Dopamine Innervation into the Hippocampus (IMAGE) University of Pennsylvania School of Medicine Caption Dopamine innervation into the hippocampus. Green denotes general catecholamine -- a general name for dopamine -- innervation of the CA1 region of the hippocampus. Yellows denotes dopamine nerve endings in the same region. Scale bar is 50 microns. Credit Credit: John Dani, Ph.D., Perelman School of Medicine, University of Pennsylvania 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.