Deficits of temporal discrimination in dystonia are independent from the spatial distance between the loci of tactile stimulation
Identifieur interne : 002803 ( PascalFrancis/Checkpoint ); précédent : 002802; suivant : 002804Deficits of temporal discrimination in dystonia are independent from the spatial distance between the loci of tactile stimulation
Auteurs : Michele Tinazzi [Italie] ; Antonio Fiaschi [Italie] ; Emma Frasson [Italie] ; Mirta Fiorio [Italie] ; Feliciana Cortese [Italie] ; Salvatore M. Aglioti [Italie]Source :
- Movement disorders [ 0885-3185 ] ; 2002.
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Abstract
To assess whether spatial variables influence deficits of temporal somesthetic discrimination in dystonic patients, 10 patients with idiopathic dystonia and 12 healthy controls were tested with pairs of non-noxious electrical stimuli separated by different time intervals. Stimuli were delivered: (I) to the pad of the index finger (same-point condition), (2) to the pad and to the base of the index finger (same-finger condition), and (3) to the pad of the index and ring fingers (different-finger condition). Subjects were asked to report whether they perceived single or double stimuli in the first condition and synchronous or asynchronous stimuli in the second and third conditions, Somesthetic temporal discrimination thresholds (STDTs) were obtained by computing the shortest time interval at which stimuli, applied to the left or the right hand, were perceived as separate in the first condition or asynchronous in the second and third conditions. STDTs were significantly higher in dystonic patients than controls in all three conditions. In both dystonia patients and controls, STDTs resulted highest in conditions whereby stimuli were maximally separated in space. Results extend current knowledge of deficits of somesthetic temporal discrimination in dystonia by showing that temporal deficits are not influenced by spatial variables.
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Aglioti</name><affiliation wicri:level="3"><inist:fA14 i1="04"><s1>Dipartimento di Psicologia, Università di Roma La Sapienza, and IRCCS, Fondazione S. 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Stimuli were delivered: (I) to the pad of the index finger (same-point condition), (2) to the pad and to the base of the index finger (same-finger condition), and (3) to the pad of the index and ring fingers (different-finger condition). Subjects were asked to report whether they perceived single or double stimuli in the first condition and synchronous or asynchronous stimuli in the second and third conditions, Somesthetic temporal discrimination thresholds (STDTs) were obtained by computing the shortest time interval at which stimuli, applied to the left or the right hand, were perceived as separate in the first condition or asynchronous in the second and third conditions. STDTs were significantly higher in dystonic patients than controls in all three conditions. In both dystonia patients and controls, STDTs resulted highest in conditions whereby stimuli were maximally separated in space. 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Stimuli were delivered: (I) to the pad of the index finger (same-point condition), (2) to the pad and to the base of the index finger (same-finger condition), and (3) to the pad of the index and ring fingers (different-finger condition). Subjects were asked to report whether they perceived single or double stimuli in the first condition and synchronous or asynchronous stimuli in the second and third conditions, Somesthetic temporal discrimination thresholds (STDTs) were obtained by computing the shortest time interval at which stimuli, applied to the left or the right hand, were perceived as separate in the first condition or asynchronous in the second and third conditions. STDTs were significantly higher in dystonic patients than controls in all three conditions. In both dystonia patients and controls, STDTs resulted highest in conditions whereby stimuli were maximally separated in space. 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Aglioti</name><name sortKey="Cortese, Feliciana" sort="Cortese, Feliciana" uniqKey="Cortese F" first="Feliciana" last="Cortese">Feliciana Cortese</name><name sortKey="Fiaschi, Antonio" sort="Fiaschi, Antonio" uniqKey="Fiaschi A" first="Antonio" last="Fiaschi">Antonio Fiaschi</name><name sortKey="Fiorio, Mirta" sort="Fiorio, Mirta" uniqKey="Fiorio M" first="Mirta" last="Fiorio">Mirta Fiorio</name><name sortKey="Frasson, Emma" sort="Frasson, Emma" uniqKey="Frasson E" first="Emma" last="Frasson">Emma Frasson</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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