title: Coupling between visual information and body sway in adults with Down syndrome.
abstract: BACKGROUND
  Prior studies suggest that infants with Down syndrome (DS) need more experience to acquire a similar relationship between visual information and body sway than infants without DS. However, it is unclear how adults with DS deal with visual information to control posture.
  
  
  OBJECTIVE
  To examine the coupling between visual information and body sway in adults with DS.
  
  
  METHODS
  Twenty adults with DS (25.8±4.0years) and twenty age- and sex-matched controls (25.6±4.0years) stood upright inside a "moving room" in two experimental conditions: continuous (room oscillated continuously at 0.1, 0.2, and 0.5Hz) and discrete (room moved forward or backward for a brief moment). Tridimensional body sway and moving room displacement data were registered.
  
  
  RESULTS
  Individuals with DS coupled their body sway to the imposed visual stimulus, but showed higher position variability at frequencies other than the frequency of room movement (0.48cm) and lower coherence (0.80) than controls (0.40cm and 0.90, respectively).
  
  
  CONCLUSIONS
  Adults with DS were able to couple to the visual cue, but with differences in terms of the scaling of postural responses to spatial parameters of the visual stimulus.
authors: School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, EEFERP-USP, São Paulo, Brazil. Electronic address: mmgomes@usp.br.
authors: Matheus Machado
authors: MM
authors: Gomes
authors: School of Physical Education and Sport of Ribeirão Preto, University of São Paulo, EEFERP-USP, São Paulo, Brazil.
authors: Renato
authors: R
authors: Moraes
authors: Institute of Physical Activity and Sport Sciences and Graduate Program in Human Movement Sciences, Cruzeiro do Sul University, São Paulo, Brazil; Institute of Bioscience, São Paulo State University, Rio Claro, Brazil.
authors: José Angelo
authors: JA
authors: Barela
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D003463:Cues; D004314:Down Syndrome / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D009039:Motion Perception; D009068:Movement; D004856:Postural Balance; D014796:Visual Perception; D055815:Young Adult
keywords: Disabilities; Postural control; Sensory information