Two-dimensional coherence for measurement of asymmetry in postural steadiness

Reliability analysis of time series force plate data of community dwelling older adults

“…Previous studies indicate that frequency-based measures of postural steadiness change significantly in age and disease (Prieto et al, 1993, Myklebust et al, 2009) .The observed sway in quiet standing represents the output of the complex sensorimotor system of integrated information from the visual, vestibular and somatosensory system (Myklebust et al, 1995). The CoP time series may represent the dynamics of a nonlinear system (Johansson and Magnusson, 1991).…”

“…Alternatively, time and frequency domain measures are based upon the two dimensional time series, compromised of medio-lateral (ML) and anteriorposterior (AP) components of the CoP (Prieto et al, 1996, Myklebust et al, 2009). The ML and AP time series are often analyzed separately or combined into a composite time series (Myklebust et al, 2009).…”

“…The ML and AP time series are often analyzed separately or combined into a composite time series (Myklebust et al, 2009). Time series data have been used to distinguish between healthy young, healthy elderly adults and elderly adults with Huntington's disease (Prieto et al, 1996, Amoud et al, 2007, Myklebust et al, 2009.…”

Comparação entre medidas de descarga, simetria e transferência de peso em indivíduos com e sem hemiparesia

“…Comumente, em hemiparéticos, a postura em pé é caracterizada por descarga de peso assimetricamente distribuída entre os hemicorpos 1,[3][4][5][6][8][9][10][11][12][13][14] . Apesar de tais sujeitos preferencialmente adotarem um padrão de assimetria que sobrecarrega o lado não afetado, na síndrome de Pusher observa-se postura assimétrica que sobrecarrega o lado afetado 15,16 .…”

Intrasession reliability of centre of pressure time series data in elderly subjects

“…There is an ongoing search for biomarkers which point to early signs of age-related changes of the postural system. Frequency-based analysis of body sway has been used to distinguish between healthy young, healthy elderly and elderly adults with Huntingtons disease [2,3]. Our aim was to assess the reliability of spectral-based outcomes of the CoP-kinematics in order to determine if these outcomes could be tested for their capability to distinguish between elderly fallers and non-fallers in a future study.…”