HapticV1, PascalFrancis, Corpus, bibRecord, 000F51

Abilities in tactile discrimination of textures in adult rats exposed to enriched or impoverished environments

Identifieur interne : 000F51 ( PascalFrancis/Corpus ); précédent : 000F50; suivant : 000F52

Abilities in tactile discrimination of textures in adult rats exposed to enriched or impoverished environments

Auteurs : Stéphanie Bourgeon ; Christian Xerri ; Jacques-Olivier Coq

Source :

Behavioural brain research [ 0166-4328 ] ; 2004.

RBID : Pascal:04-0444943

Descripteurs français

Pascal (Inist)
- Enrichissement milieu, Discrimination stimulus, Stimulus mécanique, Tactisme, Cortex somatosensoriel, Rattus norvegicus, Etude en laboratoire.

English descriptors

KwdEn :
- Laboratory study, Mechanical stimulus, Medium enrichment, Rattus norvegicus, Somatosensory cortex, Stimulus discrimination, Taxis.

Abstract

In previous studies, we have shown that housing in enriched environment for about 3 months after weaning improved the topographic organization and decreased the size of the receptive fields (RFs) located on the glabrous skin surfaces in the forepaw maps of the primary somatosensory cortex (SI) in rats [Exp. Brain Res. 121 (1998) 191]. In contrast, housing in impoverished environment induced a degradation of the SI forepaw representation, characterized by topographic disruptions, a reduction of the cutaneous forepaw area and an enlargement of the glabrous RFs [Exp. Brain Res. 129 (1999) 518]. Based on these two studies, we postulated that these representational alterations could underlie changes in haptic perception. Therefore, the present study was aimed at determining the influence of housing conditions on the rat's abilities in tactile texture discrimination. After a 2-month exposure to enriched or impoverished environments, rats were trained to perform a discrimination task during locomotion on floorboards of different roughness. At the end of every daily behavioral session, rats were replaced in their respective housing environment. Rats had to discriminate homogeneous (low roughness) from heterogeneous floorboards (combination of two different roughness levels). To determine the maximum performance in texture discrimination, the roughness contrast of the heterogeneous texture was gradually reduced, so that homogeneous and heterogeneous floorboards became harder to differentiate. We found that the enriched rats learned the first steps of the behavioral task faster than the impoverished rats, whereas both groups exhibited similar performances in texture discrimination. An individual "predilection" for either homogeneous or heterogeneous floorboards, presumably reflecting a behavioral strategy, seemed to account for the absence of differences in haptic discrimination between groups. The sensory experience depending on the rewarded texture discrimination task seems to have a greater influence on individual texture discrimination abilities than the sensorimotor experience related to housing conditions.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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Format Inist (serveur)

NO :	PASCAL 04-0444943 INIST
ET :	Abilities in tactile discrimination of textures in adult rats exposed to enriched or impoverished environments
AU :	BOURGEON (Stéphanie); XERRI (Christian); COQ (Jacques-Olivier)
AF :	UMR 6149 Neurobiologie Intégrative et Adaptative, Université de Provence-CNRS/Marseille/France (1 aut., 2 aut., 3 aut.)
DT :	Publication en série; Niveau analytique
SO :	Behavioural brain research; ISSN 0166-4328; Coden BBREDI; Irlande; Da. 2004; Vol. 153; No. 1; Pp. 217-231; Bibl. 113 ref.
LA :	Anglais
EA :	In previous studies, we have shown that housing in enriched environment for about 3 months after weaning improved the topographic organization and decreased the size of the receptive fields (RFs) located on the glabrous skin surfaces in the forepaw maps of the primary somatosensory cortex (SI) in rats [Exp. Brain Res. 121 (1998) 191]. In contrast, housing in impoverished environment induced a degradation of the SI forepaw representation, characterized by topographic disruptions, a reduction of the cutaneous forepaw area and an enlargement of the glabrous RFs [Exp. Brain Res. 129 (1999) 518]. Based on these two studies, we postulated that these representational alterations could underlie changes in haptic perception. Therefore, the present study was aimed at determining the influence of housing conditions on the rat's abilities in tactile texture discrimination. After a 2-month exposure to enriched or impoverished environments, rats were trained to perform a discrimination task during locomotion on floorboards of different roughness. At the end of every daily behavioral session, rats were replaced in their respective housing environment. Rats had to discriminate homogeneous (low roughness) from heterogeneous floorboards (combination of two different roughness levels). To determine the maximum performance in texture discrimination, the roughness contrast of the heterogeneous texture was gradually reduced, so that homogeneous and heterogeneous floorboards became harder to differentiate. We found that the enriched rats learned the first steps of the behavioral task faster than the impoverished rats, whereas both groups exhibited similar performances in texture discrimination. An individual "predilection" for either homogeneous or heterogeneous floorboards, presumably reflecting a behavioral strategy, seemed to account for the absence of differences in haptic discrimination between groups. The sensory experience depending on the rewarded texture discrimination task seems to have a greater influence on individual texture discrimination abilities than the sensorimotor experience related to housing conditions.
CC :	002A13C04; 002A26C09
FD :	Enrichissement milieu; Discrimination stimulus; Stimulus mécanique; Tactisme; Cortex somatosensoriel; Rattus norvegicus; Etude en laboratoire
FG :	Rodentia; Mammalia; Vertebrata; Facteur milieu; Voie somesthésique; Encéphale; Système nerveux central
ED :	Medium enrichment; Stimulus discrimination; Mechanical stimulus; Taxis; Somatosensory cortex; Rattus norvegicus; Laboratory study
EG :	Rodentia; Mammalia; Vertebrata; Environmental factor; Somesthetic pathway; Encephalon; Central nervous system
SD :	Enriquecimiento medio; Discriminación estímulo; Estímulo mecánico; Tactismo; Corteza somatosensorial; Rattus norvegicus; Estudio en laboratorio
LO :	INIST-18271.354000120130670240
ID :	04-0444943

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Pascal:04-0444943

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<front><div type="abstract" xml:lang="en">In previous studies, we have shown that housing in enriched environment for about 3 months after weaning improved the topographic organization and decreased the size of the receptive fields (RFs) located on the glabrous skin surfaces in the forepaw maps of the primary somatosensory cortex (SI) in rats [Exp. Brain Res. 121 (1998) 191]. In contrast, housing in impoverished environment induced a degradation of the SI forepaw representation, characterized by topographic disruptions, a reduction of the cutaneous forepaw area and an enlargement of the glabrous RFs [Exp. Brain Res. 129 (1999) 518]. Based on these two studies, we postulated that these representational alterations could underlie changes in haptic perception. Therefore, the present study was aimed at determining the influence of housing conditions on the rat's abilities in tactile texture discrimination. After a 2-month exposure to enriched or impoverished environments, rats were trained to perform a discrimination task during locomotion on floorboards of different roughness. At the end of every daily behavioral session, rats were replaced in their respective housing environment. Rats had to discriminate homogeneous (low roughness) from heterogeneous floorboards (combination of two different roughness levels). To determine the maximum performance in texture discrimination, the roughness contrast of the heterogeneous texture was gradually reduced, so that homogeneous and heterogeneous floorboards became harder to differentiate. We found that the enriched rats learned the first steps of the behavioral task faster than the impoverished rats, whereas both groups exhibited similar performances in texture discrimination. An individual "predilection" for either homogeneous or heterogeneous floorboards, presumably reflecting a behavioral strategy, seemed to account for the absence of differences in haptic discrimination between groups. The sensory experience depending on the rewarded texture discrimination task seems to have a greater influence on individual texture discrimination abilities than the sensorimotor experience related to housing conditions.</div>
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<server><NO>PASCAL 04-0444943 INIST</NO>
<ET>Abilities in tactile discrimination of textures in adult rats exposed to enriched or impoverished environments</ET>
<AU>BOURGEON (Stéphanie); XERRI (Christian); COQ (Jacques-Olivier)</AU>
<AF>UMR 6149 Neurobiologie Intégrative et Adaptative, Université de Provence-CNRS/Marseille/France (1 aut., 2 aut., 3 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Behavioural brain research; ISSN 0166-4328; Coden BBREDI; Irlande; Da. 2004; Vol. 153; No. 1; Pp. 217-231; Bibl. 113 ref.</SO>
<LA>Anglais</LA>
<EA>In previous studies, we have shown that housing in enriched environment for about 3 months after weaning improved the topographic organization and decreased the size of the receptive fields (RFs) located on the glabrous skin surfaces in the forepaw maps of the primary somatosensory cortex (SI) in rats [Exp. Brain Res. 121 (1998) 191]. In contrast, housing in impoverished environment induced a degradation of the SI forepaw representation, characterized by topographic disruptions, a reduction of the cutaneous forepaw area and an enlargement of the glabrous RFs [Exp. Brain Res. 129 (1999) 518]. Based on these two studies, we postulated that these representational alterations could underlie changes in haptic perception. Therefore, the present study was aimed at determining the influence of housing conditions on the rat's abilities in tactile texture discrimination. After a 2-month exposure to enriched or impoverished environments, rats were trained to perform a discrimination task during locomotion on floorboards of different roughness. At the end of every daily behavioral session, rats were replaced in their respective housing environment. Rats had to discriminate homogeneous (low roughness) from heterogeneous floorboards (combination of two different roughness levels). To determine the maximum performance in texture discrimination, the roughness contrast of the heterogeneous texture was gradually reduced, so that homogeneous and heterogeneous floorboards became harder to differentiate. We found that the enriched rats learned the first steps of the behavioral task faster than the impoverished rats, whereas both groups exhibited similar performances in texture discrimination. An individual "predilection" for either homogeneous or heterogeneous floorboards, presumably reflecting a behavioral strategy, seemed to account for the absence of differences in haptic discrimination between groups. The sensory experience depending on the rewarded texture discrimination task seems to have a greater influence on individual texture discrimination abilities than the sensorimotor experience related to housing conditions.</EA>
<CC>002A13C04; 002A26C09</CC>
<FD>Enrichissement milieu; Discrimination stimulus; Stimulus mécanique; Tactisme; Cortex somatosensoriel; Rattus norvegicus; Etude en laboratoire</FD>
<FG>Rodentia; Mammalia; Vertebrata; Facteur milieu; Voie somesthésique; Encéphale; Système nerveux central</FG>
<ED>Medium enrichment; Stimulus discrimination; Mechanical stimulus; Taxis; Somatosensory cortex; Rattus norvegicus; Laboratory study</ED>
<EG>Rodentia; Mammalia; Vertebrata; Environmental factor; Somesthetic pathway; Encephalon; Central nervous system</EG>
<SD>Enriquecimiento medio; Discriminación estímulo; Estímulo mecánico; Tactismo; Corteza somatosensorial; Rattus norvegicus; Estudio en laboratorio</SD>
<LO>INIST-18271.354000120130670240</LO>
<ID>04-0444943</ID>
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Abilities in tactile discrimination of textures in adult rats exposed to enriched or impoverished environments

Abilities in tactile discrimination of textures in adult rats exposed to enriched or impoverished environments

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