Sway patterns in orthostatic tremor: impairment of postural control mechanisms.
Identifieur interne : 001342 ( Ncbi/Curation ); précédent : 001341; suivant : 001343Sway patterns in orthostatic tremor: impairment of postural control mechanisms.
Auteurs : Ann M. Bacsi [Australie] ; Victor S C. Fung ; James G. ColebatchSource :
- Movement disorders : official journal of the Movement Disorder Society [ 0885-3185 ] ; 2005.
English descriptors
- KwdEn :
- MESH :
- etiology : Somatosensory Disorders.
- methods : Electromyography.
- physiology : Postural Balance.
- physiopathology : Tremor.
- Aged, Case-Control Studies, Female, Humans, Male, Middle Aged, Posture.
Abstract
Sway parameters in orthostatic tremor (OT) patients were compared with age-matched controls. The effects of vision (eyes open or closed), stance width (feet apart or together), and external support (with or without) on sway and 14-18 Hz energy were measured. Sway in OT patients decreased in the presence of each of the stabilizing factors but the extent of benefit obtained by OT patients was significantly less than controls for support for the sagittal plane (22% vs. 42% decrease; P < 0.01) and feet apart in the mediolateral plane (38% vs. 65% decrease; P < 0.01). Three patients with proprioceptive loss also had a reduced response to these factors. Energy in the 14-18 Hz range did not always change in parallel with sway levels. Vision suppresses activity at the OT frequency in patients. Postural control mechanisms in OT remain responsive to postural conditions, but patients differ significantly from normals in the degree of their responsiveness. OT appears to have disruption of the normal generation or processing of proprioceptive signals as one of its important components.
DOI: 10.1002/mds.20600
PubMed: 16037916
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Fung</name></author><author><name sortKey="Colebatch, James G" sort="Colebatch, James G" uniqKey="Colebatch J" first="James G" last="Colebatch">James G. Colebatch</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2005">2005</date><idno type="doi">10.1002/mds.20600</idno><idno type="RBID">pubmed:16037916</idno><idno type="pmid">16037916</idno><idno type="wicri:Area/PubMed/Corpus">002F70</idno><idno type="wicri:Area/PubMed/Curation">002F70</idno><idno type="wicri:Area/PubMed/Checkpoint">002F47</idno><idno type="wicri:Area/Ncbi/Merge">001342</idno><idno type="wicri:Area/Ncbi/Curation">001342</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Sway patterns in orthostatic tremor: impairment of postural control mechanisms.</title><author><name sortKey="Bacsi, Ann M" sort="Bacsi, Ann M" uniqKey="Bacsi A" first="Ann M" last="Bacsi">Ann M. Bacsi</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Neurological Sciences and University of New South Wales Clinical School, Prince of Wales Hospital, Sydney, New South Wales, Australia.</nlm:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>Institute of Neurological Sciences and University of New South Wales Clinical School, Prince of Wales Hospital, Sydney, New South Wales</wicri:regionArea><wicri:noRegion>New South Wales</wicri:noRegion></affiliation></author><author><name sortKey="Fung, Victor S C" sort="Fung, Victor S C" uniqKey="Fung V" first="Victor S C" last="Fung">Victor S C. Fung</name></author><author><name sortKey="Colebatch, James G" sort="Colebatch, James G" uniqKey="Colebatch J" first="James G" last="Colebatch">James G. Colebatch</name></author></analytic><series><title level="j">Movement disorders : official journal of the Movement Disorder Society</title><idno type="ISSN">0885-3185</idno><imprint><date when="2005" type="published">2005</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aged</term><term>Case-Control Studies</term><term>Electromyography (methods)</term><term>Female</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Postural Balance (physiology)</term><term>Posture</term><term>Somatosensory Disorders (etiology)</term><term>Tremor (physiopathology)</term></keywords><keywords scheme="MESH" qualifier="etiology" xml:lang="en"><term>Somatosensory Disorders</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Electromyography</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Postural Balance</term></keywords><keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Tremor</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Aged</term><term>Case-Control Studies</term><term>Female</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Posture</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Sway parameters in orthostatic tremor (OT) patients were compared with age-matched controls. The effects of vision (eyes open or closed), stance width (feet apart or together), and external support (with or without) on sway and 14-18 Hz energy were measured. Sway in OT patients decreased in the presence of each of the stabilizing factors but the extent of benefit obtained by OT patients was significantly less than controls for support for the sagittal plane (22% vs. 42% decrease; P < 0.01) and feet apart in the mediolateral plane (38% vs. 65% decrease; P < 0.01). Three patients with proprioceptive loss also had a reduced response to these factors. Energy in the 14-18 Hz range did not always change in parallel with sway levels. Vision suppresses activity at the OT frequency in patients. Postural control mechanisms in OT remain responsive to postural conditions, but patients differ significantly from normals in the degree of their responsiveness. OT appears to have disruption of the normal generation or processing of proprioceptive signals as one of its important components.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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