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Updated: Jun 15, 2026
12:33
Corticospinal Excitability Modulation During Action Observation
Published on: December 31, 2013
Fast and slow oscillations in human primary motor cortex predict oncoming behaviorally relevant cues
Maryam Saleh1, Jacob Reimer, Richard Penn
1Committee on Computational Neuroscience, University of Chicago, Chicago, IL 60637, USA.
Neuron
|March 2, 2010
Summary
Beta oscillations in the motor cortex increase during movement planning and decrease after informative cues. Delta frequency synchronizes with cue intervals, suggesting roles in attention to predictable stimuli.
Area of Science:
- Neuroscience
- Motor Control
- Brain Oscillations
Background:
- Beta oscillations (12-30 Hz) are common in motor system local field potentials.
- The precise function of beta oscillations during movement planning remains unclear.
Purpose of the Study:
- To investigate the role of beta oscillations in the primary motor cortex (MI) during movement planning.
- To examine the relationship between beta oscillations, delta frequency, and cue processing in a motor task.
Main Methods:
- Recorded local field potentials from a multielectrode array in the human MI hand area.
- Instructed a participant to plan movements based on sequentially presented visual cues.
- Analyzed beta amplitude and delta frequency entrainment in relation to cue presentation.
Main Results:
- Beta amplitude increased from trial onset until the informative cue (second or fourth), then decreased.
- Beta amplitude peaked just before each instruction cue.
- Delta frequency (0.5-1.5 Hz) entrained to cue intervals until the informative cue was presented.
Conclusions:
- Beta amplitude and delta phase in MI reflect engagement with rhythmic, predictable cues.
- These neural dynamics may enhance sensitivity to task-relevant visual information during movement preparation.
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