MovDisordV3, PubMed, Corpus, bibRecord, 003772

Abnormal cortical sensory activation in dystonia: an fMRI study.

Identifieur interne : 003772 ( PubMed/Corpus ); précédent : 003771; suivant : 003773

Abnormal cortical sensory activation in dystonia: an fMRI study.

Auteurs : Stephen Butterworth ; Sue Francis ; Edward Kelly ; Francis Mcglone ; Richard Bowtell ; Guy V. Sawle

Source :

Movement disorders : official journal of the Movement Disorder Society [ 0885-3185 ] ; 2003.

RBID : pubmed:12784271

English descriptors

KwdEn :
- Adolescent, Adult, Aged, Case-Control Studies, Cerebral Cortex (physiopathology), Dystonia (diagnosis), Dystonia (physiopathology), Female, Humans, Image Processing, Computer-Assisted (methods), Magnetic Resonance Imaging (methods), Male, Middle Aged, Physical Stimulation (methods), Somatosensory Cortex (physiopathology), Touch, Vibration.
MESH :
- diagnosis : Dystonia.
- methods : Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Physical Stimulation.
- physiopathology : Cerebral Cortex, Dystonia, Somatosensory Cortex.
- Adolescent, Adult, Aged, Case-Control Studies, Female, Humans, Male, Middle Aged, Touch, Vibration.

Abstract

Despite the obvious motor manifestations of focal dystonia, it is recognised that the sensory system plays an important role in this condition. This functional magnetic resonance imaging study examines the sensory representations of individual digits both within the subregions of the primary sensory cortex (SI) and in other nonprimary sensory areas. Patients with focal dystonia and controls were scanned during vibrotactile stimulation of both the index (digit 2) and little (digit 5) fingers of their dominant hand (which was the affected hand in all the dystonic subjects). The activation maps obtained were analysed for location, size, and magnitude of activation and three-dimensional (3-D) orientation of digit representations. Data from both groups were compared. There were significant differences in the average 3-D separation between the two digit representations in area 1 of SI between subject groups (9.6 +/- 1.2 mm for controls and 4.1 +/- 0.2 mm for dystonic subjects). There were also strong trends for reversed ordering of the representation of the two digits in both the secondary sensory cortex and posterior parietal area between the two groups. In addition, in dystonic subjects, there was significant under activation in the secondary somatosensory cortex (SII/area 40) for both digits and in the posterior parietal area for digit 5. These results indicate the presence of widespread activation abnormalities in the cortical sensory system in dystonia.

DOI: 10.1002/mds.10416
PubMed: 12784271

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pubmed:12784271

Le document en format XML

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<author><name sortKey="Butterworth, Stephen" sort="Butterworth, Stephen" uniqKey="Butterworth S" first="Stephen" last="Butterworth">Stephen Butterworth</name>
<affiliation><nlm:affiliation>Department of Clinical Neurology, Queen's Medical Centre, Nottingham, United Kingdom. stevebandlizzie@aol.co.uk</nlm:affiliation>
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<author><name sortKey="Francis, Sue" sort="Francis, Sue" uniqKey="Francis S" first="Sue" last="Francis">Sue Francis</name>
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<author><name sortKey="Kelly, Edward" sort="Kelly, Edward" uniqKey="Kelly E" first="Edward" last="Kelly">Edward Kelly</name>
</author>
<author><name sortKey="Mcglone, Francis" sort="Mcglone, Francis" uniqKey="Mcglone F" first="Francis" last="Mcglone">Francis Mcglone</name>
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<author><name sortKey="Bowtell, Richard" sort="Bowtell, Richard" uniqKey="Bowtell R" first="Richard" last="Bowtell">Richard Bowtell</name>
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<author><name sortKey="Sawle, Guy V" sort="Sawle, Guy V" uniqKey="Sawle G" first="Guy V" last="Sawle">Guy V. Sawle</name>
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<front><div type="abstract" xml:lang="en">Despite the obvious motor manifestations of focal dystonia, it is recognised that the sensory system plays an important role in this condition. This functional magnetic resonance imaging study examines the sensory representations of individual digits both within the subregions of the primary sensory cortex (SI) and in other nonprimary sensory areas. Patients with focal dystonia and controls were scanned during vibrotactile stimulation of both the index (digit 2) and little (digit 5) fingers of their dominant hand (which was the affected hand in all the dystonic subjects). The activation maps obtained were analysed for location, size, and magnitude of activation and three-dimensional (3-D) orientation of digit representations. Data from both groups were compared. There were significant differences in the average 3-D separation between the two digit representations in area 1 of SI between subject groups (9.6 +/- 1.2 mm for controls and 4.1 +/- 0.2 mm for dystonic subjects). There were also strong trends for reversed ordering of the representation of the two digits in both the secondary sensory cortex and posterior parietal area between the two groups. In addition, in dystonic subjects, there was significant under activation in the secondary somatosensory cortex (SII/area 40) for both digits and in the posterior parietal area for digit 5. These results indicate the presence of widespread activation abnormalities in the cortical sensory system in dystonia.</div>
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<Abstract><AbstractText>Despite the obvious motor manifestations of focal dystonia, it is recognised that the sensory system plays an important role in this condition. This functional magnetic resonance imaging study examines the sensory representations of individual digits both within the subregions of the primary sensory cortex (SI) and in other nonprimary sensory areas. Patients with focal dystonia and controls were scanned during vibrotactile stimulation of both the index (digit 2) and little (digit 5) fingers of their dominant hand (which was the affected hand in all the dystonic subjects). The activation maps obtained were analysed for location, size, and magnitude of activation and three-dimensional (3-D) orientation of digit representations. Data from both groups were compared. There were significant differences in the average 3-D separation between the two digit representations in area 1 of SI between subject groups (9.6 +/- 1.2 mm for controls and 4.1 +/- 0.2 mm for dystonic subjects). There were also strong trends for reversed ordering of the representation of the two digits in both the secondary sensory cortex and posterior parietal area between the two groups. In addition, in dystonic subjects, there was significant under activation in the secondary somatosensory cortex (SII/area 40) for both digits and in the posterior parietal area for digit 5. These results indicate the presence of widespread activation abnormalities in the cortical sensory system in dystonia.</AbstractText>
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<MeshHeading><DescriptorName MajorTopicYN="N" UI="D014110">Touch</DescriptorName>
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	Movement Disorders (revue)
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Movement Disorders (revue)

Abnormal cortical sensory activation in dystonia: an fMRI study.

Abnormal cortical sensory activation in dystonia: an fMRI study.

Source :

English descriptors

Abstract

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

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