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Full-Text Articles in Physical Therapy
Effect Of Predictability Of The Magnitude Of A Perturbation On Anticipatory And Compensatory Postural Adjustments, Tippawan Kaewmanee, Huaqing (Virginia) Liang, Alexander S. Aruin
Effect Of Predictability Of The Magnitude Of A Perturbation On Anticipatory And Compensatory Postural Adjustments, Tippawan Kaewmanee, Huaqing (Virginia) Liang, Alexander S. Aruin
Physical Therapy Faculty Research
Balance maintenance in response to a perturbation could be affected by the predictability of the magnitude of the body disturbance. We investigated anticipatory (APAs) and compensatory (CPAs) postural adjustments in response to perturbations of predictable and unpredictable magnitudes. Twenty young adults received series of perturbations of small or large magnitudes the order of which was varied. Electromyographic activity of six leg and trunk muscles and displacements of the center-of-pressure (COP) were recorded. The muscle onset time, integrals of muscle activity, and COP displacements in the anterior–posterior direction were analyzed during the APA and CPA phases. The results indicated that when …
Older Adults Retain The Ability To Predict External Perturbations Using Auditory Cues Only, Huaqing Liang, Tippawan Kaewmanee, Alexander S. Aruin
Older Adults Retain The Ability To Predict External Perturbations Using Auditory Cues Only, Huaqing Liang, Tippawan Kaewmanee, Alexander S. Aruin
Physical Therapy Faculty Research
To maintain balance and prevent destabilization, humans utilize anticipatory postural adjustments (APAs) prior to the postural perturbations based on predictions and past experience. APAs involve the activation and inhibition of the trunk and leg muscles and a shift of the center-of-pressure (COP) position. The generation of APAs majorly relies on the availability and accuracy of visual information. However, our previous work showed that young adults could rely on an auditory cue only to generate APAs for an external perturbation similar to that when the visual information was available. Older adults generally have diminished APAs and consequently diminished postural control when …
Young Adults Can Learn To Predict Unexpected Posterior Perturbations Using An Auditory Cue, Huaqing Liang, Tippawan Kaewmanee, Alexander S. Aruin
Young Adults Can Learn To Predict Unexpected Posterior Perturbations Using An Auditory Cue, Huaqing Liang, Tippawan Kaewmanee, Alexander S. Aruin
Physical Therapy Faculty Research
To reduce the effect of an expected postural perturbation, central nervous system uses anticipatory postural adjustments (APAs), which include the activation and inhibition of the postural muscles and a slight shift of the center-of-pressure (COP) position. The generation of APAs majorly relies on the availability of visual information, and is learned through past experience. Hence, such protective mechanism to maintain balance is not implemented when perturbation comes from one’s back unexpectedly. Our previous work showed that young adults could rely on an auditory cue only to generate APAs for a front perturbation similar to that when vision was available. So …
The Role Of An Auditory Cue In Generating Anticipatory Postural Adjustments In Response To An External Perturbation, Huaqing Liang, Tippawan Kaewmanee, Alexander S. Aruin
The Role Of An Auditory Cue In Generating Anticipatory Postural Adjustments In Response To An External Perturbation, Huaqing Liang, Tippawan Kaewmanee, Alexander S. Aruin
Physical Therapy Faculty Research
Anticipatory postural adjustments (APAs) are usually generated to minimize the potential postural disturbance induced by predictable external perturbations. Visual information about a perturbation is important for the generation of APAs, but whether people can rely on auditory information to generate APAs is unknown. The aim of this study was to investigate the role of an auditory cue in generating APAs when visual information is not available. Fifteen young adults participated in the study. They received external perturbations a) with visual information but no auditory information available, b) without neither visual nor auditory information, c) with both visual and auditory information …