Hlavacka F, Njiokiktjien C
Physiol Bohemoslov. 1986;35(1):63-70.
We studied the effect of sinusoidal stimulation of the labyrinths on postural reflexes in man, using a 0.3 Hz current of alternating polarity and +/- 1 mA intensity for stimulation. The test subjects were tested binaurally by the bipolar method (BB), with two electrodes on the mastoid processes, and binaurally by the monopolar method (BM), with electrodes localized bilaterally on the mastoid process and the hand. Stabilographic postural parameters were measured in 22 subjects in five experimental situations. Each situation lasted 60 s. Body sway, detected by astabilometer, was recorded on a Philips FM tape-recorder and then analysed off-line on a PDP-11/34 computer. On BB stimulation of the labyrinths, the variance of body sway in the left-right (LR) direction increased more than in the anteroposterior (AP) direction. In BM stimulation, only the variance of LR sway increased. Other posturographic parameters displayed a similar effect. From the aspect of body sway frequency, BB stimulation produced a peak in the course of the power spectral density of the lateral stabilogram at 0.3 Hz. In this experimental situation, a habituation effect was manifested, depending on the subject. It can be stated that binaural bipolar (BB) stimulation of the labyrinths selectively influences lateral body sway, while the increase in AP body sway in this situation is merely a concomitant phenomenon.
我们使用极性交替、强度为±1 mA的0.3 Hz电流刺激，研究了迷宫式正弦刺激对人体姿势反射的影响。测试对象通过双极法（BB）进行双耳测试，在乳突上放置两个电极，以及通过单极法（BM）进行双耳测试，电极分别位于双侧乳突和手部。在五种实验情况下，对22名受试者的姿势参数进行了测量。每种情况持续60秒。通过稳定仪检测到的身体摆动，被记录在飞利浦调频录音机上，然后在PDP - 11/34计算机上进行离线分析。在对迷宫式进行BB刺激时，身体在左右（LR）方向上摆动的方差增加幅度大于前后（AP）方向。在BM刺激中，只有LR摆动的方差增加。其他姿势描记参数也显示出类似的效果。从身体摆动频率方面来看，BB刺激在外侧稳定图的功率谱密度过程中，在0.3 Hz处产生一个峰值。在这种实验情况下，根据受试者的不同表现出了一种习惯化效应。可以说，对迷宫式的双耳双极（BB）刺激选择性地影响身体的侧向摆动，而在这种情况下AP方向身体摆动的增加仅仅是一种伴随现象。
