実運動と同時におこなう運動イメージが脊髄運動神経機能の興奮性と運動の正確性に与える影響

Scale 4 of the Kinesthetic and Visual Imagery Questionnaire（KVIQ4）の検討

抄録

This study examined the effect of performing motor imagery (MI) simultaneously with movement on the excitability of the spinal nerve function and its impact on movement accuracy. Twelve healthy subjects (mean age, 20.9 years) who completed Scale 4 of the Kinesthetic and Visual Imagery Questionnaire participated in this study. After resting (rest), the subjects practiced adjusting pinch forces at 20% maximum voluntary contraction (MVC) using visual feedback (motor practice [MP]). Next, the subjects adjusted for 20% MVC without visual feedback (pinch task 1) and performed MI. Then they performed pinch task 1 again (pinch task 2), MI simultaneous with the actual movement using visual feedback (MP+MI), and pinch task 1 again (pinch task 3). Finally, they rested again (rest 2). F-waves were recorded at rest, MP, MI, MP+MI, and rest 2. Movement accuracy was assessed during pinch tasks 1–3. Spinal nerve function excitability was significantly increased in MP, MI, and MP+MI compared with rest and rest 2. Movement accuracy was increased in pinch task 3 compared with pinch task 1. High MI ability and MI simultaneous with movement increased spinal nerve function excitability and improved movement accuracy.