title: Efficacy of 904 nm gallium arsenide low level laser therapy in the management of chronic myofascial pain in the neck: a double-blind and randomize-controlled trial.
abstract: OBJECTIVE
  A prospective, double-blind, randomized, and controlled trial was conducted in patients with chronic myofascial pain syndrome (MPS) in the neck to evaluate the effects of infrared low level 904 nm Gallium-Arsenide (Ga-As) laser therapy (LLLT) on clinical and quality of life (QoL).
  
  
  METHODS
  The study group consisted of 60 MPS patients. Patients were randomly assigned to two treatment groups: Group I (actual laser; 30 patients) and Group II (placebo laser; 30 patients). LLLT continued daily for 2 weeks except weekends. Follow-up measures were evaluated at baseline, 2, 3, and 12 weeks. All patients were evaluated with respect to pain at rest, pain at movement, number of trigger points (TP), the Neck Pain and Disability Visual Analog Scale (NPAD), Beck depression Inventory (BDI), and the Nottingham Health Profile (NHP).
  
  
  RESULTS
  In active laser group, statistically significant improvements were detected in all outcome measures compared with baseline (P < 0.01) while in the placebo laser group, significant improvements were detected in only pain score at rest at the 1 week later of the end of treatment. The score for self-assessed improvement of pain was significantly different between the active and placebo laser groups (63 vs. 19%) (P < 0.01).
  
  
  CONCLUSIONS
  This study revealed that short-period application of LLLT is effective in pain relief and in the improvement of functional ability and QoL in patients with MPS.
authors.affiliation: Physical Medicine and Rehabilitation, School of Medicine, Dicle University, Diyarbakir, Turkey. alig@dicle.edu.tr
authors.forename: Ali
authors.initials: A
authors.lastname: Gur
authors.forename: Aysegul Jale
authors.initials: AJ
authors.lastname: Sarac
authors.forename: Remzi
authors.initials: R
authors.lastname: Cevik
authors.forename: Ozlem
authors.initials: O
authors.lastname: Altindag
authors.forename: Serdar
authors.initials: S
authors.lastname: Sarac
mesh_terms: D000328:Adult; D002908:Chronic Disease; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D028022:Low-Level Light Therapy / Q000295:instrumentation*; D008297:Male; D009209:Myofascial Pain Syndromes / Q000532:radiotherapy*; D009333:Neck; D011446:Prospective Studies; D011788:Quality of Life; D020127:Recovery of Function; D016896:Treatment Outcome