vikram_slides2

vikram_slides2 - Neural codes for perceptual discrimination...

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Authors: COGS 160: Neural Coding in Sensory Systems Instructor: Prof. Angela Yu Presenter: Vikram Gupta Date: 05/20/10 Neural codes for perceptual discrimination in primary somatosensory cortex
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Outline Introduction Method Background Motivation to the Problem + Main result Experiments and Results Discussion Postcentral Gyrus (Brodmann areas 3, 1 and 2) Source Wikipedia
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Experiment Two Monkeys were trained for the following task. Probe is applied to one of the fingers Vertical oscillation of the probe occurs at f1 and later at f2 Monkey discriminates the difference f1 > f2 ? Receives reward
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Experiment: Recording Areas Recordings are made in S1 (areas 3b and 1) Neurons chosen had: small cutaneous receptive field at the tip of index, middle or ring finger quickly adapting properties firing decreases or stops with steady stimulus Firing rates are insensitive to amplitude of the input as long as the amplitude is above threshold.
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Background Quickly adapting neurons of S1 are directly involved in frequency discrimination (5-50Hz) of vibrotactile stimuli: firing is phase locked with frequency Which component of neuronal firing is mediating the behavioral
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This note was uploaded on 09/15/2011 for the course COGS 1 taught by Professor Lewis during the Spring '08 term at UCSD.

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vikram_slides2 - Neural codes for perceptual discrimination...

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