Effect of Trance cranial direct current stimulation on motor imagery and voluntary contraction for motoneuron excitability

2014 Fiscal Year Final Research Report

• Project/Area Number: 24650324
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Rehabilitation science/Welfare engineering
• Research Institution: Saitama Prefectural University
• Principal Investigator: HARA MOTOHIKO 埼玉県立大学, 保健医療福祉学部, 教授 (30386007)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 脊髄前角細胞興奮性 / F波 / 経頭蓋直流電気刺激 / 神経生理学

Outline of Final Research Achievements

We explored to study effect of motor imagery and voluntary contraction on F waves recorded from the first dorsal interosseous muscle using Trance cranial direct current stimulation (tDCS). 50 F waves each were recorded at rest, during motor imagery, during negative motor imagery and during voluntary contraction monitored by a force transducer to maintain the level at 10% of maximal effort under sham, cathodal tDCS (C) and anodal tDCS (A). The trial average of F-waves increased significantly during voluntary contraction from at rest in Sham, C and A. The trial average of F-waves decreased in every condition compared between S and C or A. Voluntary contraction of FDI muscle enhance the excitability of ulnar nerve anterior horn cells as evidenced by an increase of trial average of F-wave amplitudes. The effect of tDCS for MI and voluntary muscle contraction should be discussed by farther study.

Free Research Field

リハビリテーション医学