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Παρασκευή 30 Μαρτίου 2018

O-1-24. Cortical silent period during force control task

We investigated whether transcranial magnetic stimulation (TMS)-induced cortical silent period (cSP), which reflects activation of the GABAergic inhibitory neural circuit in the primary motor cortex (M1), was modulated with dependency on actual output force and corticospinal excitability. Eleven healthy participants were asked to control the force of abduction of the right index finger to 10–100% of the maximum voluntary contraction. TMS was delivered to the left M1 during the task. The results showed that actual output force level, background electromyography activity (bEMG) and area of motor evoked potential (aMEP) in the right first dorsal interosseous muscle gradually increased with increasing target force level while cSP gradually decreased with increasing target force level.

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