POSTURAL CONTROL IN ELDERLY SUBJECTS

被引:164
作者
PYYKKO, I
JANTTI, P
AALTO, H
机构
[1] TAMPERE CITY HOSP, DEPT GERIATR MED, TAMPERE, FINLAND
[2] INST OCCUPAT HLTH, SF-00290 HELSINKI 29, FINLAND
关键词
D O I
10.1093/ageing/19.3.215
中图分类号
R592 [老年病学]; C [社会科学总论];
学科分类号
03 ; 0303 ; 100203 ;
摘要
The postural stability of 23 subjects aged 85 years or over was studied with a force platform. The sensory function of the lower limbs was disturbed with small vibrators placed on both calf muscles and/or by placing the subjects on a platform covered with foam plastic. When compared with a group (n= 100) of 50-60-year-old subjects, the elderly subjects had significantly higher sway velocities even during non-perturbed conditions. The perturbation of muscle spindles with vibration and/or pressoreceptor function with foam plastic did not increase the postural instability of the elderly subjects. Visual deprivation had a significant effect on postural stability, and the visual influx contributed about 50% of the postural stability. Postural control is reduced as a result of loss of sensory cues of pressoreceptors and also deterioration in function of stretch reflexes initiated from muscle spindles. The very elderly seem to rely on visual control of posture; this is slow, which can be one reason for susceptibility to falls. ©1990 British Geriatrics Society.
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页码:215 / 221
页数:7
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