It is an essentially permanent storehouse of information about the world. There appear to be several types 1. HM also had some retrograde amnesia for events that occurred in the few years before his surgery. Evidence for hippocampal involvement include. HM lost his hippocampus 4.
Hippocampal lesions do the following in animals A. disrupt radial arm maze performance.
B. disrupt Morris milk maze performance. The rats are released into different areas of the maze but the platform stays constant. It is also important for distinguishing one context from another. 1. a thicker cortex 2. better capillary supply 3. more glial cells 4. more protein content 5.