両側反回神経麻痺の筋病理

抄録

Five cases of bilateral vocal cord paralysis with dyspnea were treated by the method of submucous resection of vocal cord.
The obtained thyroarytenoid muscles were studied under both light and electron microscope.
Normal structure of muscle fibers and neuromuscular junctions was observed in all materials. Between the muscle fibers, the small-calibered myelinated nerve fibers with double-layered basal lamina were often encountered. Those findings suggest that the regeneration of recurrent nerve occurs and the regenerated intrinsic laryngeal muscles may shift the paralyzed vocal cords to more adducted position causing dyspnea consequently.