Nerve Excitation (IMAGE) RIKEN Caption This image shows change in the propagation of the nerve excitation from the habenula in the naïve, winner and loser fish. The red areas indicate the propagation pathways of nerve excitation from the habenula (Hb). Credit RIKEN Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.