Analysis of action tremor and impaired control of movement velocity in multiple sclerosis during visually guided wrist‐tracking tasks
Identifieur interne : 005410 ( Main/Exploration ); précédent : 005409; suivant : 005411Analysis of action tremor and impaired control of movement velocity in multiple sclerosis during visually guided wrist‐tracking tasks
Auteurs : Xuguang Liu [Royaume-Uni] ; Miall [Royaume-Uni] ; Tipu Z. Aziz [Royaume-Uni] ; Jackie A. Palace [Royaume-Uni] ; Patrick N. Haggard [Royaume-Uni] ; John F. Stein [Royaume-Uni]Source :
- Movement Disorders [ 0885-3185 ] ; 1997-11.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
- KwdEn :
- Adult, Exploration, Female, Human, Humans, Intention tremor, Male, Middle Aged, Motion, Movement Disorders (etiology), Movement velocity, Multiple Sclerosis (complications), Multiple sclerosis, Photic Stimulation, Severity of Illness Index, Thalamus (surgery), Tracking, Tracking task, Tremor, Tremor (diagnosis), Tremor (surgery), Velocity, Visual guidance, Wrist.
- MESH :
- complications : Multiple Sclerosis.
- diagnosis : Tremor.
- etiology : Movement Disorders.
- surgery : Thalamus, Tremor.
- Adult, Female, Humans, Male, Middle Aged, Photic Stimulation, Severity of Illness Index, Wrist.
Abstract
We investigated the relationship between action tremor (AT) and impaired control of movement velocity (MV) in visually guided tracking tasks, in normal subjects and in patients with multiple sclerosis (MS) with or without motor deficits. The effects of withdrawing visual feedback of either the target or the cursor were then investigated. Visually cued simple reaction times (SRTs) were also measured. The effects of thalamotomy on motor performance in these tasks were evaluated in seven patients. In the MS patients with tremor, there was no correlation between AT and impairment in control of MV, but the latter was highly correlated with an increased delay in SRT. Withdrawal of visually guiding cues increased the error significantly in MV, but reduced AT by −30% in magnitude. Frequency analysis indicated that the AT had two components: (a) non‐visual‐dependent, oscillatory movements, mainly at 4 Hz; and (2) visual‐dependent, repetitive movements, with significant power at 1–2 Hz. Thalamotomy significantly reduced AT but hardly improved accuracy in MV. These results suggest that visual feedback of a spatial mismatch signal may provoke a visually dependent repetitive movement contributing to AT. Conduction delays along either the corticocerebello‐cortical or the proprioceptive pathways and impaired working memory caused by MS may be responsible for the movement disorders in these patients.
Url:
DOI: 10.1002/mds.870120624
Affiliations:
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Le document en format XML
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Aziz</name><affiliation wicri:level="3"><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName><wicri:orgArea>Department of Neurosurgery, Radcliffe Infirmary</wicri:orgArea></affiliation></author><author><name sortKey="Palace, Jackie A" sort="Palace, Jackie A" uniqKey="Palace J" first="Jackie A." last="Palace">Jackie A. Palace</name><affiliation wicri:level="3"><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName><wicri:orgArea>University Department of Clinical Neurology, Radcliffe Infirmary</wicri:orgArea></affiliation></author><author><name sortKey="Haggard, Patrick N" sort="Haggard, Patrick N" uniqKey="Haggard P" first="Patrick N." last="Haggard">Patrick N. Haggard</name><affiliation wicri:level="2"><country>Royaume-Uni</country><placeName><region type="country">Angleterre</region></placeName><wicri:cityArea>Department of Psychology, University College London, London</wicri:cityArea></affiliation></author><author><name sortKey="Stein, John F" sort="Stein, John F" uniqKey="Stein J" first="John F." last="Stein">John F. Stein</name><affiliation wicri:level="3"><country>Royaume-Uni</country><placeName><settlement type="city">Oxford</settlement><region type="country">Angleterre</region><region type="comté" nuts="2">Oxfordshire</region></placeName><wicri:orgArea>University Laboratory of Physiology</wicri:orgArea></affiliation></author></analytic><monogr></monogr><series><title level="j">Movement Disorders</title><title level="j" type="abbrev">Mov. Disord.</title><idno type="ISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="1997-11">1997-11</date><biblScope unit="vol">12</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="992">992</biblScope><biblScope unit="page" to="999">999</biblScope></imprint><idno type="ISSN">0885-3185</idno></series><idno type="istex">E3BD0D5AABD424EE0D4A2DE8AF304A33A8855410</idno><idno type="DOI">10.1002/mds.870120624</idno><idno type="ArticleID">MDS870120624</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0885-3185</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term><term>Exploration</term><term>Female</term><term>Human</term><term>Humans</term><term>Intention tremor</term><term>Male</term><term>Middle Aged</term><term>Motion</term><term>Movement Disorders (etiology)</term><term>Movement velocity</term><term>Multiple Sclerosis (complications)</term><term>Multiple sclerosis</term><term>Photic Stimulation</term><term>Severity of Illness Index</term><term>Thalamus (surgery)</term><term>Tracking</term><term>Tracking task</term><term>Tremor</term><term>Tremor (diagnosis)</term><term>Tremor (surgery)</term><term>Velocity</term><term>Visual guidance</term><term>Wrist</term></keywords><keywords scheme="MESH" qualifier="complications" xml:lang="en"><term>Multiple Sclerosis</term></keywords><keywords scheme="MESH" qualifier="diagnosis" xml:lang="en"><term>Tremor</term></keywords><keywords scheme="MESH" qualifier="etiology" xml:lang="en"><term>Movement Disorders</term></keywords><keywords scheme="MESH" qualifier="surgery" xml:lang="en"><term>Thalamus</term><term>Tremor</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Adult</term><term>Female</term><term>Humans</term><term>Male</term><term>Middle Aged</term><term>Photic Stimulation</term><term>Severity of Illness Index</term><term>Wrist</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Exploration</term><term>Homme</term><term>Mouvement</term><term>Poignet</term><term>Sclérose en plaque</term><term>Tremblement intentionnel</term><term>Tâche poursuite</term><term>Vitesse</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Homme</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We investigated the relationship between action tremor (AT) and impaired control of movement velocity (MV) in visually guided tracking tasks, in normal subjects and in patients with multiple sclerosis (MS) with or without motor deficits. The effects of withdrawing visual feedback of either the target or the cursor were then investigated. Visually cued simple reaction times (SRTs) were also measured. The effects of thalamotomy on motor performance in these tasks were evaluated in seven patients. In the MS patients with tremor, there was no correlation between AT and impairment in control of MV, but the latter was highly correlated with an increased delay in SRT. Withdrawal of visually guiding cues increased the error significantly in MV, but reduced AT by −30% in magnitude. Frequency analysis indicated that the AT had two components: (a) non‐visual‐dependent, oscillatory movements, mainly at 4 Hz; and (2) visual‐dependent, repetitive movements, with significant power at 1–2 Hz. Thalamotomy significantly reduced AT but hardly improved accuracy in MV. These results suggest that visual feedback of a spatial mismatch signal may provoke a visually dependent repetitive movement contributing to AT. Conduction delays along either the corticocerebello‐cortical or the proprioceptive pathways and impaired working memory caused by MS may be responsible for the movement disorders in these patients.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Oxfordshire</li></region><settlement><li>Oxford</li></settlement></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Liu, Xuguang" sort="Liu, Xuguang" uniqKey="Liu X" first="Xuguang" last="Liu">Xuguang Liu</name></region><name sortKey="Aziz, Tipu Z" sort="Aziz, Tipu Z" uniqKey="Aziz T" first="Tipu Z." last="Aziz">Tipu Z. Aziz</name><name sortKey="Haggard, Patrick N" sort="Haggard, Patrick N" uniqKey="Haggard P" first="Patrick N." last="Haggard">Patrick N. Haggard</name><name sortKey="Miall" sort="Miall" uniqKey="Miall" last="Miall">Miall</name><name sortKey="Palace, Jackie A" sort="Palace, Jackie A" uniqKey="Palace J" first="Jackie A." last="Palace">Jackie A. Palace</name><name sortKey="Stein, John F" sort="Stein, John F" uniqKey="Stein J" first="John F." last="Stein">John F. Stein</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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