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Updated: Mar 25, 2026
12:33
Corticospinal Excitability Modulation During Action Observation
Published on: December 31, 2013
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Viewing Instructions Accompanying Action Observation Modulate Corticospinal Excitability
David J Wright1, Sheree A McCormick1, Jacqueline Williams2
1Centre for Health, Exercise and Active Living, Manchester Metropolitan University UK.
Frontiers in Human Neuroscience
|February 13, 2016
Summary
Action observation interventions can improve motor (re)learning. Instructions to actively imagine performing movements during observation enhance corticospinal excitability more than passive viewing, suggesting an optimal method for motor function improvement.
Area of Science:
- Neuroscience
- Motor Control
- Rehabilitation Science
Background:
- Action observation interventions show promise for enhancing motor function and brain plasticity.
- Optimal delivery methods for action observation interventions require further investigation.
Purpose of the Study:
- To investigate how different viewing instructions during action observation affect corticospinal excitability.
- To determine the most effective method for enhancing motor function through action observation.
Main Methods:
- Participants (N=21) observed finger-thumb opposition movements under three conditions: passive observation, observation with imitation intent, and observation with concurrent mental imagery.
- Corticospinal excitability was measured using motor evoked potentials (MEPs) via single-pulse transcranial magnetic stimulation (TMS) of the left motor cortex.
Main Results:
- All action observation conditions significantly increased corticospinal excitability compared to observing a static hand.
- Combined action observation and mental imagery resulted in greater facilitation of corticospinal excitability than passive observation.
Conclusions:
- Action observation, particularly when combined with mental imagery, enhances corticospinal excitability.
- Instructions encouraging simultaneous mental imagery during action observation may represent an optimal strategy for motor (re)learning interventions.
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