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Related Experiment Video

Updated: Jun 28, 2026

Corticospinal Excitability Modulation During Action Observation

Corticospinal Excitability Modulation During Action Observation

Published on: December 31, 2013

Executed and observed movements have different distributed representations in human aIPS.

Ilan Dinstein¹, Justin L Gardner, Mehrdad Jazayeri

¹Center for Neural Science, New York University, New York, New York 10003, USA. ilan@cns.nyu.edu

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|October 31, 2008

Summary

This summary is machine-generated.

The human brain represents executed and observed hand movements differently. While the anterior intraparietal sulcus (aIPS) processes both, distinct neural populations suggest separate representations for seeing and doing movements.

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Area of Science:

Neuroscience
Cognitive Neuroscience
Motor Control

Background:

Understanding how the brain represents actions is crucial for cognitive neuroscience.
Previous research suggests overlapping neural mechanisms for action observation and execution.

Purpose of the Study:

To investigate the similarity and differences in neural representations of executed versus observed hand movements.
To determine the role of the anterior intraparietal sulcus (aIPS) in action perception and execution.

Main Methods:

Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
Multivariate pattern classification analysis was applied to fMRI data to decode movement identities.
Participants observed and executed hand movements, specifically in a rock-paper-scissors game.

Main Results:

Executed movements were classified in motor cortex; observed movements were classified in visual cortex.
Both executed and observed movements were classified in the anterior intraparietal sulcus (aIPS).
Classification was accurate within modalities (visual or motor) but not across modalities in aIPS.

Conclusions:

The anterior intraparietal sulcus (aIPS) plays a key role in both perceiving and executing movements.
Despite overlapping function in aIPS, distinct neural subpopulations represent observed and executed movements.
Neural representations for observed and executed movements are largely separate in the human brain.