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Transcranial Magnetic Stimulation: Decomposing the Processes Underlying Action Preparation.

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Summary

Action preparation involves cognitive control processes like competition resolution and impulse control. Motor-evoked potentials (MEPs) reveal how these processes dynamically influence the human motor system during action planning.

Keywords:
action preparationaction selectiondecision makingmotor cortexmotor excitabilitymotor inhibitionmovementpremotor cortex

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Motor Control

Background:

  • Action preparation relies on cognitive control mechanisms.
  • These mechanisms include competition resolution and impulse control.
  • Understanding motor system dynamics during preparation is crucial.

Purpose of the Study:

  • To review how motor-evoked potentials (MEPs) study motor system changes during action preparation.
  • To explore the role of cognitive control in action selection and execution.
  • To demonstrate MEPs as physiological readouts for distinct control processes.

Main Methods:

  • Utilizing transcranial magnetic stimulation (TMS) to elicit motor-evoked potentials (MEPs).
  • Measuring MEPs over the contralateral primary motor cortex (M1).
  • Analyzing MEPs to infer state-changes in the motor system.

Main Results:

  • MEPs provide physiological fingerprints of motor system activity.
  • MEPs help decompose dynamic and effector-specific influences during action preparation.
  • MEPs reveal the impact of competition resolution, conflict, and impulse control.

Conclusions:

  • MEPs are valuable physiological readouts for studying action preparation.
  • Distinct cognitive control processes influence the motor system during action planning.
  • MEPs facilitate the decomposition of overlapping control influences on motor behavior.