Changes in the Ipsilateral Motor Cortex Excitability Induced by Different Frequencies of Afferent Inputs in Healthy Subjects : A TMS Study

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概要

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• The effects of unilateral afferent inputs induced by electrical peripheral nerve stimulation (ES) at three different frequencies (1,2, and 3 Hz) on ipsilateral primary motor cortex excitability (ipsi-M1) were investigated using transcranial magnetic stimulation (TMS). In experiment 1, ES was applied to the left ulnar nerve at 1, 2, or 3 Hz, followed by TMS, which was delivered to the left M1 at inter-stimulus interval (ISI) of 25, 35, 65, or 150 ms, to reveal the suitable conduction time. In experiment 2, we investigated whether the interventional 600 ES burst at 1,2, or 3 Hz provoked plastic changes in the ipsi-M1. ISI of 35 ms was found to provoke the greatest change in ipsi-M1 excitability that depended on frequency of ES. Ipsi-M1 excitability seen in 2 Hz condition was significantly reduced as compared with that seen in the 1 and 3 Hz conditions. The interventional 600 ES burst was able to produce plastic changes in ipsi-M1 excitability. In particular, Ipsi-M1 excitability seen in the 2 Hz condition was significantly reduced as compared with that seen in 1 and 3 Hz conditions. The unilateral afferent inputs at different frequencies modulated ipsi-M1 excitability that were dependent on their frequencies.

著者

• Funase Kozo

  Human Motor Control Laboratory Graduate School Of Integrated Arts And Sciences Hiroshima University

• Uehara Kazumasa

  Human Motor Control Laboratory Graduate School Of Integrated Arts And Sciences Hiroshima University

• KUBOTA Shinji

  Human Motor Control Laboratory, Department of Human Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University

• MORISHITA Takuya

  Human Motor Control Laboratory, Department of Human Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University

• KUBOTA Shinji

  Human Motor Control Laboratory, Division of Human Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University

• HIRANO Masato

  Human Motor Control Laboratory, Division of Human Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University

• FUNASE Kozo

  Human Motor Control Laboratory, Division of Human Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University

• MORISHITA Takuya

  Human Motor Control Laboratory, Division of Human Sciences, Graduate School of Integrated Arts and Sciences, Hiroshima University:the Japan Society for the Promotion of Science

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• Asymmetry of Interhemispheric Inhibition from Active to Resting Primary Motor Cortex Induced by a Fine-motor Manipulation Task of Either Dominant or Non-dominant Hand
• O-22 Modulation of reciprocal Ia inhibition between Ia inhibitory interneurons and corticospinal neurons(The Proceedings of the 20th Annual Meetings of Japan Society of Exercise and Sports Physiology July 28・29,(Tsukuba))
• O-20 Changes in interhemispheric inhibition from active to resting primary motor cortex during a fine-motor manipulation task(The Proceedings of the 20th Annual Meetings of Japan Society of Exercise and Sports Physiology July 28・29,(Tsukuba))
• Asymmetry of Interhemispheric Inhibition from Active to Resting Primary Motor Cortex Induced by a Fine-motor Manipulation Task of Either Dominant or Non-dominant Hand
• Changes in the Ipsilateral Motor Cortex Excitability Induced by Different Frequencies of Afferent Inputs in Healthy Subjects : A TMS Study

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