title: Prevalence of spontaneous dyskinesia in schizophrenic and non-schizophrenic psychiatric patients.
abstract: BACKGROUND
  Although movement disorders have been noted among patients never exposed to neuroleptic medications, the specificity of spontaneous dyskinesia to schizophrenia has rarely been examined.
  
  
  METHODS
  By abstracting detailed case records, we compared the prevalence of dyskinetic movements between 94 neuroleptic-naïve schizophrenic patients and 179 patients with other psychiatric disorders.
  
  
  RESULTS
  Dyskinetic movements were more common among patients with schizophrenia than among those with all other diagnoses, and were most often noted in the body areas typically associated with tardive dyskinesia.
  
  
  CONCLUSIONS
  Spontaneous dyskinesia appears to be relatively specific to schizophrenia and may be intrinsic to the pathophysiology of the disorder.
authors.affiliation: Chestnut Lodge Research Institute, Rockville, MD 20850, USA.
authors.forename: W S
authors.initials: WS
authors.lastname: Fenton
authors.forename: C R
authors.initials: CR
authors.lastname: Blyler
authors.forename: R J
authors.initials: RJ
authors.lastname: Wyatt
authors.forename: T H
authors.initials: TH
authors.lastname: McGlashan
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D004565:Electroconvulsive Therapy; D005260:Female; D006801:Humans; D008297:Male; D008396:Maryland / Q000453:epidemiology; D001523:Mental Disorders / Q000150:complications / Q000453:epidemiology / Q000628:therapy; D008875:Middle Aged; D009069:Movement Disorders / Q000150:complications* / Q000453:epidemiology; D015995:Prevalence; D012559:Schizophrenia / Q000150:complications* / Q000453:epidemiology / Q000628:therapy