Noda T, Nakajima S, Sasano T, Shigeno K
Department of Otolaryngology, Nagasaki University School of Medicine, Japan.
Acta Otolaryngol Suppl. 1993;503:191-3. doi: 10.3109/00016489309128106.
Retro-auricular galvanic stimulation in Romberg's posture elicits body sway which consists of an initial response (IR) and a deviation response (DR). Generally, anodal stimulation of the right side elicits IR to the left and DR to the right. We measured the deviation response (VDR) in various conditions in normal subjects. There was no significant difference between mean VDR in the standing posture weighted on the left foot (0.49 +/- 0.17 cm) and on the right foot (0.39 +/- 0.20 cm). Stimulation in the squatting posture also elicited IR to the left and DR to the right. Stimulation of the right side produced DR backward and to the right in the condition of the head facing to the right, and forward and to the right in the condition of the head facing to the left. The same body sway response as the after galvanic stimulation was also induced by non-galvanic maneuvers like inclining the head or moving the finger. Anodal stimulation in the sitting posture elicited slight but apparent head inclination to the stimulated side. These results suggest that cervical muscles play an important role in the galvanic body sway test (GBST), viz. IR and DR seemed to be secondarily produced by changes in the muscular tension of the neck.
在闭目直立姿势下进行耳后电刺激会引发身体摆动，该摆动由初始反应（IR）和偏差反应（DR）组成。一般来说，右侧的阳极刺激会引发向左的初始反应和向右的偏差反应。我们在正常受试者的各种条件下测量了偏差反应（VDR）。在左脚负重的站立姿势下的平均VDR（0.49±0.17厘米）和右脚负重的站立姿势下的平均VDR（0.39±0.20厘米）之间没有显著差异。蹲姿下的刺激也会引发向左的初始反应和向右的偏差反应。在头部朝右的情况下，右侧刺激会使偏差反应向后且向右，而在头部朝左的情况下，偏差反应向前且向右。像头部倾斜或手指移动等非电刺激操作也会引发与电刺激后相同的身体摆动反应。坐姿下的阳极刺激会引发向刺激侧的轻微但明显的头部倾斜。这些结果表明，颈部肌肉在电刺激身体摆动测试（GBST）中起重要作用，即初始反应和偏差反应似乎是由颈部肌肉张力的变化继发产生的。
