神経障害の程度よりみた末梢性顔面神経麻痺回復の条件

概要

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This study was intended to know to what extent of the peripheral nerve injury does completely recover and whether the nerve fibers which once degenerated and afterwards regenerated have normal neuro-muscular function or not in the peripheral facial nerve of the rabbit.In the experiment, the state of the recovery from facial paly and the state of the regeneration of the nerve fibers were investigated by observing the movement of M. orbicularis oris at the time of food intake, as well as by measuring the evoked wave and the degree of muscle contraction induced by nerve or muscle stimulation.The conclusions obtained were as follows:1) The peripheral facial nerve palsy recovers completely in a short period following a nerve impairment if over a half of nerve fibers maintain intact without degeneration.2) After sectioning and suturing the nerve fibers, they regenerate to some extent, but the neuro-muscular system of these regenerated nerves has no normal function.3) When the nerve is crushed, over a half of nerve fibers do not degenerate, and consequently the nerve palsy recovers shortly.
社団法人日本耳鼻咽喉科学会の論文