title: Halo vest effect on balance.
abstract: OBJECTIVE
  To determine the effect of a halo vest, a cervical orthosis, on clinically relevant balance parameters.
  
  
  METHODS
  Subjects performed unipedal stance (with eyes open and closed, on both firm and soft surfaces) and functional reach, with and without the application of a halo vest.
  
  
  METHODS
  A convenience sample of 12 healthy young subjects, with an equal number of men and women.
  
  
  METHODS
  Seconds for unipedal stance (maximum 45); inches for functional reach.
  
  
  RESULTS
  Both unipedal stance times and functional reach (mean +/- standard deviation) were significantly decreased with the halo vest as compared to without it (29.1+/-5.8 vs. 32.8+/-6.4 seconds, p = .002; 12.9+/-1.4 vs. 15.1+/-2.1 inches, p<.01).
  
  
  CONCLUSIONS
  A halo vest causes an acute impairment in balance in the healthy young. It is likely that the impairment would be greater in older or injured patients, thus increasing their risk for a fall, which could have devastating consequences.
authors.affiliation: Department of Physical Medicine and Rehabilitation, University of Michigan Medical Center, Ann Arbor, USA.
authors.forename: J K
authors.initials: JK
authors.lastname: Richardson
authors.forename: A D
authors.initials: AD
authors.lastname: Ross
authors.forename: B
authors.initials: B
authors.lastname: Riley
authors.forename: R L
authors.initials: RL
authors.lastname: Rhodes
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009333:Neck; D009989:Orthotic Devices; D004856:Postural Balance