioral reactions.
Lead author, professor of neurobiology at UCLA Health and director of the UCLA Brain Research & Artificial Intelligence Nexus, explained the significance of these findings. “This work gives us a wiring diagram of one of the brain’s most mysterious control centers,” said Dong. “It provides a foundation for developing targeted therapies for stress-related and social dysfunction disorders.”
The research draws on historical cases such as Phineas Gage, a railroad worker whose frontal lobe injury led to dramatic changes in personality and behavior. Gage’s case helped scientists recognize the prefrontal cortex as essential for regulating emotion and social conduct. However, until now, detailed understanding of its neural circuits was lacking.
Dong’s team used genetic labeling, 3D imaging, and AI-driven mapping to chart connections within the medial prefrontal cortex in mice. They identified two regions—the dorsal peduncular area (DP) and infralimbic area (ILA)—that serve as hubs integrating sensory input with internal signals to manage emotional stability and stress regulation. The study offers a cellular-level map of circuits similar to those found in humans.
“Our work closes a critical gap in understanding how these brain regions orchestrate complex behaviors and stress responses,” Dong said. “By identifying the precise circuits involved, we open the door to developing better diagnostic tools and targeted therapies for psychiatric and neurological disorders.”
The implications extend beyond basic science; millions affected by neuropsychiatric conditions could benefit from improved treatments based on these findings. The research was supported by funding from the NIH Brain Initiative.
