PSYC 202 Study Guide - Final Guide: Dopamine Hypothesis Of Schizophrenia, Henry Molaison, 5-Ht2A Receptor
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Discuss how studying patient h. m. has contributed to our understanding of the temporal nature of memory and to the differences between types of memory. Short term memory remained intact, but long term memory was deficient. H. m. was a patient who suffered with severe epilepsy in his youth. As a result, he underwent surgery to remove brain tissue, including anterior and medial portions of the temporal lobe, which included a part of the hippocampus, a brain structure that is extremely important for memory, and the entorhinal cortex. These lesions resulted in anterograde amnesia in h. m. - he was unable to form new declarative memories. This was tested through a memory tracing test. H. m. was told to trace the outline of a shape on paper, but he was unable to see his hand in a direct line of vision- he had to see his hand through a mirror"s reflection.
