MUSCLE-FIBER RECOVERY FUNCTIONS STUDIED WITH DOUBLE PULSE STIMULATION

被引：64

作者：

MIHELIN, M ^{[1
]}

TRONTELJ, JV ^{[1
]}

STALBERG, E ^{[1
]}

机构：

[1] UNIV HOSP UPPSALA,DEPT CLIN NEUROPHYSIOL,UPPSALA,SWEDEN

来源：

MUSCLE & NERVE | 1991年 / 14卷 / 08期

关键词：

MUSCLE FIBER PROPAGATION VELOCITY; SINGLE FIBER ELECTROMYOGRAPHY; VELOCITY RECOVERY FUNCTION; MUSCULAR DYSTROPHY; DENERVATION;

D O I：

10.1002/mus.880140808

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

Direct electrical stimulation with paired pulses at varied intervals was used to study the propagation velocity and action potential amplitude recovery functions (VRF and ARF) of single muscle fibers. Following a subnormal period with slowed conduction, most of the muscle fibers tested in healthy subjects showed a period of supernormal propagation velocity starting at 3 to 12 ms, with a peak between about 5 and 15 ms, a mean increase of 7%, and an approximately logarithmic decay toward 1 second. The onset of supernormality was earlier in muscle fibers from patients with muscular dystrophy and significantly delayed in those from denervated muscles. Denervated muscle fibers also had a significantly longer refractory period.

引用

页码：739 / 747

页数：9

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