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Lecture

Lecture 38

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Department
Biology
Course
BIOL 2P94
Professor
Dirk De Clercq
Semester
Fall

Description
Outline of Lecture 38 (03-06 A; Shadmehr) Motor System III – Posterior Parietal Cortex I. The posterior parietal cortex (PPC) determines eye-centered locations and plans movement - The receptive field of visual cortex neurons (occipital lobe) is retinocentric - PPC neurons receive eye/head position and image location information and encode them as the gain of discharge rate and receptive field, respectively; this is all the information needed to for PPC to compute target in eye-centered coordinates - In a delay task, PPC neurons encode target of intended movement during delay period even if the target disappears - PPC does not encode forces needed to move to the target - The PPC also computes hand position from visual and/or proprioception input; the visual sight of one’s own hand is particularly meaningful, as there are PPC cells that only resp
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