Vibration stimulation during non-fatiguing tonic contraction induces outlasting neuroplastic effects.
作者： M. Christova , D. Rafolt , W. Mayr , B. Wilfling , E. Gallasch
DOI: 10.1016/J.JELEKIN.2010.03.001
关键词:
摘要: Abstract The objective was to explore if vibration superposed tonic contraction induces plastic changes in the contra- and ipsilateral motor cortex. Healthy subjects ( n =12) abducted right index finger with a force 5% of maximal voluntary (MVC) against lever torque while 60Hz stimulus 10min delivered. Motor evoked potentials (MEPs) after single paired-pulse transcranial magnetic stimulation (TMS) were recorded from first dorsal interosseous muscle left hand pre, during, post 30min post-stimulation. TMS assessments employed alone (TONIC) vibrostimulation (VIBRO), each for ipsi- contralateral cortex separately. In cortex: resting threshold (rMT) decreased, MEP amplitudes increased, short-interval intracortical inhibition (SICI) reduced facilitation (ICF) increased VIBRO, no occurred TONIC. rMT amplitude SICI during TONIC, VIBRO. Vibration contraction, lasting (30min) changes, whereas caused outlasting effects. Mainly intrinsic mechanisms are involved because spinal adaptation could be excluded F -wave assessments). These findings have therapeutic potential functional recovery deficits robot-aided devices.
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