Modulation of reflex contributions to ankle stiffness with perturbation velocity in normal and spastic spinal cord injured subjects

被引：0

作者：

Mirbagheri, MM ^{[1
]}

Kearney, RE ^{[1
]}

Barbeau, H ^{[1
]}

Ladouceur, M ^{[1
]}

机构：

[1] McGill Univ, Dept Biomed Engn, Montreal, PQ, Canada

来源：

CANADIAN MEDICAL AND BIOLOGICAL ENGINEERING SOCIETY, PROCEEDINGS | 1997年

关键词：

D O I：

暂无

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

A parallel-cascade system identification method was used to identify modulation of reflex contributions to dynamic ankle stiffness with position stimuli frequency in both normal subjects and spastic spinal cord injured (SCI) persons with an incomplete motor function loss. Reflex stiffness dynamics were accurately described by a linear, third-order system between half-rectified velocity and reflex torque, Reflex stiffness decreased in both normal and SCI subjects as r.m.s velocity increased; however, it was significantly higher in patients than in normal subjects at all velocities. On the other hand, normalized reflex gains of patients were well marched to those of normal subjects, implying that abnormal reflex mechanics are not due only to presynaptic inhibitory mechanisms.

引用

页码：86 / 87

页数：2

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