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Related Experiment Videos

Activity in Primary Motor Cortex Related to Visual Feedback.

Steven B Suway¹, Andrew B Schwartz²

¹Center for Neuroscience, University of Pittsburgh, Pittsburgh, PA 15260, USA; Center for the Neural Basis of Cognition, Carnegie Mellon University and University of Pittsburgh, Pittsburgh, PA 15213, USA.

|December 19, 2019

Summary

This summary is machine-generated.

Neural modulation in primate motor cortex shows temporal epochs. These epochs are driven by behavior, particularly visual feedback during reaching movements.

Keywords:

motor cortex neural coding reaching visual feedback visuomotor rotation

Related Experiment Videos

Area of Science:

Neuroscience
Motor Control
Primate Studies

Background:

Neural modulation in the motor cortex is complex.
Reaching movements involve intricate temporal patterns of neural activity.

Purpose of the Study:

To investigate if temporal epochs in motor cortical modulation are driven by behavioral events.
To understand the role of visual feedback in shaping neural activity during reaching.

Main Methods:

Monkeys performed center-out reaching tasks with and without visuomotor rotation.
Single-unit recordings were used to analyze neural activity.
Visual feedback was manipulated by removing it before movement initiation.

Main Results:

Neural modulation during reaching could be separated into discrete temporal epochs.
Adaptation to visuomotor rotation affected specific temporal components of neural responses.
Adaptation-sensitive neural components at the end of movement were reduced or absent without visual feedback.

Conclusions:

Temporal structure in motor cortical activity is significantly driven by behavioral demands.
A distinct temporal component of motor cortical activity is directly related to the presence of visual feedback.