title: Gross and fine motor function in fibromyalgia and chronic fatigue syndrome.
abstract: OBJECTIVE
  This paper aimed to investigate motor proficiency in fine and gross motor function, with a focus on reaction time (RT) and movement skill, in patients with fibromyalgia (FM) and chronic fatigue syndrome (CFS) compared to healthy controls (HC).
  
  
  METHODS
  A total of 60 individuals (20 CFS, 20 FM, and 20 HC), age 19-49 years, participated in this study. Gross motor function in the lower extremity was assessed using a RT task during gait initiation in response to an auditory trigger. Fine motor function in the upper extremity was measured during a precision task (the Purdue Pegboard test) where the number of pins inserted within 30 s was counted.
  
  
  RESULTS
  No significant differences were found between FM and CFS in any parameters. FM and CFS groups had significantly longer RT than HC in the gait initiation (p=0.001, andp=0.004 respectively). In the Purdue Pegboard test, 20% in the FM group, 15% in the CFS groups, and 0% of HC group, scored below the threshold of the accepted performance. However, there were no significant differences between FM, CFS, and HC in this task (p=0.12).
  
  
  CONCLUSIONS
  Compared to controls, both CFS and FM groups displayed significantly longer RT in the gait initiation task. Generally, FM patients showed the worst results in both tests, although no group differences were found in fine motor control, according to the Purdue Pegboard test.
authors.affiliation: Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway; Department of Public Health and Nursing, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway.
authors.forename: Omid
authors.initials: O
authors.lastname: Rasouli
authors.affiliation: Department of Public Health and Nursing, General Practice Research Unit, Norwegian University of Science and Technology, Trondheim, Norway.
authors.forename: Egil A
authors.initials: EA
authors.lastname: Fors
authors.affiliation: Department of Circulation and Medical Imaging, Pain and Palliation Research Group, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway; National Competence Centre for Complex Symptom Disorders, St. Olav's University Hospital, Trondheim, Norway.
authors.forename: Petter Chr
authors.initials: PC
authors.lastname: Borchgrevink
authors.affiliation: Department of Radiation Sciences, Biomedical Engineering, Umeå University, Umeå, Sweden.
authors.forename: Fredrik
authors.initials: F
authors.lastname: Öhberg
authors.affiliation: Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, Trondheim, Norway.
authors.forename: Ann-Katrin
authors.initials: AK
authors.lastname: Stensdotter
keywords: Purdue Pegboard; chronic; fatigue syndrome; gait initiation; musculoskeletal diseases; reaction time