Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in Elderly
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/20/4319 |
| _version_ | 1819243408687890432 |
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| author | Yun-Ju Lee Jing Nong Liang Yu-Tang Wen |
| author_facet | Yun-Ju Lee Jing Nong Liang Yu-Tang Wen |
| author_sort | Yun-Ju Lee |
| collection | DOAJ |
| description | 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 (<i>p</i> < 0.05). The co-contraction values of the trunk and shank segments were significantly larger in the sliding condition through the studied periods (<i>p</i> < 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. |
| first_indexed | 2024-12-23T14:55:14Z |
| format | Article |
| id | doaj.art-ee0b524985b248a3b6465710be0e614e |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-23T14:55:14Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-ee0b524985b248a3b6465710be0e614e2022-12-21T17:42:48ZengMDPI AGApplied Sciences2076-34172019-10-01920431910.3390/app9204319app9204319Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in ElderlyYun-Ju Lee0Jing Nong Liang1Yu-Tang Wen2Department of Industrial Engineering and Engineering Management, National Tsing Hua University, Hsinchu 30013, TaiwanDepartment of Physical Therapy, University of Nevada Las Vegas, Las Vegas, NV 89154, USADepartment of Industrial Engineering and Engineering Management, National Tsing Hua University, Hsinchu 30013, TaiwanThe 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 (<i>p</i> < 0.05). The co-contraction values of the trunk and shank segments were significantly larger in the sliding condition through the studied periods (<i>p</i> < 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.https://www.mdpi.com/2076-3417/9/20/4319postural control strategymuscle activitydual-taskolder adulttranslation perturbation |
| spellingShingle | Yun-Ju Lee Jing Nong Liang Yu-Tang Wen Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in Elderly Applied Sciences postural control strategy muscle activity dual-task older adult translation perturbation |
| title | Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in Elderly |
| title_full | Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in Elderly |
| title_fullStr | Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in Elderly |
| title_full_unstemmed | Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in Elderly |
| title_short | Characteristics of Postural Muscle Activity in Response to A Motor-Motor Task in Elderly |
| title_sort | characteristics of postural muscle activity in response to a motor motor task in elderly |
| topic | postural control strategy muscle activity dual-task older adult translation perturbation |
| url | https://www.mdpi.com/2076-3417/9/20/4319 |
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