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Updated: Jul 9, 2026
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Force and Position Control in Humans - The Role of Augmented Feedback
Published on: June 19, 2016
Modulation of human corticomuscular beta-range coherence with low-level static forces
Matthias Witte1, Luis Patino, Agnieszka Andrykiewicz
1Neurological Clinic, Albert-Ludwigs-University, Breisacher Strasse 64, 79106 Freiburg, Germany.
The European Journal of Neuroscience
|December 7, 2007
Summary
Beta-range corticomuscular coherence increases with force levels during motor tasks. This enhanced synchronization, measured by electroencephalogram (EEG) and electromyogram (EMG), improves sensorimotor integration and motor performance.
Area of Science:
- Neuroscience
- Motor Control
- Human Physiology
Background:
- Corticomuscular synchronization in the beta range (15-30 Hz) is known during weak contractions.
- Studies examining synchronization at very low force levels (around 10% of maximum voluntary contraction - MVC) are limited.
Purpose of the Study:
- To investigate electroencephalogram (EEG)-electromyogram (EMG) coherence and cortical spectral power during a visuomotor task at low force levels.
- To determine the relationship between beta-range corticomuscular coherence and motor performance at different force outputs.
Main Methods:
- Eight healthy subjects performed an isometric force compensation task using their index finger at 4% and 16% MVC.
- EEG and EMG data were recorded to analyze corticomuscular coherence and cortical spectral power.
Main Results:
- Low coherence was observed at 4% MVC in the middle to high beta range (25-30 Hz).
- A significant increase in coherence, primarily in the low beta frequencies (19-20 Hz), was found at 16% MVC.
- Increased coherence correlated with improved force control (decreased relative error) and better motor performance periods.
Conclusions:
- Beta-range corticomuscular coherence plays a role in effective sensorimotor integration.
- This synchronization appears to stabilize corticospinal communication during motor tasks requiring precise force control.
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