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Psy 123_Lec 11 Memory

procedural memory and the basal ganglia a form of

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Unformatted text preview: Memory and the Basal Ganglia! A form of nondeclarative memory that involves the learning of a variety of motor and cognitive skills.! Tower of Hanoi! Basal Ganglia! Procedural memory is the "how to" memory. For example how to ride a bike. Often times procedural memory is very important in motor actions and motor plans, which is why we see the basal ganglia is involved. It can also do cognitive things, for example reading is very automatic. People who have damage to the basal ganglia, for example Parkinson's patients, will start to lose the ability to learn new procedures. And they can start to lose the memory for things that had been well learned in the past. And yet their episodic memory is completely intact. Thus we can see a double dissociation, where we have patients who have lost episodic memory but procedural is intact, while Parkinson pateints have episodic intact but lost procedural memory. Theory of Multiple Memory Systems! Memory is not a single brain system, but multiple systems with different psychological functions and different underlying brain structures.! Priming and Sensory Cortex! A form of nondeclarative memory in which a behavioral response is facilitated after repeated exposures to a stimulus.! Complete these word stems:! obs-----! obstruct! pref------! prefrontal! 52:00 Priming is one of those memory systems that people are not very familiar with. You can think of this as a memory system that is the facilitation of things that have occurred before. tran-------! tranquility! hippo------! hippocampus! Priming has a robust effect, and typically see a difference in reaction/responding time. Somehow the system has kept track of the first occurrence of that stimulus. Occurs for all sorts of stimuli (auditory, visual, etc) The amnesia patients with damage to the MTL will not remember seeing the word before, but will still get this priming effect. At the advent of fMRI and EEG, we began to see a neural correlate of this priming as well, and this is called repetition suppression, where you get a reduced BOLD effect the 2nd time being exposed to the word. However, hard...
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