title: Changing control strategies during standard assessment using computerized dynamic posturography with older women.
abstract: The goal of this investigation was to explore the use of spectral analysis to examine the data obtained during computerized dynamic posturography (CDP). In particular, we examined whether spectral analysis would provide more detailed information about underlying postural control strategies and potential learning across conditions and trials of the sensory organization test (SOT). Twenty older women between the ages of 60 and 72 (mean=65.2) were assessed using standard testing protocol. Participants showed significant improvements from the first to the second trials in their equilibrium scores in the more difficult conditions. This finding was reflected in the spectral analysis data by a shift in the frequency distribution towards greater power in the lower frequency range. This frequency change likely reflects a change in the ankle strategy used to maintain balance during the more difficult conditions.
authors.affiliation: Department of Kinesiology, University of Illinois at Urbana-Champaign, IL 61801, United States. krosengr@uiuc.edu
authors.forename: Karl S
authors.initials: KS
authors.lastname: Rosengren
authors.forename: Karthikeyan
authors.initials: K
authors.lastname: Rajendran
authors.forename: Jonas
authors.initials: J
authors.lastname: Contakos
authors.forename: Li-Ling
authors.initials: LL
authors.lastname: Chuang
authors.forename: Melissa
authors.initials: M
authors.lastname: Peterson
authors.forename: Richard
authors.initials: R
authors.lastname: Doyle
authors.forename: Edward
authors.initials: E
authors.lastname: McAuley
mesh_terms: D000368:Aged; D000704:Analysis of Variance; D003936:Diagnosis, Computer-Assisted; D005260:Female; D005684:Gait / Q000502:physiology; D006801:Humans; D008875:Middle Aged; D009068:Movement / Q000502:physiology; D011187:Posture / Q000502:physiology*; D011434:Proprioception / Q000502:physiology*; D011446:Prospective Studies; D014785:Vision, Ocular / Q000502:physiology