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Détail de l'auteur
Auteur Gregory ESSICK |
Documents disponibles écrits par cet auteur (2)
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Perceptual and Neural Response to Affective Tactile Texture Stimulation in Adults with Autism Spectrum Disorders / Carissa J. CASCIO in Autism Research, 5-4 (August 2012)
[article]
Titre : Perceptual and Neural Response to Affective Tactile Texture Stimulation in Adults with Autism Spectrum Disorders Type de document : Texte imprimé et/ou numérique Auteurs : Carissa J. CASCIO, Auteur ; Estephan J. MOANA-FILHO, Auteur ; Steve GUEST, Auteur ; Mary Beth NEBEL, Auteur ; Jonathan WEISNER, Auteur ; Grace T. BARANEK, Auteur ; Gregory ESSICK, Auteur Année de publication : 2012 Article en page(s) : p.231-44 Langues : Anglais (eng) Mots-clés : touch fMRI sensory adults psychophysics affective Index. décimale : PER Périodiques Résumé : Autism spectrum disorders (ASD) are associated with differences in sensory sensitivity and affective response to sensory stimuli, the neural basis of which is still largely unknown. We used psychophysics and functional magnetic resonance imaging (fMRI) to investigate responses to somatosensory stimulation with three textured surfaces that spanned a range of roughness and pleasantness in a sample of adults with ASD and a control group. While psychophysical ratings of roughness and pleasantness were largely similar across the two groups, the ASD group gave pleasant and unpleasant textures more extreme average ratings than did controls. In addition, their ratings for a neutral texture were more variable than controls, indicating they are less consistent in evaluating a stimulus that is affectively ambiguous. Changes in brain blood oxygenation level-dependent (BOLD) signal in response to stimulation with these textures differed substantially between the groups, with the ASD group exhibiting diminished responses compared to the control group, particularly for pleasant and neutral textures. For the most unpleasant texture, the ASD group exhibited greater BOLD response than controls in affective somatosensory processing areas such as the posterior cingulate cortex and the insula. The amplitude of response in the insula in response to the unpleasant texture was positively correlated with social impairment as measured by the Autism Diagnostic Interview-Revised (ADI-R). These results suggest that people with ASD tend to show diminished response to pleasant and neutral stimuli, and exaggerated limbic responses to unpleasant stimuli, which may contribute to diminished social reward associated with touch, perpetuating social withdrawal, and aberrant social development. En ligne : http://dx.doi.org/10.1002/aur.1224 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=179
in Autism Research > 5-4 (August 2012) . - p.231-44[article] Perceptual and Neural Response to Affective Tactile Texture Stimulation in Adults with Autism Spectrum Disorders [Texte imprimé et/ou numérique] / Carissa J. CASCIO, Auteur ; Estephan J. MOANA-FILHO, Auteur ; Steve GUEST, Auteur ; Mary Beth NEBEL, Auteur ; Jonathan WEISNER, Auteur ; Grace T. BARANEK, Auteur ; Gregory ESSICK, Auteur . - 2012 . - p.231-44.
Langues : Anglais (eng)
in Autism Research > 5-4 (August 2012) . - p.231-44
Mots-clés : touch fMRI sensory adults psychophysics affective Index. décimale : PER Périodiques Résumé : Autism spectrum disorders (ASD) are associated with differences in sensory sensitivity and affective response to sensory stimuli, the neural basis of which is still largely unknown. We used psychophysics and functional magnetic resonance imaging (fMRI) to investigate responses to somatosensory stimulation with three textured surfaces that spanned a range of roughness and pleasantness in a sample of adults with ASD and a control group. While psychophysical ratings of roughness and pleasantness were largely similar across the two groups, the ASD group gave pleasant and unpleasant textures more extreme average ratings than did controls. In addition, their ratings for a neutral texture were more variable than controls, indicating they are less consistent in evaluating a stimulus that is affectively ambiguous. Changes in brain blood oxygenation level-dependent (BOLD) signal in response to stimulation with these textures differed substantially between the groups, with the ASD group exhibiting diminished responses compared to the control group, particularly for pleasant and neutral textures. For the most unpleasant texture, the ASD group exhibited greater BOLD response than controls in affective somatosensory processing areas such as the posterior cingulate cortex and the insula. The amplitude of response in the insula in response to the unpleasant texture was positively correlated with social impairment as measured by the Autism Diagnostic Interview-Revised (ADI-R). These results suggest that people with ASD tend to show diminished response to pleasant and neutral stimuli, and exaggerated limbic responses to unpleasant stimuli, which may contribute to diminished social reward associated with touch, perpetuating social withdrawal, and aberrant social development. En ligne : http://dx.doi.org/10.1002/aur.1224 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=179 Tactile Perception in Adults with Autism: a Multidimensional Psychophysical Study / Carissa J. CASCIO in Journal of Autism and Developmental Disorders, 38-1 (January 2008)
[article]
Titre : Tactile Perception in Adults with Autism: a Multidimensional Psychophysical Study Type de document : Texte imprimé et/ou numérique Auteurs : Carissa J. CASCIO, Auteur ; Grace T. BARANEK, Auteur ; Francis MCGLONE, Auteur ; Stephen FOLGER, Auteur ; Vinay TANNAN, Auteur ; Kevin A. PELPHREY, Auteur ; Gregory ESSICK, Auteur Année de publication : 2008 Article en page(s) : p.127-137 Langues : Anglais (eng) Mots-clés : Autism Sensory Tactile Psychophysics CT-afferents Index. décimale : PER Périodiques Résumé : Although sensory problems, including unusual tactile sensitivity, are heavily associated with autism, there is a dearth of rigorous psychophysical research. We compared tactile sensation in adults with autism to controls on the palm and forearm, the latter innervated by low-threshold unmyelinated afferents subserving a social/affiliative submodality of somatosensation. At both sites, the groups displayed similar thresholds for detecting light touch and innocuous sensations of warmth and cool, and provided similar hedonic ratings of the pleasantness of textures. In contrast, increased sensitivity to vibration was seen in the autism group on the forearm, along with increased sensitivity to thermal pain at both sites. These findings suggest normal perception along with certain areas of enhanced perception in autism, consistent with previous studies.
En ligne : http://dx.doi.org/10.1007/s10803-007-0370-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=316
in Journal of Autism and Developmental Disorders > 38-1 (January 2008) . - p.127-137[article] Tactile Perception in Adults with Autism: a Multidimensional Psychophysical Study [Texte imprimé et/ou numérique] / Carissa J. CASCIO, Auteur ; Grace T. BARANEK, Auteur ; Francis MCGLONE, Auteur ; Stephen FOLGER, Auteur ; Vinay TANNAN, Auteur ; Kevin A. PELPHREY, Auteur ; Gregory ESSICK, Auteur . - 2008 . - p.127-137.
Langues : Anglais (eng)
in Journal of Autism and Developmental Disorders > 38-1 (January 2008) . - p.127-137
Mots-clés : Autism Sensory Tactile Psychophysics CT-afferents Index. décimale : PER Périodiques Résumé : Although sensory problems, including unusual tactile sensitivity, are heavily associated with autism, there is a dearth of rigorous psychophysical research. We compared tactile sensation in adults with autism to controls on the palm and forearm, the latter innervated by low-threshold unmyelinated afferents subserving a social/affiliative submodality of somatosensation. At both sites, the groups displayed similar thresholds for detecting light touch and innocuous sensations of warmth and cool, and provided similar hedonic ratings of the pleasantness of textures. In contrast, increased sensitivity to vibration was seen in the autism group on the forearm, along with increased sensitivity to thermal pain at both sites. These findings suggest normal perception along with certain areas of enhanced perception in autism, consistent with previous studies.
En ligne : http://dx.doi.org/10.1007/s10803-007-0370-8 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=316