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Effect of desynchronized inputs on compound sensory and muscle action potentials
Author(s) -
Kimura Jun,
Sakimura Yoko,
Machida Masafumi,
Fuchigami Yasunori,
Ishida Tetsuro,
Claus Detlef,
Kameyama Shigeki,
Nakazumi Yuji,
Wang Jin,
Yamada Thoru
Publication year - 1988
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.880110705
Subject(s) - compound muscle action potential , wrist , sensory system , median nerve , electrophysiology , stimulation , thenar eminence , latency (audio) , anatomy , evoked potential , neuroscience , medicine , chemistry , audiology , biology , computer science , telecommunications
Stimulation of the second (S 1 ) or third (S 2 ) digit elicits a median sensory potential at the wrist. Similarly, a shock applied to the median ( S m ) or ulnar ( S u ) nerve at the wrist evokes a sensory potential of the fourth digit and a muscle potential over the thenar eminence. Hence, a concomitant application of S 1 and S 2 or S m and S u with varying interstimulus intervals simulates the effect of desynchronized inputs. In 10 hands, a shift in latency on the order of 1 msec between S 1 and S 2 or S m and S u caused a major reduction in sensory potential by as much as 30–40% but little change in muscle action potential. A latency difference slightly less than one‐half the total duration of unit discharge maximized the phase cancellation between the two components and consequently the loss of area under the wave‐form.