[Study on pathogenic mechanism of hemifacial XXXX ].

@entity17 @entity75 @entity3303 @entity2473 @entity468 @entity528 @entity3457
In 17 @entity468 , areas of focal injury were induced in the facial nerve root near the brain stem by implantation of V-clamp and catgut suture. The electrophysiological examinations were made at 3 weeks after the surgery. When the mandibular branch of the facial nerve was electrically stimulated, a combined @entity3457 potential and a delayed @entity3457 could be recorded from the orbicular ocular branch of the facial nerve. The delayed @entity3457 disappeared after the motornucleu of the facial nerve was blocked with injection of 2% @entity3303 (1.5 microliter). These phenomena suggests that the artifacial synapses have been formed among the demyelinating facial nerve. The antidromic impulse of the mandibular branch of the facial nerve spread to adjacent fibers through the artifacial synapses in REZ of the facial nerve and causes the synkinases and @entity2473 . Delayed @entity3457 may be caused by neurons of the motornucleu. @entity75 was also examined histologically at 3 weeks following implantation. Injured nerve showed areas of @entity17 and @entity528 of adjacent axons. The Nissle substances at the neurons of the motornucleu were dissolved and disappeared.
