title: [The change of genioglossus muscle activity of OSAS patients with and without snoreguard].
abstract: OBJECTIVE
  The effect of snoreguard on the genioglossus (GG) muscle activity of OSAS patients was investigated.
  
  
  METHODS
  Fifteen male patients with mild to severe OSAS were diagnosed by overnight polysomnographic and GG EMG studies, and reexamined with snoreguard. GG muscle activities of these patients with and without snoreguard were compared.
  
  
  RESULTS
  The results revealed that the overnight GG muscle activity decreased significantly and the fluctuating GG muscle activity was improved effectively by the treatment of snoreguard.
  
  
  CONCLUSIONS
  The treatment mechanisms of mandibular advancing appliance on OSAS are mechanical enlargement of upper airway and the passivity of GG muscle during treatment.
authors.affiliation: Department of Stomatology, Post-Telecom General Hospital, Beijing 100032, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: X
authors.initials: X
authors.lastname: Zeng
authors.forename: M
authors.initials: M
authors.lastname: Fu
mesh_terms: D000328:Adult; D000368:Aged; D004576:Electromyography; D006801:Humans; D008297:Male; D008875:Middle Aged; D020181:Sleep Apnea, Obstructive / Q000503:physiopathology* / Q000628:therapy; D012913:Snoring / Q000517:prevention & control*