ELECTROPHYSIOLOGICAL STUDY ON THE PATHOLOGY OF SYNKINESIS AFTER FACIAL-NERVE PARALYSIS

By conducting electrophysiological tests on patients with facial nerve paralysis, the characteristics of synkinesis and the mechanisms of it s manifestations were examined. The subjects were 114 patients of faci al nerve paralysis on whom electroneurography (ENoG) and the blink ref lex were conducted. As a result, it was indicated that synkinesis coul d be determined by the blink reflex, and that the frequency of synkine sis manifestation increased with severity of paralysis. From examinati on during the latent period, early component (S1) recognized in the ca ses of synkinesis was found to be the waveform which passed the fibers with a slow conducting speed. It was not related to the degree of deg eneration of nerves for either the severe or light degeneration of ner ves. From the above result it was concluded that synkinesis is generat ed as a misdirection of reproduced nerves.