title: Change of body movement coordination during cervical proprioceptive disturbances with increased age.
abstract: BACKGROUND
  To date, there are very few studies on postural stability in older adults using body movement recordings to capture the postural movement pattern. Moreover, the importance of proprioception at key areas such as the calf or neck on the postural movement pattern in older adults has rarely been investigated.
  
  
  OBJECTIVE
  To investigate whether the body movement coordination strategy to calf or neck vibration was affected by aging.
  
  
  METHODS
  Body movement measurements were taken at five locations (ankle, knee, hip, shoulder and head) from 18 younger (mean age 29.1 years) and 16 older (mean age 71.5 years) adult subjects using a 3D movement measuring system while subjected to 50 s of pseudo-random calf or neck vibratory stimulation pulses with eyes open or closed. The positions from the knee, hip, shoulder and head markers were correlated against one another to give an indication of the body coordination.
  
  
  RESULTS
  During quiet standing, older adults had greater correlation between the head and trunk than the young. There was an age effect in the body movement coordination strategy. Older adults had a different movement pattern with neck vibration involving mainly more independent knee movements, indicating balance difficulty.
  
  
  CONCLUSIONS
  Neck vibration affects the movement pattern in older adults more compared with younger adults and calf vibration, suggesting that, the regulation of body orientation in older adults is more difficult, especially during cervical proprioceptive disturbances.
authors.affiliation: Department of Otorhinolaryngology, Head and Neck Surgery, Lund University, Sweden. Mitesh.Patel@med.lu.se
authors.forename: M
authors.initials: M
authors.lastname: Patel
authors.forename: P A
authors.initials: PA
authors.lastname: Fransson
authors.forename: M
authors.initials: M
authors.lastname: Karlberg
authors.forename: E M
authors.initials: EM
authors.lastname: Malmstrom
authors.forename: M
authors.initials: M
authors.lastname: Magnusson
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D005260:Female; D006801:Humans; D007698:Kinesis / Q000502:physiology*; D007866:Leg; D008297:Male; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D009333:Neck; D010812:Physical Stimulation; D004856:Postural Balance / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology; D055815:Young Adult