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Related Experiment Video

Updated: Jan 30, 2026

Compensatory Limb Use and Behavioral Assessment of Motor Skill Learning Following Sensorimotor Cortex Injury in a Mouse Model of Ischemic Stroke

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Preparing to Stop Action Increases Beta Band Power in Contralateral Sensorimotor Cortex.

Vignesh Muralidharan¹, Xinze Yu¹, Mike X Cohen²

¹University of California, San Diego.

Journal of Cognitive Neuroscience

|January 12, 2019

Summary

People prepare to stop movements by increasing beta band power in the sensorimotor cortex. This brain activity predicts how well individuals can selectively stop a response before it occurs.

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Area of Science:

Neuroscience
Cognitive Neuroscience
Motor Control

Background:

Voluntary motor control involves both initiating and inhibiting movements.
Understanding the neural mechanisms of response suppression is crucial for various applications, including clinical interventions.

Purpose of the Study:

To investigate the hypothesis that preparing to stop involves a proactive suppression of sensorimotor cortex activity.
To identify electrophysiological markers associated with the preparation to stop a specific movement.

Main Methods:

Scalp electroencephalography (EEG) was used to record brain activity.
Participants performed a task requiring them to initiate bimanual movements and selectively stop one hand's response.
Guided multivariate source separation analyzed oscillatory power changes in sensorimotor cortical areas, focusing on beta band (12-24 Hz).

Main Results:

Increased beta band power was observed in the contralateral sensorimotor cortex up to one second before the movement when preparing to stop.
This beta power increase predicted the success of response stopping on a trial-by-trial basis.
The observed effect was specific to response suppression and not related to movement initiation itself.

Conclusions:

Preparing to stop a specific response involves a proactive increase in beta band power within the contralateral sensorimotor cortex.
This finding provides a frequency-specific electrophysiological signature for the 'preparing-to-stop' state.
The results support the role of sensorimotor cortex in response inhibition and highlight the utility of advanced source separation techniques in neuroscience research.