Kasai T, Kawanishi M, Yahagi S
Department of Human Movement Studies, Faculty of Integrated Arts and Sciences, Hiroshima University, Japan.
Percept Mot Skills. 1994 Feb;78(1):43-7. doi: 10.2466/pms.1994.78.1.43.
The effect of upper limb muscle tendon vibration during alternating step flexion-extension movements about the wrist was studied in 6 normal humans. A vibrator was mounted over either the wrist flexor muscle or the elbow flexor and extensor muscles. Vibration was applied either to a single muscle or simultaneously to both muscles during wrist flexion-extension movements. After a period of practice, subjects learned the required movements and were able to make them with their eyes closed. Simultaneous application of subthreshold vibration to the wrist flexor and the elbow extensor or flexor muscles during extension movements produced an undershooting of the required end-movement position. The observed results indicated the pattern of transjoint projections from elbow extensor and flexor muscles to motoneurons supplying wrist extensor and flexor muscles. It is also suggested that those transjoint projections play an important role in coordinated movement of wrist and elbow joints.
在6名正常人中研究了在腕关节交替屈伸运动过程中上肢肌腱振动的影响。将一个振动器安装在腕屈肌或肘屈肌及伸肌上。在腕关节屈伸运动期间，振动可单独施加于一块肌肉，也可同时施加于两块肌肉。经过一段时间的练习，受试者学会了所需的动作，并能够闭着眼睛完成这些动作。在伸展运动期间，对腕屈肌和肘伸肌或屈肌同时施加阈下振动会导致所需的终末运动位置出现下冲。观察结果表明了从肘伸肌和屈肌到支配腕伸肌和屈肌的运动神经元的关节间投射模式。还表明这些关节间投射在腕关节和肘关节的协调运动中起重要作用。
