title: [The study of facial neurapraxia].
abstract: OBJECTIVE
  To study the clinical characteristics and mechanism of facial neurapraxia.
  
  
  METHODS
  Patients were tested with nerve excitability method and judged the degree of facial paralysis. Animal mode of neurapraxia was made and threshold of evoked electromyographic potential was tested. The fibers of facial nerve were observed under transmission electromicroscope.
  
  
  RESULTS
  Average restoration time of evoked electromyographic potential was 52.5 min. The lamellar separation of myelin sheath of facial nerve was found under electromicroscope. Patients with facial neurapraxia was judged as denervation negative and residual function of facial muscles was above 65%.
  
  
  CONCLUSIONS
  Facial neurapraxia is mild reversible facial paralysis and relevant to the lamellar separation.
authors.affiliation: Department of Otolaryngology, First Affiliated Hospital, China Medical University, Shenyang 110001.
authors.forename: A H
authors.initials: AH
authors.lastname: Yan
authors.forename: L
authors.initials: L
authors.lastname: Hui
authors.forename: Y
authors.initials: Y
authors.lastname: Shi
authors.forename: Z
authors.initials: Z
authors.lastname: Ren
authors.forename: L
authors.initials: L
authors.lastname: Xie
mesh_terms: D000818:Animals; D003714:Denervation; D004576:Electromyography; D005154:Facial Nerve / Q000648:ultrastructure*; D005158:Facial Paralysis / Q000503:physiopathology*; D005260:Female; D006168:Guinea Pigs; D006801:Humans; D008297:Male