15 learning W09 (NXPowerLite)

15 learning W09 (NXPowerLite) - Aspects of Learning A. Two...

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Aspects of Learning A. Two kinds of learning mediated by different brain circuits B. Learning may be due to changed strength of pre-existing synapses C. Short-term and long-term learning D. A molecular explanation for why spaced practice is better than massed practice E. Reconsolidation (if time)
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Errors Float near window marks platform location Float with diamond marks platform location Control Basal ganlion damaged Hippocampal circuit damaged Declarative/Episodic/Explicit Can bring memory to consciousness Procedural/Implicit/Habit Manifest only in performance eg.Names of faces Where car parked What for dinner last night eg. Motor skills Predicting weather Playing piece on piano Classical conditioning Visual discriminations Motor skills Place learning relative to distal cues Learning to recognize complex contexts RATS PEOPLE Trained with Hipp. Hipp. out after 1 day 30 days Hipp. Basal G. Behavioral Responses Cortex B.G. Hipp.
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Float with diamond marks platform location Float near window marks platform location
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Schematic of the four-trial sequence in the circular track task. A single trial consisted of travel from the start location to a removable food well placed at the goal location, followed by food consumption; in any given trial the goal was located at a position 2708 clockwise from the start. After completion of a trial, the goal location became the start location for the subsequent trial. After four trials the animal is at its original starting location and the sequence begins again. A recording session consisted of a sleep epoch (conducted in a separate sleep enclosure), a behavioral epoch (RUN) of 40 trials, and a subsequent sleep epoch.
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Initially weak “Hebb” synapses A B C If a presynaptic axon fires (and releases transmitter to the postsynaptic cell at about the same time as the postsynaptic
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15 learning W09 (NXPowerLite) - Aspects of Learning A. Two...

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