title: Relationship between cross sectional area of Longus Colli muscle and pain laterality in patients with cervicogenic headache.
abstract: OBJECTIVE
  Cervicogenic headache (CGH) originated from impaired cervical musculoskeletal structures. Dysfunction of deep neck flexor muscles has been reported in CGH subjects. The purpose of this study was to assess relationship between the size of these muscles and headache laterality in CGH subjects.
  
  
  METHODS
  A cross sectional single blind study designed to investigate 37 CGH subjects compared with 37 healthy controls. Longus colli (LC) muscle Cross Sectional Area (CSA) in both sides was measured in supine position utilizing diagnostic ultrasonography.
  
  
  RESULTS
  The mean CSA of LC muscle in healthy subjects was 0.74 ± 0.06 cm2 and in patients suffering from CGH was 0.74 ± 0.06 cm2 in left and 0.75 ± 0.06 cm<2 in right side. No significant difference was found between subjects suffering from CGH compared with healthy controls. Also no difference was found between muscle size of affected and non-affected side in unilateral CGH subjects.
  
  
  CONCLUSIONS
  Results indicated that there was no relationship between size of LC muscle and pain laterality in patients with CGH.
authors.affiliation: Department of Physiotherapy, School of Rehabilitation Science, Iran University of Medical Sciences, Tehran, Iran.
authors.forename: Omolbanin
authors.initials: O
authors.lastname: Abaspour
authors.affiliation: Department of Physiotherapy, Babol University of Medical Sciences, Babol, Iran.
authors.forename: Khodabakhsh
authors.initials: K
authors.lastname: Javanshir
authors.affiliation: Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
authors.forename: Mohsen
authors.initials: M
authors.lastname: Amiri
authors.affiliation: Department of Biostatistics, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
authors.forename: Masoud
authors.initials: M
authors.lastname: Karimlou
mesh_terms: D000293:Adolescent; D000328:Adult; D002574:Cervical Vertebrae; D003430:Cross-Sectional Studies; D005260:Female; D006261:Headache; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D008875:Middle Aged; D009333:Neck; D009334:Neck Muscles / Q000000981:diagnostic imaging* / Q000503:physiopathology; D010146:Pain / Q000000981:diagnostic imaging* / Q000503:physiopathology; D051298:Post-Traumatic Headache / Q000000981:diagnostic imaging* / Q000503:physiopathology; D016037:Single-Blind Method; D014463:Ultrasonography; D055815:Young Adult
keywords: CGH; CSA; longus colli muscle; ultrasonography