双关节弹道式手臂运动。

Two joints ballistic arm movements.

作者信息

Accornero N, Berardelli A, Argenta M, Manfredi M

出版信息

Neurosci Lett. 1984 Apr 20;46(1):91-5. doi: 10.1016/0304-3940(84)90204-0.

Abstract

Fast planar arm movements involving two joints have been analyzed in humans. The EMG activity associated with the drawing of straight lines or geometric figures was characterized by sequences of bursts in the agonist and antagonist muscles of constant duration and different amplitude. The shape of each trajectory is defined by a particular sequence of burst activity in the four muscles studied. A pattern of one burst in the agonist and one in the antagonist is the basic building block for different kinds of ballistic trajectories. The time of execution increased linearly with the number of sides of the geometric figures by steps of about 210 ms and did not increase linearly with their size.

摘要

在人体中已经对涉及两个关节的快速平面手臂运动进行了分析。与绘制直线或几何图形相关的肌电图活动的特征是，在具有恒定持续时间和不同幅度的主动肌和拮抗肌中出现一连串的爆发。每个轨迹的形状由所研究的四块肌肉中特定的爆发活动序列定义。主动肌中的一次爆发和拮抗肌中的一次爆发模式是不同类型弹道轨迹的基本组成部分。执行时间随着几何图形边数的增加以约210毫秒的步长呈线性增加，并且不随其大小呈线性增加。