実運動中におこなう運動イメージではイメージ内容を指定することで運動の正確度は向上する

• Published in: 関西理学療法 Vol. 22; pp. 75 - 80
• Main Authors: 鈴木, 俊明, 鶴田, 菜月
• Format: Journal Article
• Language: Japanese
• Published: 関西理学療法学会 2022
• Subjects: actual movement; F-waves; motor image; movement accuracy
• ISSN: 1346-9606; 1349-9572
• DOI: 10.11354/jkpt.22.75

This study examined the effects of motor imagery and real movement on the excitability of spinal nerve function and its impact on movement accuracy, for a specific image. Fifteen healthy adults (mean age, 25.9 years) participated in this study. They practiced adjusting their pinch force (motor practice) to 20% maximum voluntary contraction (MVC). Initially, the MVC of the participants was adjusted to 20% without visual feedback. Then, they performed three types of motor imagery tasks simultaneously with the real movement. After the motor practice and each imagery task, the subjects’ adjusted 20% MVC pinch forces were compared, and the rate of absolute error was calculated. The three tasks were: a free image task (Task 1), a force image task (Task 2), and a hand image task (Task 3). F-waves were recorded during the motor practice and Tasks 1–3. The F-waves and the rate of absolute error were significantly lower in Task 2 than in the motor practice. Concentrating on muscular sensory information promotes motor learning, while decreasing the rate of absolute error and suppressing F-waves.