Abnormalities of spatial and temporal sensory discrimination in Writer's cramp
Identifieur interne : 006F69 ( Main/Merge ); précédent : 006F68; suivant : 006F70Abnormalities of spatial and temporal sensory discrimination in Writer's cramp
Auteurs : Terence D. Sanger [États-Unis] ; Daniel Tarsy [États-Unis] ; Alvaro Pascual-Leone [États-Unis]Source :
- Movement disorders [ 0885-3185 ] ; 2001.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
- KwdEn :
Abstract
Clinical observations of patients with writer's cramp suggest that abnormalities of the sensory system may be a frequent finding in this disorder. Neurophysiological data from an animal model of focal dystonia have revealed cells in somatosensory cortex with enlarged and overlapping tactile receptive fields. However, psychophysical studies so far have been unable to document a clinical correlate supporting a similar enlargement of receptive fields in humans. We compared the fingertip discrimination of the orientation of fine spatial gratings between writer's cramp and control subjects and found a significant decrease in grating sensitivity in the patients, consistent with the possibility of enlarged tactile receptive fields. In addition, we duplicated previous experiments showing an abnormality of tactile temporal discrimination. The results provide psychophysical measures which may relate to the development of sensory cortical reorganization in patients with writer cramp.
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Pascal:01-0138556Le document en format XML
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<author><name sortKey="Pascual Leone, Alvaro" sort="Pascual Leone, Alvaro" uniqKey="Pascual Leone A" first="Alvaro" last="Pascual-Leone">Alvaro Pascual-Leone</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Abnormalities of spatial and temporal sensory discrimination in Writer's cramp</title>
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<term>Writer cramp</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>Crampe écrivain</term>
<term>Sensibilité tactile</term>
<term>Discrimination</term>
<term>Stimulus</term>
<term>Electrique</term>
<term>Physiopathologie</term>
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<front><div type="abstract" xml:lang="en">Clinical observations of patients with writer's cramp suggest that abnormalities of the sensory system may be a frequent finding in this disorder. Neurophysiological data from an animal model of focal dystonia have revealed cells in somatosensory cortex with enlarged and overlapping tactile receptive fields. However, psychophysical studies so far have been unable to document a clinical correlate supporting a similar enlargement of receptive fields in humans. We compared the fingertip discrimination of the orientation of fine spatial gratings between writer's cramp and control subjects and found a significant decrease in grating sensitivity in the patients, consistent with the possibility of enlarged tactile receptive fields. In addition, we duplicated previous experiments showing an abnormality of tactile temporal discrimination. The results provide psychophysical measures which may relate to the development of sensory cortical reorganization in patients with writer cramp.</div>
</front>
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<tree><country name="États-Unis"><region name="Californie"><name sortKey="Sanger, Terence D" sort="Sanger, Terence D" uniqKey="Sanger T" first="Terence D." last="Sanger">Terence D. Sanger</name>
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<name sortKey="Pascual Leone, Alvaro" sort="Pascual Leone, Alvaro" uniqKey="Pascual Leone A" first="Alvaro" last="Pascual-Leone">Alvaro Pascual-Leone</name>
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