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Related Experiment Video

Updated: Jun 15, 2026

Corticospinal Excitability Modulation During Action Observation

Corticospinal Excitability Modulation During Action Observation

Published on: December 31, 2013

Action execution engages human mirror neuron system more than action observation.

Christopher Chad Woodruff¹, Shannon Maaske

¹Department of Psychology, Northern Arizona University, Flagstaff, Arizona 86011-5036, USA. Chad.Woodruff@nau.edu

|March 12, 2010

Summary

Researchers found that electroencephalographic mu suppression is greater during action execution than observation in humans. This finding supports the existence of a human mirror neuron system, similar to that observed in monkeys.

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Area of Science:

Neuroscience
Primate Social Cognition
Human Brain Activity

Background:

Mirror neurons in macaque monkeys are theorized to underpin primate social abilities.
Debate exists regarding whether human functional brain measures accurately reflect mirror neuron activity.
Electroencephalographic (EEG) mu suppression is proposed as a potential indicator of human mirror neuron system activity, but requires further validation.

Purpose of the Study:

To investigate whether electroencephalographic mu suppression in humans mirrors the pattern observed in macaque monkeys.
To provide further evidence for or against the existence of a human mirror neuron system.

Main Methods:

Recorded electroencephalographic (EEG) mu suppression in human participants.
Compared mu suppression levels during the execution of an action versus the observation of the same action.
Analyzed data for patterns consistent with mirror neuron activity.

Main Results:

Significantly greater mu suppression was observed during action execution compared to action observation.
This pattern of mu suppression in humans is analogous to findings in macaque monkeys.
The results provide quantitative support for the interpretation of EEG mu suppression as a marker of mirror neuron activity.

Conclusions:

The study's findings support the claim that electroencephalographic mu suppression reflects mirror neuron activity in humans.
The data align with the hypothesis of a shared neural mechanism for action execution and observation across primate species.
Further research can build upon these findings to explore the role of the human mirror neuron system in social cognition.