fMRI-derived cortical maps for haptic shape, texture, and hardness
Identifieur interne : 001353 ( PascalFrancis/Corpus ); précédent : 001352; suivant : 001354fMRI-derived cortical maps for haptic shape, texture, and hardness
Auteurs : P. Servos ; S. Lederman ; D. Wilson ; J. GatiSource :
- Cognitive brain research [ 0926-6410 ] ; 2001.
Descripteurs français
- Pascal (Inist)
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Abstract
We used functional magnetic resonance imaging (fMRI) to investigate the neural substrates involved in haptic processing of texture, shape, and hardness. Subjects performed haptic classification tasks on a set of 27 silicone objects having parametrically defined shape, texture, and hardness. The objects were ellipsoids of revolution in which the ratio of the long to the short axis was varied, producing three different shapes. Three surface textures and three hardness levels were used. In three separate experiments, the same subjects classified each object along the three levels of one of the object properties (shape, texture, or hardness). Texture, shape, and hardness processing led to contralateral activation in the postcentral gyrus (PCG). A common region located within relatively posterior portions of the PCG was observed during shape and texture identification whereas a separate and more anterior region was activated during the hardness identification task. The hardness identification task also produced bilateral activation within the parietal operculum.
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Format Inist (serveur)
NO : | PASCAL 01-0466921 INIST |
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ET : | fMRI-derived cortical maps for haptic shape, texture, and hardness |
AU : | SERVOS (P.); LEDERMAN (S.); WILSON (D.); GATI (J.) |
AF : | Department of Psychology, Queen's University/Kingston ON K7L 3N6/Canada (1 aut., 2 aut.); Robarts Research Institute/London ON N6A 5K8/Canada (3 aut., 4 aut.) |
DT : | Publication en série; Niveau analytique |
SO : | Cognitive brain research; ISSN 0926-6410; Pays-Bas; Da. 2001; Vol. 12; No. 2; Pp. 307-313; Bibl. 19 ref. |
LA : | Anglais |
EA : | We used functional magnetic resonance imaging (fMRI) to investigate the neural substrates involved in haptic processing of texture, shape, and hardness. Subjects performed haptic classification tasks on a set of 27 silicone objects having parametrically defined shape, texture, and hardness. The objects were ellipsoids of revolution in which the ratio of the long to the short axis was varied, producing three different shapes. Three surface textures and three hardness levels were used. In three separate experiments, the same subjects classified each object along the three levels of one of the object properties (shape, texture, or hardness). Texture, shape, and hardness processing led to contralateral activation in the postcentral gyrus (PCG). A common region located within relatively posterior portions of the PCG was observed during shape and texture identification whereas a separate and more anterior region was activated during the hardness identification task. The hardness identification task also produced bilateral activation within the parietal operculum. |
CC : | 002A26C04 |
FD : | Sensibilité tactile; Forme stimulus; Texture stimulus; Dureté; Encéphale; Cortex cérébral; Topographie; Imagerie RMN; Homme; Imagerie fonctionnelle |
FG : | Cognition; Système nerveux central |
ED : | Tactile sensitivity; Stimulus shape; Stimulus texture; Hardness; Brain (vertebrata); Cerebral cortex; Topography; Nuclear magnetic resonance imaging; Human; Functional imaging |
EG : | Cognition; Central nervous system |
SD : | Sensibilidad tactil; Forma estímulo; Textura estímulo; Dureza; Encéfalo; Corteza cerebral; Topografía; Imageria RMN; Hombre |
LO : | INIST-22645.354000099567570110 |
ID : | 01-0466921 |
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Pascal:01-0466921Le document en format XML
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