Brown Fat Tissue Communicating With Brain (IMAGE) Georgia State University Caption These are sensory and sympathetic nerves connected to brown fat through the nervous system. Sensory nerves (red/orange) send information from fat to the brain and sympathetic nerves (green/orange) send the signal for fat to be activated or break down. Credit Georgia State University 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.