D L Manchester

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Age- and pathology-related changes in the relative contributions of visual and somatosensory inputs to dynamic balance control were evaluated. Young adults (mean age = 25, SD = 4) were compared to older adults (mean age = 68, SD = 5). Electromyographic responses were collected when subjects' balance was perturbed on a movable platform. The amounts of visual(More)
The purpose of this study was to determine if (a) the aging process directly affects the ability to prepare postural adjustments in advance of voluntary movements, or (b) if aging leads to longer movement times which, in turn, lead to less need for advance preparation of the postural muscles. That is, is velocity a mediating variable between age and lack of(More)
Experiments comparing the characteristics of neuromuscular responses underlying balance control in young and old adults have shown a number of differences between the two populations. Postural muscle response latencies of the ankle musculature activated by external threats to balance are slightly, but significantly, longer in the latter population. In(More)
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