MovDisordV3, PubMed, Checkpoint, bibRecord, 002774

Impaired motor imagery in patients with essential tremor: a case control study.

Identifieur interne : 002774 ( PubMed/Checkpoint ); précédent : 002773; suivant : 002775

Impaired motor imagery in patients with essential tremor: a case control study.

Auteurs : Yew-Long Lo [Singapour] ; Elan D. Louis ; Stephanie Fook-Chong ; Eng-King Tan

Source :

Movement disorders : official journal of the Movement Disorder Society [ 0885-3185 ] ; 2007.

RBID : pubmed:17226857

English descriptors

KwdEn :
- Adult, Aged, Case-Control Studies, Essential Tremor (epidemiology), Essential Tremor (physiopathology), Essential Tremor (therapy), Evoked Potentials, Motor (physiology), Female, Humans, Imagination, Male, Middle Aged, Motion Perception, Perceptual Disorders (diagnosis), Perceptual Disorders (epidemiology), Perceptual Disorders (therapy), Severity of Illness Index, Transcranial Magnetic Stimulation, Upper Extremity (physiopathology).
MESH :
- diagnosis : Perceptual Disorders.
- epidemiology : Essential Tremor, Perceptual Disorders.
- physiology : Evoked Potentials, Motor.
- physiopathology : Essential Tremor, Upper Extremity.
- therapy : Essential Tremor, Perceptual Disorders.
- Adult, Aged, Case-Control Studies, Female, Humans, Imagination, Male, Middle Aged, Motion Perception, Severity of Illness Index, Transcranial Magnetic Stimulation.

Abstract

Motor imagery (MI), which refers to the process of mental representation of movements, has not been studied in patients with essential tremor (ET). We investigated the presence of impaired MI in ET patients compared with healthy controls. A group of drug-naive and nondemented ET patients and age-matched controls were studied using transcranial magnetic stimulation, while they were specifically instructed to try and imagine themselves performing two motor tasks. The various clinical and electrophysiological variables were evaluated and compared. Repeated measures ANOVA demonstrated a significant difference between ET patients and controls with respect to mean motor-evoked potential (MEP) amplitudes (F(1,38) = 31.92, P < 0.005) during MI. The process of MI effectively facilitated MEP amplitude in controls but not in ET patients, regardless of side of stimulation or motor tasks. We provide evidence to demonstrate impairment of MI in a group of ET patients compared with healthy controls. The basis for this novel finding is unclear, and further studies are warranted to determine whether it is related to cerebellar or motor cortical dysfunction.

DOI: 10.1002/mds.21356
PubMed: 17226857

Affiliations:

Singapour

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pubmed:17226857

Le document en format XML

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<author><name sortKey="Lo, Yew Long" sort="Lo, Yew Long" uniqKey="Lo Y" first="Yew-Long" last="Lo">Yew-Long Lo</name>
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<author><name sortKey="Louis, Elan D" sort="Louis, Elan D" uniqKey="Louis E" first="Elan D" last="Louis">Elan D. Louis</name>
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<author><name sortKey="Fook Chong, Stephanie" sort="Fook Chong, Stephanie" uniqKey="Fook Chong S" first="Stephanie" last="Fook-Chong">Stephanie Fook-Chong</name>
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<front><div type="abstract" xml:lang="en">Motor imagery (MI), which refers to the process of mental representation of movements, has not been studied in patients with essential tremor (ET). We investigated the presence of impaired MI in ET patients compared with healthy controls. A group of drug-naive and nondemented ET patients and age-matched controls were studied using transcranial magnetic stimulation, while they were specifically instructed to try and imagine themselves performing two motor tasks. The various clinical and electrophysiological variables were evaluated and compared. Repeated measures ANOVA demonstrated a significant difference between ET patients and controls with respect to mean motor-evoked potential (MEP) amplitudes (F(1,38) = 31.92, P < 0.005) during MI. The process of MI effectively facilitated MEP amplitude in controls but not in ET patients, regardless of side of stimulation or motor tasks. We provide evidence to demonstrate impairment of MI in a group of ET patients compared with healthy controls. The basis for this novel finding is unclear, and further studies are warranted to determine whether it is related to cerebellar or motor cortical dysfunction.</div>
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<Abstract><AbstractText>Motor imagery (MI), which refers to the process of mental representation of movements, has not been studied in patients with essential tremor (ET). We investigated the presence of impaired MI in ET patients compared with healthy controls. A group of drug-naive and nondemented ET patients and age-matched controls were studied using transcranial magnetic stimulation, while they were specifically instructed to try and imagine themselves performing two motor tasks. The various clinical and electrophysiological variables were evaluated and compared. Repeated measures ANOVA demonstrated a significant difference between ET patients and controls with respect to mean motor-evoked potential (MEP) amplitudes (F(1,38) = 31.92, P < 0.005) during MI. The process of MI effectively facilitated MEP amplitude in controls but not in ET patients, regardless of side of stimulation or motor tasks. We provide evidence to demonstrate impairment of MI in a group of ET patients compared with healthy controls. The basis for this novel finding is unclear, and further studies are warranted to determine whether it is related to cerebellar or motor cortical dysfunction.</AbstractText>
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	Movement Disorders (revue)
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Movement Disorders (revue)

Impaired motor imagery in patients with essential tremor: a case control study.

Impaired motor imagery in patients with essential tremor: a case control study.

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki