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BIOL 1F25 - Lec 8

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Brock University
Nicholas D Vesprini

Lecture 8 General principles of memory -memory involves many regions of the brain -different types of memory exist and are stored differently -certain regions of the brain are more important for specific types of memory -first evidence that memory processes are localized in the brain was by neurosurgeon Dr. W. Penfield -in the 1940s he began using electrical stimulations of brains of human patients undergoing surgery to relieve focal epilepsy; elicited flashbacks in some patients, only on stimulation of temporal lobe -Brenda Milner; study H.M., a patient whose hippocampus had been surgically removed from both temporal lobes to control seizures; removal of medial portion of temporal lobes greatly reduced seizures but experienced devastating memory loss and could not form new long-term memories; retained memories from before surgery; short-term memory also intact Different ways of learning 1. Explicit memory; what the world is about e.g. knowledge of people, places, and things 2. Implicit memory; how to do things e.g. motor skills and things not available to consciousness -H.M. could not form new explicit long-term memories Hippocampus and Learning/Memory -hippocampus: area of brain involved in learning that requires a conscious record e.g. faces, names (explicit memory) -involved in process of acquiring and storing long-term memories How does hippocampus contribute to memory? 1. Develops map of stored
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