THE SIGNIFICANCE OF PROPRIOCEPTION ON POSTURAL STABILIZATION AS ASSESSED BY ISCHEMIA
THE SIGNIFICANCE OF PROPRIOCEPTION ON POSTURAL STABILIZATION AS ASSESSED BY ISCHEMIA
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DOI：
10.1016/0006-8993(84)90515-8
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发表时间：
1984-01-01
期刊：
影响因子：
2.9
通讯作者：
MAU, H
中科院分区：
文献类型：
--
作者：
DIENER, HC;DICHGANS, J;MAU, H
在双侧踝关节或大腿水平进行缺血时，研究了腿部本体感觉输入在维持人体直立姿势中的作用。通过测量随意背屈和掌屈的最大力量来确定传出神经的保存情况。通过闭眼来排除视力稳定。为了测试姿势稳定的不同频域，受试者暴露于突然的斜坡倾斜或支撑平台的正弦低频(0.3赫兹)前后位移。来自皮肤、压力和足部关节感受器的本体感觉输入(脚踝缺血)对快速位移的补偿作用不大，但当平台以低频率运动时，本体感觉输入起着重要作用。在足部缺血时，伸展的小腿三头肌的M1和M2反应以及胫前肌(M3)的晚期拮抗反应被保留下来。可逆性缺血性瘫痪或其他(尚不确定的)失稳机制肯定是大腿和正弦平台运动水平的缺血导致姿势稳定性严重下降的原因。在静态和动态条件下，腿部本体感觉输入的完全丧失都会导致病理性的1赫兹的身体震颤。
The role of proprioceptive input from the legs for the maintenance of upright human posture was investigated during ischemia bilaterally applied at the level of the ankle or the thigh. Preservation of efferent innervation was ascertained by measurements of the maximal force of voluntary dorsi- and plantarflexion. Visual stabilization was excluded by eye closure. To test different frequency domains of postural stabilization, subjects were exposed to sudden ramp tilts or to sinusoidal low frequency (0.3 Hz) anteriorposterior displacements of the supporting platform. Proprioceptive input from skin, pressure and joint receptors of the foot (ischemia at the ankle) is of minor importance for the compensation of rapid displacements, but plays a significant role when the platform moves at low frequencies. M1 and M2 responses in the stretched triceps surae and the late antagonistic response of the anterior tibial muscle (M3) are preserved with ischemia of the foot. Reversible ischemic paralysis or other (yet unidentified) mechanisms of destabilization must be responsible for the severe decrease of postural stability observed with ischemia at the level of the thigh and sinusoidal platform movements. Complete loss of the proprioceptive input from the legs leads to a pathognomic 1 Hz body tremor both under static and dynamic conditions.