Aiello I, Rosati G, Sau G F, Patraskakis S, Bissakou M, Traccis S
Neurological Clinic, Sassari University, Italy.
J Neurol Sci. 1989 Nov;93(2-3):191-8. doi: 10.1016/0022-510x(89)90189-5.
Static vestibular influences on upper limb flexor tone were studied in man by analyzing the changes in flexor carpi radialis H reflex area with lateral tilting of the longitudinal body axis. Ten healthy volunteers and 2 labyrinthine defective patients were tested in an experimental situation designed to minimize all afferent inputs except vestibular ones. Each subject was seated on a chair which could be tilted laterally to the left or the right from the vertical. Head and trunk were fixed upright, upper and lower limbs in half-flexed position and forearm in an intermediate position between supination and pronation. Lateral tilting was applied at random from the vertical (0 degrees control position) to left and right (4 degrees, 8 degrees, 12 degrees, 16 degrees, 20 degrees test positions). Each test position was followed by a return to 0 degrees and in each control and test position 20 consecutive H reflexes were recorded. The data observed in the normal subjects showed flexor tone inhibition in the arm which was tilted downwards and facilitation in the contralateral arm. These findings suggest that in man, like in animals, labyrinth reflexes act asymmetrically and in the opposite direction to neck reflexes.
通过分析随着身体纵轴向一侧倾斜，桡侧腕屈肌H反射区域的变化，对人体静态前庭对上肢屈肌肌张力的影响进行了研究。在一个旨在尽量减少除前庭传入之外的所有传入输入的实验情境中，对10名健康志愿者和2名迷路功能缺陷患者进行了测试。每个受试者坐在一把椅子上，椅子可从垂直方向向左或向右侧倾斜。头部和躯干保持直立，上肢和下肢处于半屈曲位，前臂处于旋前和旋后之间的中间位置。从垂直方向（0度控制位）随机向左侧和右侧倾斜（4度、8度、12度、16度、20度测试位）。每个测试位之后返回0度，在每个控制位和测试位记录20个连续的H反射。在正常受试者中观察到的数据显示，向下倾斜一侧的手臂屈肌肌张力受到抑制，对侧手臂则出现易化。这些发现表明，在人体中，如同在动物中一样，迷路反射的作用是不对称的，且与颈部反射方向相反。
