Levin O, Steyvers M, Wenderoth N, Li Y, Swinnen S P
Motor Control Laboratory, Department of Kinesiology, Group Biomedical Sciences, Katholieke Universiteit Leuven, Tervuurse Vest 101, 3001 Heverlee, Belgium.
Neurosci Lett. 2004 Apr 15;359(3):185-9. doi: 10.1016/j.neulet.2004.01.070.
This study explored the dynamical changes in corticospinal excitability during the imagination of cyclical unimanual and bimanual wrist flexion-extension movements. Transcranial magnetic stimulation was applied over the left motor cortex to evoke motor evoked potentials in the right wrist flexor and extensor muscles. Findings provided evidence for increased reciprocal excitability changes during imagery of symmetrical in-phase movements as compared to asymmetrical (anti-phase) or unimanual movements. This suggests that in-phase movements may reinforce whereas anti-phase movements may reduce the temporal representation of the task in the corticospinal motor networks of the brain.
本研究探讨了在想象周期性单腕和双腕屈伸运动过程中皮质脊髓兴奋性的动态变化。经颅磁刺激施加于左侧运动皮层，以诱发右侧腕屈肌和伸肌的运动诱发电位。研究结果表明，与不对称（反相）或单腕运动相比，在对称同相运动的想象过程中，相互兴奋性变化增加。这表明同相运动可能会加强，而反相运动可能会减少大脑皮质脊髓运动网络中任务的时间表征。
