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Related Concept Videos

Action Potential01:14

Action Potential

Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...

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Assessing Corticospinal Excitability During Goal-Directed Reaching Behavior
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Touch-Related Electrophysiology Activity Promotes Human Movements Initiation.

Yuting Tang, Houmin Wang, Xiaotong Zhang

    IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
    |July 6, 2026
    PubMed
    Summary
    This summary is machine-generated.

    Tactile input, including self-touch, significantly speeds up movement initiation by enhancing corticospinal excitability. This touch-based facilitation improves reaction time and sensorimotor transformation, offering potential for motor rehabilitation.

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    Area of Science:

    • Neuroscience
    • Motor Control
    • Somatosensory System

    Background:

    • Touch is known to improve motor performance.
    • The precise effects of touch on movement initiation and its neural underpinnings require further investigation.

    Purpose of the Study:

    • To investigate the influence of different touch types on movement initiation.
    • To elucidate the neurophysiological mechanisms underlying touch-evoked motor facilitation.

    Main Methods:

    • Utilized a tactile Go/No-Go Task with varying touch conditions (self-touch, object-touch, other-touch).
    • Employed multimodal neurophysiological assessments including Transcranial Magnetic Stimulation (TMS), Electroencephalography (EEG), and somatosensory behavioral measures.

    Main Results:

    • All touch types reduced reaction time (RT), with self-touch showing the most pronounced effect.
    • TMS revealed increased corticospinal excitability (CSE) and reduced intracortical inhibition.
    • EEG and somatosensory measures indicated enhanced somatosensory processing, including increased somatosensory evoked potential (SEP) amplitudes and reduced somatosensory temporal discrimination thresholds (STDTs).

    Conclusions:

    • Tactile input, particularly self-touch, enhances movement initiation by modulating somatosensory processing and promoting corticospinal readiness.
    • These findings suggest touch facilitates sensorimotor transformation and has implications for developing touch-based motor rehabilitation strategies.