Jerusalem, 25 January 2026 (TPS-IL) - Scientists have uncovered a rare, sharply defined neural circuit that behaves like an “on/off” switch, showing striking differences between males and females. The discovery, made by researchers in Israel and Canada, could transform our understanding of how sex, experience, and hormones interact in the brain, and eventually inform approaches to social behavior, mental health, and parenting, the Hebrew University of Jerusalem announced. The study, led by Dr. Tamar Licht and Dr. Dan Rokni from the Institute of Medical Research Israel-Canada (IMRIC) at the Hebrew University of Jerusalem, identified a previously unknown group of neurons...