Interaction between finger opposition movements and aftereffects of 1Hz-rTMS on ipsilateral motor cortex

  • Avanzino L
  • Bove M
  • Tacchino A
 et al. 
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One-hertz repetitive transcranial magnetic stimulation (1Hz-rTMS) over ipsilateral motor cortex is able to modify up to 30 min the motor performance of repetitive finger opposition movements paced with a metronome at 2 Hz. We investigated whether the long-lasting rTMS effect on motor behavior can be modulated by subsequent engagement of the contralateral sensorimotor system. Motor task was performed in different experimental conditions: immediately after rTMS, 30 min after rTMS, or when real rTMS was substituted with sham rTMS. Subjects performing the motor task immediately after rTMS showed modifications in motor behavior < or =30 min after rTMS. On the other hand, when real rTMS was substituted with sham stimulation or when subjects performed the motor task 30 min after the rTMS session, the effect was no longer present. These findings suggest that the combination of ipsilateral 1Hz-rTMS and voluntary movement is crucial to endure the effect of rTMS on the movement itself, probably acting on synaptic plasticity-like mechanism. This finding might provide some useful hints for neurorehabilitation protocols.

Author-supplied keywords

  • Adult
  • Analysis of Variance
  • Electric Stimulation
  • Electromyography
  • Evoked Potentials: Motor
  • Female
  • Fingers
  • Functional Laterality
  • Humans
  • Male
  • Motor Cortex
  • Movement
  • Psychomotor Performance
  • Time Factors
  • Transcranial Magnetic Stimulation

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  • L Avanzino

  • M Bove

  • A Tacchino

  • C Trompetto

  • C Ogliastro

  • G Abbruzzese

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