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Updated: Mar 12, 2026
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Corticospinal Excitability Modulation During Action Observation
Published on: December 31, 2013
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Activity in primary motor cortex during action observation covaries with subsequent behavioral changes in execution.
1School of Psychological Sciences Tel-Aviv University Tel-Aviv Israel.
Brain and Behavior
|November 16, 2016
Summary
Observing faster movements implicitly increases your own movement speed. This effect, influencing motor execution rate, is linked to activity in the primary motor cortex.
Area of Science:
- Neuroscience
- Motor Control
- Cognitive Psychology
Background:
- Movement observation enhances motor planning and memory.
- The impact of observed movement rate on execution speed and its neural basis remain unclear.
Purpose of the Study:
- To investigate how observing a movement at a different rate implicitly affects self-paced movement execution rate.
- To explore the neural mechanisms underlying this implicit rate modification.
Main Methods:
- Fifty participants performed self-paced index finger pressing before and after observing a video of the task (3 Hz) or a blank screen.
- Fifteen participants underwent functional magnetic resonance imaging (fMRI) during passive video observation and task performance.
Main Results:
- Observed movement at a higher rate implicitly increased the execution rate in slower participants.
- fMRI data revealed a positive correlation between primary motor cortex activity during observation and subsequent changes in performance rate.
Conclusions:
- Observing faster movements implicitly accelerates self-paced motor execution.
- The contralateral primary motor cortex plays a crucial role in mediating this implicit rate adjustment.
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