title: Accessory nerve function in lateral selective neck dissection with undissected level IIb.
abstract: BACKGROUND
  To investigate the accessory nerve function in lateral selective neck dissections (LSND) performed in laryngeal squamous cell carcinoma patients without dissection of level IIB.
  
  
  METHODS
  Fifteen LSND were performed in 11 N0 laryngeal carcinoma patients with preservation of level IIB. Distal latencies, compound muscle action potentials (CMAP), and electromyography findings were investigated before surgery, during the 3rd postoperative week, and 3 months thereafter to compare the effects of the procedure on the accessory nerve.
  
  
  RESULTS
  Distal latencies and CMAP values were significantly lower in the early and late postoperative periods when compared with preoperative values. In 8 patients, there was no motor unit potential (MUP) in the early postoperative period. However, in the late postoperative period, there was no MUP loss.
  
  
  CONCLUSIONS
  Only temporary functional deterioration of the accessory nerve was seen in patients in whom LSND was performed with undissected level IIB.
authors.affiliation: Department of Otorhinolaryngology, Gazi University School of Medicine, Ankara, Turkey. akoybasi@gazi.edu.tr
authors.forename: Ahmet
authors.initials: A
authors.lastname: Koybaşioğlu
authors.forename: Ayşe
authors.initials: A
authors.lastname: Bora Tokçaer
authors.forename: Erdoğan
authors.initials: E
authors.lastname: Inal
authors.forename: Sabri
authors.initials: S
authors.lastname: Uslu
authors.forename: Tuğba
authors.initials: T
authors.lastname: Koçak
authors.forename: Ahmet
authors.initials: A
authors.lastname: Ural
mesh_terms: D000055:Accessory Nerve / Q000503:physiopathology*; D000200:Action Potentials; D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000601:surgery*; D016009:Chi-Square Distribution; D004576:Electromyography; D005260:Female; D006801:Humans; D007822:Laryngeal Neoplasms / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D037981:Neck Dissection / Q000379:methods*; D009431:Neural Conduction / Q000502:physiology