末梢神経切断筋の筋電図学的研究

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Using three adult mongrel dogs with the tibial nerve excised in their femoralregion, electromyographical observations were carried out on the clerxervated gastrocnemiusmuscles for 170 days after operation. The recovery processes of function on these denervatedmuscles were discussed electromyographically.The results obtained are summarized as follows.1. Denervation potentials, inc1udir?g mainly the fibril1a[ion vc>ltage and positive sharpwave, were activated most intensively in the initial stage (from tlae second to the thirdweeks) after operation. Then they decreased gradually and disappeared in the 10th weekafter denervation.2. In about the 6th week after operation when the c[enervation potentials still remainedslightly, nascent motor unit activities indicating the onset of reinnervation appearedsimultaneously. The monophasic, diphasic, or Lriph;tsic high ;tmplitude NMU voltageappeared successively after the 10th week.3. It was presumed that the regulation mechanism of the reinnervatect musczes mighthave recovered from a spinal level to a cortical level, and that it might have been completedby the spinalization originated front the training effect of tl?ese ?nuscles.4. From an electromyographical point of view, a complete fuructional recovery occurredto the reinnervated muscles later tlnan the clinical disappearance of abnormal gait.From the results olctained, it was made clear that a typical pan.tern was present for therecovery process after the excision of peripheral nerve: fibers. I he time courg0from thedenervation potentials to the reinnervation potentials, including the nascent motor unitactivity, may be available for tlac diagnosis and prognosis of periplaeral nerve ataxy inthe dog.
社団法人日本獣医学会の論文
1974-02-25

末梢神経切断筋の筋電図学的研究

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