MovDisordV3, Main, Exploration, bibRecord, 002039

Synchronized brain network associated with essential tremor as revealed by magnetoencephalography

Identifieur interne : 002039 ( Main/Exploration ); précédent : 002038; suivant : 002040

Synchronized brain network associated with essential tremor as revealed by magnetoencephalography

Auteurs : Alfons Schnitzler [Allemagne] ; Christian Münks [Allemagne] ; Markus Butz [Allemagne] ; Lars Timmermann [Allemagne] ; Joachim Gross [Royaume-Uni]

Source :

Movement Disorders [ 0885-3185 ] ; 2009-08-15.

RBID : ISTEX:7E6D38040F0FE650E55FED835E09780D72E86B9C

Descripteurs français

Pascal (Inist)
- Cohérence, Couplage, Encéphale, Magnétoencéphalographie, Oscillation, Pathologie du système nerveux, Synchronisation, Tremblement.

English descriptors

KwdEn :
- Adult, Biological Clocks, Brain (physiopathology), Brain Mapping, Brain Stem (physiopathology), Cerebellum (physiopathology), Coherence, Coupling, Electromyography, Encephalon, Essential Tremor (physiopathology), Female, Forearm (physiopathology), Humans, Isometric Contraction, Magnetoencephalography, Male, Middle Aged, Motor Cortex (physiopathology), Muscle, Skeletal (innervation), Muscle, Skeletal (physiopathology), Nerve Net (physiopathology), Nervous system diseases, Oscillation, Synchronization, Thalamus (physiopathology), Tremor, coherence, coupling, essential tremor, oscillations, synchronization.
MESH :
- innervation : Muscle, Skeletal.
- physiopathology : Brain, Brain Stem, Cerebellum, Essential Tremor, Forearm, Motor Cortex, Muscle, Skeletal, Nerve Net, Thalamus.
- Adult, Biological Clocks, Brain Mapping, Electromyography, Female, Humans, Isometric Contraction, Magnetoencephalography, Male, Middle Aged.

Abstract

Despite the fact that essential tremor (ET) is the most prevalent movement disorder, the underlying pathological mechanisms are not fully understood. There is accumulating evidence that this specific type of tremor is mainly of central origin, in particular involving inferior olive, cerebellum, thalamus, and primary motor cortex. We studied 8 patients with ET recording simultaneously neural activity with a whole‐scalp neuromagnetometer and tremor activity with surface electromyography (EMG). Subjects performed an isometric contraction of the left forearm. Tremor frequency of 5 to 7 Hz and its first harmonic were clearly evident in power spectra of EMG recordings. We used the localization technique dynamic imaging of coherent sources (DICS) to identify cerebral areas coherent to the EMG signal at tremor frequency and its first harmonic. All subjects showed coherence to the contralateral primary motor cortex. In a further step, DICS was used to identify areas of significant cerebro‐cerebral coherence. The analysis revealed a network of areas consisting of contralateral primary motor cortex, premotor cortex, thalamus, brainstem, and ipsilateral cerebellum. These results are consistent with the view that in ET, a network of cerebral areas including brainstem shows oscillatory interactions, which lead to a rhythmic modulation of muscle activity becoming apparent as tremor. © 2009 Movement Disorder Society

Url:

https://api.istex.fr/document/7E6D38040F0FE650E55FED835E09780D72E86B9C/fulltext/pdf

DOI: 10.1002/mds.22633

Affiliations:

Le document en format XML

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<front><div type="abstract" xml:lang="fr">Despite the fact that essential tremor (ET) is the most prevalent movement disorder, the underlying pathological mechanisms are not fully understood. There is accumulating evidence that this specific type of tremor is mainly of central origin, in particular involving inferior olive, cerebellum, thalamus, and primary motor cortex. We studied 8 patients with ET recording simultaneously neural activity with a whole‐scalp neuromagnetometer and tremor activity with surface electromyography (EMG). Subjects performed an isometric contraction of the left forearm. Tremor frequency of 5 to 7 Hz and its first harmonic were clearly evident in power spectra of EMG recordings. We used the localization technique dynamic imaging of coherent sources (DICS) to identify cerebral areas coherent to the EMG signal at tremor frequency and its first harmonic. All subjects showed coherence to the contralateral primary motor cortex. In a further step, DICS was used to identify areas of significant cerebro‐cerebral coherence. The analysis revealed a network of areas consisting of contralateral primary motor cortex, premotor cortex, thalamus, brainstem, and ipsilateral cerebellum. These results are consistent with the view that in ET, a network of cerebral areas including brainstem shows oscillatory interactions, which lead to a rhythmic modulation of muscle activity becoming apparent as tremor. © 2009 Movement Disorder Society</div>
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Movement Disorders (revue)

Synchronized brain network associated with essential tremor as revealed by magnetoencephalography

Synchronized brain network associated with essential tremor as revealed by magnetoencephalography

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

	Movement Disorders (revue)
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