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- W2980555412 abstract "The purpose of the current study was to evaluate postural muscle performance of older adults in response to a combination of two motor tasks perturbations. Fifteen older participants were instructed to perform a pushing task as an upper limb perturbation while standing on a fixed or sliding board as a lower limb perturbation. Postural responses were characterized by onsets and magnitudes of muscle activities as well as onsets of segment movements. The sliding board did not affect the onset timing and sequence of muscle initiations and segment movements. However, significant large muscle activities of tibialis anterior and erector spinae were observed in the sliding condition (p < 0.05). The co-contraction values of the trunk and shank segments were significantly larger in the sliding condition through the studied periods (p < 0.05). Lastly, heavy pushing weight did not change the timing, magnitude, sequence of all studied parameters. Older adults enhanced postural stability by increasing the segment stiffness then started to handle two perturbations. In conclusion, they were able to deal with a dual motor-motor task after having secured their balance but could not make corresponding adjustments to the level of the perturbation difficulty." @default.
- W2980555412 created "2019-10-25" @default.
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- W2980555412 date "2019-10-14" @default.
- W2980555412 modified "2023-09-26" @default.
- W2980555412 title "Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in Elderly" @default.
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- W2980555412 doi "https://doi.org/10.3390/app9204319" @default.
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