Ankle muscle co-contractions during quiet standing are associated with decreased postural steadiness in the elderly.
Identifieur interne : 000542 ( Main/Corpus ); précédent : 000541; suivant : 000543Ankle muscle co-contractions during quiet standing are associated with decreased postural steadiness in the elderly.
Auteurs : Albert H. Vette ; Dimitry G. Sayenko ; Michael Jones ; Masaki O. Abe ; Kimitaka Nakazawa ; Kei MasaniSource :
- Gait & posture [ 1879-2219 ] ; 2017.
English descriptors
- KwdEn :
- Aged (MeSH), Ankle (physiology), Electromyography (MeSH), Female (MeSH), Healthy Volunteers (MeSH), Humans (MeSH), Male (MeSH), Motor Activity (physiology), Muscle Contraction (physiology), Muscle, Skeletal (physiology), Postural Balance (physiology), Posture (physiology), Pressure (MeSH), Rest (physiology), Time Factors (MeSH).
- MESH :
- physiology : Ankle, Motor Activity, Muscle Contraction, Muscle, Skeletal, Postural Balance, Posture, Rest.
- Aged, Electromyography, Female, Healthy Volunteers, Humans, Male, Pressure, Time Factors.
Abstract
It has been reported that the elderly use co-contraction of the tibialis anterior (TA) and plantarflexor muscles for longer duration during quiet standing than the young. However, the particular role of ankle muscle co-contractions in the elderly during quiet standing remains unclear. Therefore, the objective of this study was to investigate the association between ankle muscle co-contractions and postural steadiness during standing in the elderly. Twenty-seven young (27.2±4.5yrs) and twenty-three elderly (66.2±5.0yrs) subjects were asked to stand quietly on a force plate for five trials. The center of pressure (COP) trajectory and its velocity (COPv) as well as the center of mass (COM) trajectory and its velocity (COMv) and acceleration (ACC) were calculated using the force plate outputs. Electromyograms were obtained from the right TA, soleus (SOL), and medial gastrocnemius (MG) muscles. Periods of TA activity (TAon) and inactivity (TAoff) were determined using an EMG threshold based on TA resting level. Our results indicate that, in the elderly, the COPv, COMv, and ACC variability were significantly larger during TAon periods compared to TAoff periods. However, in the young, no significant association between respective variability and TA activity was found. We conclude that ankle muscle co-contractions in the elderly are not associated with an increase, but a decrease in postural steadiness. Future studies are needed to clarify the causal relationship between (1) ankle muscle co-contractions and (2) joint stiffness and multi-segmental actions during standing as well as their changes with aging.
DOI: 10.1016/j.gaitpost.2017.03.032
PubMed: 28411442
Links to Exploration step
pubmed:28411442Le document en format XML
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<affiliation><nlm:affiliation>Department of Mechanical Engineering, University of Alberta, 10-326 Donadeo Innovation Centre for Engineering, 9211 116 Street NW, Edmonton, Alberta, T6G 1H9, Canada; Glenrose Rehabilitation Hospital, Alberta Health Services, 10230 111 Avenue NW, Edmonton, Alberta, T5G 0B7, Canada.</nlm:affiliation>
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<author><name sortKey="Sayenko, Dimitry G" sort="Sayenko, Dimitry G" uniqKey="Sayenko D" first="Dimitry G" last="Sayenko">Dimitry G. Sayenko</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Ankle muscle co-contractions during quiet standing are associated with decreased postural steadiness in the elderly.</title>
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<affiliation><nlm:affiliation>Department of Mechanical Engineering, University of Alberta, 10-326 Donadeo Innovation Centre for Engineering, 9211 116 Street NW, Edmonton, Alberta, T6G 1H9, Canada; Glenrose Rehabilitation Hospital, Alberta Health Services, 10230 111 Avenue NW, Edmonton, Alberta, T5G 0B7, Canada.</nlm:affiliation>
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<author><name sortKey="Nakazawa, Kimitaka" sort="Nakazawa, Kimitaka" uniqKey="Nakazawa K" first="Kimitaka" last="Nakazawa">Kimitaka Nakazawa</name>
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<author><name sortKey="Masani, Kei" sort="Masani, Kei" uniqKey="Masani K" first="Kei" last="Masani">Kei Masani</name>
<affiliation><nlm:affiliation>Rehabilitation Engineering Laboratory, Institute of Biomaterials and Biomedical Engineering, University of Toronto, 164 College Street, Toronto, Ontario M5S 3G9, Canada; Rehabilitation Engineering Laboratory, Lyndhurst Centre, Toronto Rehabilitation Institute - University Health Network, 520 Sutherland Drive, Toronto, Ontario M4G 3V9, Canada. Electronic address: k.masani@utoronto.ca.</nlm:affiliation>
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<series><title level="j">Gait & posture</title>
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<term>Ankle (physiology)</term>
<term>Electromyography (MeSH)</term>
<term>Female (MeSH)</term>
<term>Healthy Volunteers (MeSH)</term>
<term>Humans (MeSH)</term>
<term>Male (MeSH)</term>
<term>Motor Activity (physiology)</term>
<term>Muscle Contraction (physiology)</term>
<term>Muscle, Skeletal (physiology)</term>
<term>Postural Balance (physiology)</term>
<term>Posture (physiology)</term>
<term>Pressure (MeSH)</term>
<term>Rest (physiology)</term>
<term>Time Factors (MeSH)</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Ankle</term>
<term>Motor Activity</term>
<term>Muscle Contraction</term>
<term>Muscle, Skeletal</term>
<term>Postural Balance</term>
<term>Posture</term>
<term>Rest</term>
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<keywords scheme="MESH" xml:lang="en"><term>Aged</term>
<term>Electromyography</term>
<term>Female</term>
<term>Healthy Volunteers</term>
<term>Humans</term>
<term>Male</term>
<term>Pressure</term>
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<front><div type="abstract" xml:lang="en">It has been reported that the elderly use co-contraction of the tibialis anterior (TA) and plantarflexor muscles for longer duration during quiet standing than the young. However, the particular role of ankle muscle co-contractions in the elderly during quiet standing remains unclear. Therefore, the objective of this study was to investigate the association between ankle muscle co-contractions and postural steadiness during standing in the elderly. Twenty-seven young (27.2±4.5yrs) and twenty-three elderly (66.2±5.0yrs) subjects were asked to stand quietly on a force plate for five trials. The center of pressure (COP) trajectory and its velocity (COPv) as well as the center of mass (COM) trajectory and its velocity (COMv) and acceleration (ACC) were calculated using the force plate outputs. Electromyograms were obtained from the right TA, soleus (SOL), and medial gastrocnemius (MG) muscles. Periods of TA activity (TAon) and inactivity (TAoff) were determined using an EMG threshold based on TA resting level. Our results indicate that, in the elderly, the COPv, COMv, and ACC variability were significantly larger during TAon periods compared to TAoff periods. However, in the young, no significant association between respective variability and TA activity was found. We conclude that ankle muscle co-contractions in the elderly are not associated with an increase, but a decrease in postural steadiness. Future studies are needed to clarify the causal relationship between (1) ankle muscle co-contractions and (2) joint stiffness and multi-segmental actions during standing as well as their changes with aging.</div>
</front>
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<ArticleTitle>Ankle muscle co-contractions during quiet standing are associated with decreased postural steadiness in the elderly.</ArticleTitle>
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<Abstract><AbstractText>It has been reported that the elderly use co-contraction of the tibialis anterior (TA) and plantarflexor muscles for longer duration during quiet standing than the young. However, the particular role of ankle muscle co-contractions in the elderly during quiet standing remains unclear. Therefore, the objective of this study was to investigate the association between ankle muscle co-contractions and postural steadiness during standing in the elderly. Twenty-seven young (27.2±4.5yrs) and twenty-three elderly (66.2±5.0yrs) subjects were asked to stand quietly on a force plate for five trials. The center of pressure (COP) trajectory and its velocity (COPv) as well as the center of mass (COM) trajectory and its velocity (COMv) and acceleration (ACC) were calculated using the force plate outputs. Electromyograms were obtained from the right TA, soleus (SOL), and medial gastrocnemius (MG) muscles. Periods of TA activity (TAon) and inactivity (TAoff) were determined using an EMG threshold based on TA resting level. Our results indicate that, in the elderly, the COPv, COMv, and ACC variability were significantly larger during TAon periods compared to TAoff periods. However, in the young, no significant association between respective variability and TA activity was found. We conclude that ankle muscle co-contractions in the elderly are not associated with an increase, but a decrease in postural steadiness. Future studies are needed to clarify the causal relationship between (1) ankle muscle co-contractions and (2) joint stiffness and multi-segmental actions during standing as well as their changes with aging.</AbstractText>
<CopyrightInformation>Copyright © 2017 Elsevier B.V. All rights reserved.</CopyrightInformation>
</Abstract>
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<ForeName>Albert H</ForeName>
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<Author ValidYN="Y"><LastName>Sayenko</LastName>
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<AffiliationInfo><Affiliation>Department of Integrative Biology and Physiology, University of California, Los Angeles, 610 Charles E. Young Dr. East, Los Angeles, CA, 90095, USA.</Affiliation>
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<ForeName>Michael</ForeName>
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<MeshHeadingList><MeshHeading><DescriptorName UI="D000368" MajorTopicYN="N">Aged</DescriptorName>
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<MeshHeading><DescriptorName UI="D000842" MajorTopicYN="N">Ankle</DescriptorName>
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<MeshHeading><DescriptorName UI="D009119" MajorTopicYN="N">Muscle Contraction</DescriptorName>
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<MeshHeading><DescriptorName UI="D004856" MajorTopicYN="N">Postural Balance</DescriptorName>
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<MeshHeading><DescriptorName UI="D011187" MajorTopicYN="N">Posture</DescriptorName>
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<MeshHeading><DescriptorName UI="D011312" MajorTopicYN="N">Pressure</DescriptorName>
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<MeshHeading><DescriptorName UI="D012146" MajorTopicYN="N">Rest</DescriptorName>
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<MeshHeading><DescriptorName UI="D013997" MajorTopicYN="N">Time Factors</DescriptorName>
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<KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="Y">Aging</Keyword>
<Keyword MajorTopicYN="Y">Center of mass</Keyword>
<Keyword MajorTopicYN="Y">Center of pressure</Keyword>
<Keyword MajorTopicYN="Y">Co-contractions</Keyword>
<Keyword MajorTopicYN="Y">Muscle activity</Keyword>
<Keyword MajorTopicYN="Y">Posturography</Keyword>
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