Postural control during a sit-to-stand task in individuals with mild Parkinson’s disease
Identifieur interne : 002D64 ( Main/Exploration ); précédent : 002D63; suivant : 002D65Postural control during a sit-to-stand task in individuals with mild Parkinson’s disease
Auteurs : Lisa M. Inkster [Canada] ; Janice J. Eng [Canada]Source :
- Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale [ 0014-4819 ] ; 2003.
English descriptors
- KwdEn :
- MESH :
- physiology : Adaptation, Physiological, Movement, Muscle, Skeletal, Posture, Reaction Time.
- physiopathology : Leg, Motor Cortex, Parkinson Disease.
- Aged, Humans, Male, Middle Aged.
Abstract
Individuals with Parkinson’s disease (PD) typically have difficulty rising from a chair. A major contributing factor may be altered anticipatory postural control; this hypothesis has been fueled by reports of altered function of the supplementary motor area in PD, an area linked to the preparation of movements. This study tested the hypothesis that individuals with PD would exhibit altered anticipatory postural control which would include a reduced preparatory hip flexion and decreased forward displacement of the COM prior to lift-off of the buttocks from the chair. Ten male subjects with PD and 10 male age-matched controls were instructed to rise from a chair without the use of their arms at their comfortable pace on two separated days during on and off-medication states. Body movements were recorded with an optoelectronic device, in addition to forces under the buttocks and each foot to calculate lower extremity joint angles, joint moments and net body centre of mass displacement (COM). The sit-to-stand (STS) duration was the same for the PD-on and controls, but greater for the PD-off group. The PD groups (on and off) used a hip flexion strategy (greater preparatory hip flexion displacement and forward COM displacement, reduced knee extensor moments) compared to the controls. Contrary to predictions, subjects with PD exaggerated, rather than reduced, the movement preparation of the STS using a hip flexion strategy. Possible underlying causes of this flexion strategy could include compensation for poor lower extremity muscle strength and a need for greater postural stability during the lift-off phase.
Url:
DOI: 10.1007/s00221-003-1629-8
PubMed: 12961057
PubMed Central: 3478322
Affiliations:
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Inkster</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Physical Therapy, University of British Columbia, Canada</nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Physical Therapy, University of British Columbia</wicri:regionArea><wicri:noRegion>University of British Columbia</wicri:noRegion></affiliation><affiliation><nlm:aff id="A2">Rehabilitation Research Laboratory, GF Strong Rehab Centre</nlm:aff><wicri:noCountry code="subfield">GF Strong Rehab Centre</wicri:noCountry></affiliation></author><author><name sortKey="Eng, Janice J" sort="Eng, Janice J" uniqKey="Eng J" first="Janice J" last="Eng">Janice J. Eng</name><affiliation wicri:level="1"><nlm:aff id="A1">Department of Physical Therapy, University of British Columbia, Canada</nlm:aff><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Physical Therapy, University of British Columbia</wicri:regionArea><wicri:noRegion>University of British Columbia</wicri:noRegion></affiliation><affiliation><nlm:aff id="A2">Rehabilitation Research Laboratory, GF Strong Rehab Centre</nlm:aff><wicri:noCountry code="subfield">GF Strong Rehab Centre</wicri:noCountry></affiliation></author></analytic><series><title level="j">Experimental brain research. Experimentelle Hirnforschung. Experimentation cerebrale</title><idno type="ISSN">0014-4819</idno><idno type="eISSN">1432-1106</idno><imprint><date when="2003">2003</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adaptation, Physiological (physiology)</term><term>Aged</term><term>Humans</term><term>Leg (physiopathology)</term><term>Male</term><term>Middle Aged</term><term>Motor Cortex (physiopathology)</term><term>Movement (physiology)</term><term>Muscle, Skeletal (physiology)</term><term>Parkinson Disease (physiopathology)</term><term>Posture (physiology)</term><term>Reaction Time (physiology)</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Adaptation, Physiological</term><term>Movement</term><term>Muscle, Skeletal</term><term>Posture</term><term>Reaction Time</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Leg</term><term>Motor Cortex</term><term>Parkinson Disease</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Aged</term><term>Humans</term><term>Male</term><term>Middle Aged</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p id="P1">Individuals with Parkinson’s disease (PD) typically have difficulty rising from a chair. A major contributing factor may be altered anticipatory postural control; this hypothesis has been fueled by reports of altered function of the supplementary motor area in PD, an area linked to the preparation of movements. This study tested the hypothesis that individuals with PD would exhibit altered anticipatory postural control which would include a reduced preparatory hip flexion and decreased forward displacement of the COM prior to lift-off of the buttocks from the chair. Ten male subjects with PD and 10 male age-matched controls were instructed to rise from a chair without the use of their arms at their comfortable pace on two separated days during on and off-medication states. Body movements were recorded with an optoelectronic device, in addition to forces under the buttocks and each foot to calculate lower extremity joint angles, joint moments and net body centre of mass displacement (COM). The sit-to-stand (STS) duration was the same for the PD-on and controls, but greater for the PD-off group. The PD groups (on and off) used a hip flexion strategy (greater preparatory hip flexion displacement and forward COM displacement, reduced knee extensor moments) compared to the controls. Contrary to predictions, subjects with PD exaggerated, rather than reduced, the movement preparation of the STS using a hip flexion strategy. Possible underlying causes of this flexion strategy could include compensation for poor lower extremity muscle strength and a need for greater postural stability during the lift-off phase.</p></div></front></TEI><affiliations><list><country><li>Canada</li></country></list><tree><country name="Canada"><noRegion><name sortKey="Inkster, Lisa M" sort="Inkster, Lisa M" uniqKey="Inkster L" first="Lisa M" last="Inkster">Lisa M. Inkster</name></noRegion><name sortKey="Eng, Janice J" sort="Eng, Janice J" uniqKey="Eng J" first="Janice J" last="Eng">Janice J. 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