Altered movement trajectories and force control during object transport in Huntington's disease.
Identifieur interne : 000505 ( Ncbi/Merge ); précédent : 000504; suivant : 000506Altered movement trajectories and force control during object transport in Huntington's disease.
Auteurs : L. Quinn [États-Unis] ; R. Reilmann ; K. Marder ; A M GordonSource :
- Movement disorders : official journal of the Movement Disorder Society [ 0885-3185 ] ; 2001.
English descriptors
- KwdEn :
- MESH :
- complications : Huntington Disease.
- etiology : Hypokinesia.
- physiopathology : Huntington Disease, Movement Disorders.
- Adult, Aged, Biomechanical Phenomena, Case-Control Studies, Female, Hand Strength, Humans, Male, Middle Aged, Movement.
Abstract
Individuals with Huntington's Disease (HD) have difficulty grasping and transporting objects, however, the extent to which specific impairments affect their performance is unknown. The present study examined the kinematics and force coordination during transport of an object in 12 subjects with HD and 12 age-matched controls. Subjects grasped an object between their thumb and index finger, transported it 25 cm forward, replaced and released it while their fingertip forces and the object's position were recorded. Five trials were performed with each of three weights (200 g, 400 g, and 800 g). While bradykinesia was evident in subjects with HD, this slowness was not consistently observed in all phases of the movement. The slowness of movement seen during the task appears to be due to impairments in sequencing and the movement strategies selected by the subjects. Compared to control subjects, subjects with HD produced highly curvilinear hand paths and more variable grip forces that were dependent on the weight of the object. Isometric force development and movement speed during transport were unaffected by the disease. The results suggest that prolonged task durations in subjects with HD are not necessarily due to slowness of movement, per se. These findings have clinical implications for understanding the task-specific nature of movement impairments in HD and developing effective intervention strategies.
PubMed: 11391741
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pubmed:11391741Le document en format XML
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<author><name sortKey="Reilmann, R" sort="Reilmann, R" uniqKey="Reilmann R" first="R" last="Reilmann">R. Reilmann</name>
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<author><name sortKey="Marder, K" sort="Marder, K" uniqKey="Marder K" first="K" last="Marder">K. Marder</name>
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<author><name sortKey="Gordon, A M" sort="Gordon, A M" uniqKey="Gordon A" first="A M" last="Gordon">A M Gordon</name>
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<author><name sortKey="Quinn, L" sort="Quinn, L" uniqKey="Quinn L" first="L" last="Quinn">L. Quinn</name>
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<front><div type="abstract" xml:lang="en">Individuals with Huntington's Disease (HD) have difficulty grasping and transporting objects, however, the extent to which specific impairments affect their performance is unknown. The present study examined the kinematics and force coordination during transport of an object in 12 subjects with HD and 12 age-matched controls. Subjects grasped an object between their thumb and index finger, transported it 25 cm forward, replaced and released it while their fingertip forces and the object's position were recorded. Five trials were performed with each of three weights (200 g, 400 g, and 800 g). While bradykinesia was evident in subjects with HD, this slowness was not consistently observed in all phases of the movement. The slowness of movement seen during the task appears to be due to impairments in sequencing and the movement strategies selected by the subjects. Compared to control subjects, subjects with HD produced highly curvilinear hand paths and more variable grip forces that were dependent on the weight of the object. Isometric force development and movement speed during transport were unaffected by the disease. The results suggest that prolonged task durations in subjects with HD are not necessarily due to slowness of movement, per se. These findings have clinical implications for understanding the task-specific nature of movement impairments in HD and developing effective intervention strategies.</div>
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<Title>Movement disorders : official journal of the Movement Disorder Society</Title>
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<Abstract><AbstractText>Individuals with Huntington's Disease (HD) have difficulty grasping and transporting objects, however, the extent to which specific impairments affect their performance is unknown. The present study examined the kinematics and force coordination during transport of an object in 12 subjects with HD and 12 age-matched controls. Subjects grasped an object between their thumb and index finger, transported it 25 cm forward, replaced and released it while their fingertip forces and the object's position were recorded. Five trials were performed with each of three weights (200 g, 400 g, and 800 g). While bradykinesia was evident in subjects with HD, this slowness was not consistently observed in all phases of the movement. The slowness of movement seen during the task appears to be due to impairments in sequencing and the movement strategies selected by the subjects. Compared to control subjects, subjects with HD produced highly curvilinear hand paths and more variable grip forces that were dependent on the weight of the object. Isometric force development and movement speed during transport were unaffected by the disease. The results suggest that prolonged task durations in subjects with HD are not necessarily due to slowness of movement, per se. These findings have clinical implications for understanding the task-specific nature of movement impairments in HD and developing effective intervention strategies.</AbstractText>
<CopyrightInformation>Copyright 2001 Movement Disorder Society.</CopyrightInformation>
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