PSY270H5 Lecture Notes - Lecture 5: Retrograde Amnesia, Semantic Memory, Endel Tulving
Document Summary
Evidence for the distinction between explicit and implicit memory systems comes from people suffering from amnesia. Implicit: unconscious, we think of but we didn"t know we have it. Patients with amnesia can lose one and still have the other. Retrograde amnesia: memory loss for events prior to trauma (injury), it is graded> coming back slowly, most memory loss just right before injury, oldest memory is retained, improves with time, but depends on severity of injury. Anterograde amnesia: memory loss for events after trauma, unable to form new memories, does not improve overtime. By 27, they were so severe could no longer work they became intractable seizure disorder: can"t be treated. Bilateral removal of medial temporal lobe in 1953. When all neurons in the brain acting same time in sync. It always starts in one part of brain which recruits the rest of the brain. Intelligence, language, personality, and memory for past events relatively intact.
