title: [Effects of manipulation on mechanical properties of cervical and degree of fatigue in patients with cervical spondylosis].
abstract: OBJECTIVE
  To explore the mechanism of manipulation in treating cervical spondylosis.
  
  
  METHODS
  From August 2008 to December 2009, 65 patients with cervical spondylosis were randomly divided into manipulation group and traction group. There were 32 patients in manipulation group, of which 30 cases obtained followed-up, including 10 males and 20 females, ranging in age from 30 to 65 years,with an average of (42.31 +/- 13.23) years; the mean course of diseases was (12.40 +/- 6.23) months, and the average weight was (61.21 +/- 10.23) kg. In traction group, there were 33 patients, 30 cases obtained follow-up, including 11 males and 19 males, ranging in age from 30 to 65 years, with an average of (45.54 +/- 14.35) years; the mean course of diseases was (13.25 +/- 6.06) months and average weight was (62.31 +/- 10.45) kg. Biodex III Isokinetic Testing System and TeleMyo 2400 T Surface EMG was applied to test the mechanical properties and fatigue of neck muscles before and after treatment.
  
  
  RESULTS
  The mechanical properties of neck muscles: measuring in the 60 degrees/s and 120 degrees/s angular velocity, there were no significant difference (P > 0.05) in peak torque (PT), average power (AP), peak torque of flexor/extensor peak torque ratio (F/E) before treatment, while manipulation group was improved more than traction group in PT, AP, F/E after treatment (P < 0.05), and there was significant difference (P < 0.05). For the degree of fatigue: there was no significant difference (P > 0.05) in IEMG, MPF compared by two groups before treatment, but the manipulation group was improved more than the traction group in IEMG, MPF after treatment (P < 0.05), and there was significant difference (P < 0.05) on the right side.
  
  
  CONCLUSIONS
  Manipulation can improve contraction forces and work efficiency of neck muscle, coordination ability of flexors and extensors muscles, efficiency of neck muscle, and recover mechanical properties and can alleviate fatigue of neck muscles in patients with cervical spondylosis.
authors.affiliation: Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China. zqg.2005@yahoo.com.cn
authors.forename: Qing-Guang
authors.initials: QG
authors.lastname: Zhu
authors.forename: Min
authors.initials: M
authors.lastname: Fang
authors.forename: Guo-Quan
authors.initials: GQ
authors.lastname: Shen
authors.forename: Shu-Yun
authors.initials: SY
authors.lastname: Jiang
authors.forename: Ying-Wu
authors.initials: YW
authors.lastname: Cheng
authors.forename: Nan
authors.initials: N
authors.lastname: Zhou
mesh_terms: D000328:Adult; D001696:Biomechanical Phenomena; D002574:Cervical Vertebrae / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D020393:Manipulation, Spinal; D008516:Medicine, Chinese Traditional; D008875:Middle Aged; D009119:Muscle Contraction; D018763:Muscle Fatigue / Q000502:physiology*; D055009:Spondylosis / Q000503:physiopathology / Q000628:therapy*