Changes in sensory reweighting of proprioceptive information during standing balance with age and disease

被引:53
作者
Pasma, J. H. [1 ]
Engelhart, D. [2 ]
Maier, A. B. [3 ]
Schouten, A. C. [2 ,4 ]
van der Kooij, H. [2 ,4 ]
Meskers, C. G. M. [5 ]
机构
[1] Leiden Univ, Med Ctr, Dept Rehabil Med, NL-2300 RC Leiden, Netherlands
[2] Univ Twente, Inst Biomed Technol & Tech Med MIRA, Lab Biomech Engn, NL-7500 AE Enschede, Netherlands
[3] Vrije Univ Amsterdam, Med Ctr, Dept Internal Med, Sect Gerontol & Geriatr, Amsterdam, Netherlands
[4] Delft Univ Technol, Dept Biomech Engn, Delft, Netherlands
[5] Vrije Univ Amsterdam, Med Ctr, Dept Rehabil Med, Amsterdam, Netherlands
关键词
standing balance; elderly; system identification techniques; sensory reweighting; proprioception; POSTURAL CONTROL; ANKLE STIFFNESS; OLDER-ADULTS; VISION; STRATEGIES; STABILITY; HEALTHY; YOUNG; EPIDEMIOLOGY; INTEGRATION;
D O I
10.1152/jn.00414.2015
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
With sensory reweighting, reliable sensory information is selected over unreliable information during balance by dynamically combining this information. We used system identification techniques to show the weight and the adaptive process of weight change of proprioceptive information during standing balance with age and specific diseases. Ten healthy young subjects (aged between 20 and 30 yr) and 44 elderly subjects (aged above 65 yr) encompassing 10 healthy elderly, 10 with cataract, 10 with polyneuropathy, and 14 with impaired balance, participated in the study. During stance, proprioceptive information of the ankles was disturbed by rotation of the support surface with specific frequency content where disturbance amplitude increased over trials. Body sway and reactive ankle torque were measured to determine sensitivity functions of these responses to the disturbance amplitude. Model fits resulted in a proprioceptive weight (changing over trials), time delay, force feedback, reflexive stiffness, and damping. The proprioceptive weight was higher in healthy elderly compared with young subjects and higher in elderly subjects with cataract and with impaired balance compared with healthy elderly subjects. Proprioceptive weight decreased with increasing disturbance amplitude; decrease was similar in all groups. In all groups, the time delay was higher and the reflexive stiffness was lower compared with young or healthy elderly subjects. In conclusion, proprioceptive information is weighted more with age and in patients with cataract and impaired balance. With age and specific diseases the time delay was higher and reflexive stiffness was lower. These results illustrate the opportunity to detect the underlying cause of impaired balance in the elderly with system identification.
引用
收藏
页码:3220 / 3233
页数:14
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