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SED: Perceptual decision making activity in LIP

Collator: Jimmy Bonaiuto
Created: November 17, 2016
Last modified by: Jimmy Bonaiuto
Last modified: November 17, 2016
Tags: perceptual decision making
Brief Description

In a motion direction discrimination task, neurons in LIP with receptive fields corresponding to the eventual decision increase their firing rates following the onset of the stimulus, while those with receptive fields in the opposite direction decrease their firing. The increase saturates during the delay period.

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Figure 1: Population response of LIP neurons during motion direction discrimination
Population response of LIP neurons during motion direction discrimination

The average firing rate is plotted as a function of time during the motion-viewing and delay periods. Solid and dashed curves are from trials in which the monkey judged direction toward and away from the RF, respectively. Error trials are not shown. Both the time course and magnitude of the response are affected by the strength of random-dot motion, particularly during the motion-viewing period.

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