EXTRA-SLIDES-Learning and Memory

EXTRA-SLIDES-Learning and Memory - 12/5/2009 The Memory...

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12/5/2009 1 Processes in LTM Encoding Processes used to store f rm ti n in m m r information in memory Storage Processes used to maintain information in memory Retrieval Processes used to get information back out of memory The Memory Consolidation Process: Hebb’s Cell Assemblies Cell assembly Reverberatory activity Phase sequence Experience triggers tivity activity Activity is essential for LTM Physiological changes
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12/5/2009 2 Is Reverberatory Activity Essential for Memory Storage? • Studies have used ECS (electroconvulsive shock) to break up the consolidation of memory. CS d t d td • ECS tends to produce retrograde amnesia supporting the idea that reverberatory activity is necessary for memory consolidation. • There are problems because ECS has aversive properties which ay inhibit responding (Duncan may inhibit responding (Duncan experiments with rats – 1949). • CS reminders have brought back memories apparently lost after CS dicating that ECS indicating that consolidation has occurred. • Therefore, forms of brain intervention (e.g., ECS) affect memory retrieval rather than consolidation.
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12/5/2009 3 The Conditioning lasticity) of Neural (Plasticity) of Neural Circuits • Thompson and associates – Studied conditioning of the nictitating membrane of the rabbit. sed a corneal air puff ( CS Used a corneal air puff (UCS) and tone (CS) – Cerebellar interpositus nucleus was found to be site of the conditioned response p
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12/5/2009 4 How does the brain associate two events? Event 1 Event 2 associate Timing is the key!!! Neural Circuits in the Rabbits Nictitating Membrane Response
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12/5/2009 5 two stimuli immediately follow one another This type of learning is known as delay conditioning because there is a temporal delay between the onsets of the two stimuli Animals learn this association easily.
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This note was uploaded on 09/07/2011 for the course COGS 17 taught by Professor Pineda during the Spring '06 term at UCSD.

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EXTRA-SLIDES-Learning and Memory - 12/5/2009 The Memory...

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