University of Louisville May 14 2026 A study led by a University of Louisville School of Medicine pediatrics and child neurology researcher reveals how a specific signaling mechanism in microglia, the brain's immune cell, can regulate anxiety and grooming behaviors. These behaviors are core symptoms of autism and obsessive-compulsive spectrum disorders. The research was conducted by Naveen Nagarajan, assistant professor in the UofL Department of Pediatrics, alongside University of Utah