THE EFFECT OF MUSCLE VIBRATION ON HUMAN POSITION SENSE DURING MOVEMENTS CONTROLLED BY LENGTHENING MUSCLE-CONTRACTION

被引:0
|
作者
INGLIS, JT [1 ]
FRANK, JS [1 ]
INGLIS, B [1 ]
机构
[1] UNIV WATERLOO,DEPT KINESIOL,WATERLOO N2L 3G1,ONTARIO,CANADA
关键词
MUSCLE VIBRATION; KINESTHESIS; LENGTHENING CONTRACTION; HUMAN; TENDON VIBRATION; SPINDLE ENDINGS; AFFERENTS; RESPONSES; DISCHARGE; CAT;
D O I
暂无
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Muscle vibration studies suggest that during voluntary movement limb position is coded by muscle spindle information derived from the lengthening, antagonist muscle. However, these investigations have been limited to movements controlled by shortening contractions. This study further examined this property of kinesthesia during movements controlled by lengthening contraction. Subjects performed a horizontal flexion of the right forearm to a mechanical stop randomly positioned at 30, 50 and 70-degrees from the starting position. The movement was performed against a flexor load (1 kg) requiring contraction of the triceps muscle. Vision was occluded and movements were performed under three conditions: no vibration, vibration of the right biceps and vibration of the right triceps. The perceived position of the right forearm was assessed by instructing subjects to simultaneously match the right limb position with the left limb. Vibration of the shortening biceps muscle had no effect on limb matching accuracy. However, triceps vibration resulted in significant overestimation of the vibrated limb position (10-13-degrees). The variability in movement distance was uninfluenced by muscle vibration. During movements controlled by lengthening contraction, there is a concurrent gamma dynamic fusimotor input that would enhance primary afferent discharge. Despite this additional regulating input to the muscle spindle, it appears that muscle spindle information from the lengthening muscle is important for the accurate perception of limb movement and/or position.
引用
收藏
页码:631 / 634
页数:4
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