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Online Transcranial Magnetic Stimulation Protocol for Measuring Cortical Physiology Associated with Response Inhibition
Published on: February 8, 2018
Brain activity evoked by motor inhibition before volitional finger movement
1Graduate School of Information Sciences, Hiroshima City University, Hiroshima, Japan.
Neuroreport
|August 28, 2013
Summary
Researchers studied brain activity during motor inhibition before finger movement. A unique electroencephalography (EEG) signal in the frontocentral scalp indicates interrupted motor intent and revised planning before movement.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Motor Control
Background:
- Volitional motor control involves complex planning and execution.
- Understanding the neural mechanisms of motor inhibition is crucial for diagnosing and treating movement disorders.
Purpose of the Study:
- To investigate the brain activity associated with motor inhibition prior to volitional finger movement.
- To identify specific electroencephalography (EEG) patterns related to the interruption of motor intent.
Main Methods:
- Seven participants performed a finger-pressing task with a go-signal.
- A stop-signal was randomly presented at varying intervals before the go-signal (prestop task).
- Cerebral potentials were recorded using a 20-channel EEG system.
Main Results:
- Movement-related cortical potentials were observed in the absence of a stop-signal.
- Participants successfully inhibited finger movement upon receiving the stop-signal.
- A distinct positive EEG potential emerged at the frontocentral scalp approximately 400 ms after the stop-signal in the prestop task.
Conclusions:
- The observed frontocentral EEG potential is linked to the interruption of motor intent.
- This neural activity reflects the revision of motor planning in the motor cortices before movement execution.
- The findings provide insights into the neural processes underlying inhibitory motor control.
