Nonstationarities of postural sway.

Time-frequency analysis of visually induced postural sway has uncovered potentially important time-dependent spectral changes in sway, particularly over intervals shorter than most trial lengths (tens of seconds). Specifically, our studies of center of pressure (COP) in response to sinusoidal (0.25...

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Vydáno v:	IEEE Engineering in medicine and biology magazine 22, 2 (2003).
Hlavní autor:	Loughlin, P.J
Médium:	Článek
Jazyk:	English
Témata:	0.25 Hz. Adaptation. Bandwidth. Center of pressure. Conditional mean frequency. Control subjects. Healthy elderly subjects. Healthy young subjects. Human balance. Instantaneous bandwidth. Instantaneous frequency. Low-order conditional moments. Nonstationary analysis. Population-dependent time-varying changes. Postural sway nonstationarities. Sinusoidal moving scene perturbations. Stimulus frequency. Time-dependent spectral changes. Time-frequency analysis. Time-variations. Vestibularly impaired group. Visual perturbations. Visually induced postural sway.