摘要
目的:探讨正常人直立于坚硬平板和海绵垫时,视觉、本体觉和前庭觉在维持姿势平衡中的整合作用。方法:106名正常人分别站立于坚硬平板和海绵垫上,每种站立在平面条件下,睁眼和闭眼各站立30s。分别记录不同感觉干扰条件下足底压力中心平均晃动速度(SV),作为姿势稳定性的参数,并定量分析视觉、本体觉和前庭觉在维持姿势平衡中的整合作用。结果:①在视觉或(和)本体觉受到干扰时,SV均增加,其差异有统计学意义(P<0.01);②当本体觉未被干扰及被干扰时,视觉条件的变化引起SV增加程度分别是(12.12±6.19)%和(30.58±9.69)%;当视觉条件未被干扰及被干扰时,本体觉变化导致的SV增加程度分别是(18.31±6.56)%和(36.25±8.90)%;而当视觉和本体觉同时受到干扰时,SV增加程度是(46.21±8.67)%;③在姿势平衡中起作用较大的是前庭觉,其次是本体觉和视觉,三者呈非线性关系。结论:利用海绵垫干扰本体觉,结合姿势描记可以记录不同感觉条件下姿势稳定性,并可定量分析视觉、本体觉和前庭觉在姿势平衡中的整合作用;人体维持平衡过程中,应用3种外周感觉的姿势策略差异较大;当1种或2种外周感觉信息被干扰时,中枢神经系统为维持姿势稳定,存在复杂的感觉整合机制。
Objective：To investigate the sensory organization in the postural stability under sensory conflict induced by standing foam surface in normal individuals. Method： One hundred and six normal subjects were tested using the computerized posturography under the firm surface and foam surface with eye open and eye closed for 30 seconds respectively. The standing foam surface was to interrupt the somatosensory and closing eyes was to interrupt the visual input in the postural stability. The sway velocity （SV） of body under different sensory conflict condition was recorded as parameter of postural stability and the effect of organization between the vestibular, visions and somatosensory was analyzed quantitatively. Result：① The SV decreased when the visual cue or/and somatosensory cue be interrupted （ P 〈0.01）; ② The decreased degrees of SV induced by the change of visual cue were （12.12±6.1） % and （30.58±9.69）% when the somatosensory cue be interrupted or not. The decreased degrees of SV induced by the change of somatosensory cue were （18.31±6.56）% and （36.25±8. 90）% when the visual cue be interrupted or not. The decreased degrees of SV induced by the change of both somatosensory and visual cue were （46.21±8.67）% ; ③ The most important sensory input for keeping balance is vestibular cue , followed by the somatosensory and visual cues and the relationship among these three sensory is nonlinear. Conclusion： Through recording the postural stability quantitatively under different conditions of sensory conflict induced by standing foam surface or closing eyes, it is possible to evaluate the sensory organization of the three kinds of sensory input including the visual, somatosensory, and vestibular input in postural control. It exist the various balance strategy for keeping postural stability under sensory conflict in normal subjects. When one or two sensory input was interrupted in the static balance, the center nervous system has a complicated mechanism of sensory organization to keep balance even in the normal subject.
出处
《临床耳鼻咽喉头颈外科杂志》
CAS
CSCD
北大核心
2007年第4期162-165,共4页
Journal of Clinical Otorhinolaryngology Head And Neck Surgery
基金
卫生部临床学科重点项目(No:2004)
国家自然科学基金(No:30471878)
国家杰出青年基金资助项目(No:39925035)
国家科技部"十五"攻关计划(No:2004BA720A18-02)
教育部高等学校博士学科点专项科研基金(No:2002173)
关键词
平衡
姿势描记
海绵
视觉
本体觉
前庭
Equilibrium
Posturography,foam
Vision
Somatosensory
Vestibular
