Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training

We studied primary-somatosensory cortical plasticity due to selective stimulation of the sensory periphery by two procedures of active exploration in adult rats. Subjects, left with only three adjacent whiskers, were trained in a roughness discrimination task or maintained in a tactile enriched envi...

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Autores principales:	GUIC,ELIANA, CARRASCO,XIMENA, RODRÍGUEZ,EUGENIO, ROBLES,IGNACIO, MERZENICH,MICHAEL M
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2008
Materias:	cortical plasticity roughness discrimination environmental enrichment barrel cortex active exploration
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000400008
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spelling	oai:scielo:S0716-976020080004000082009-06-16Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination trainingGUIC,ELIANACARRASCO,XIMENARODRÍGUEZ,EUGENIOROBLES,IGNACIOMERZENICH,MICHAEL M cortical plasticity roughness discrimination environmental enrichment barrel cortex active exploration We studied primary-somatosensory cortical plasticity due to selective stimulation of the sensory periphery by two procedures of active exploration in adult rats. Subjects, left with only three adjacent whiskers, were trained in a roughness discrimination task or maintained in a tactile enriched environment. Either training or enrichment produced 3-fold increases in the barrel cortex áreas of behaviorally-engaged whisker representations, in their zones of overlap. While the overall áreas of representation expanded dramatically, the domains of exclusive principal whisker responses were virtually identical in enriched vs normal rats and were significantly smaller than either group in roughness discrimination-trained rats. When animáis were trained or exposed to enriched environments with the three whiskers arrayed in an are or row, very equivalent overlaps in representations were recorded across their greatly-enlarged whisker representation zones. This equivalence in distortion in these behavioral preparations is in contradistinction to the normal rat, where overlap is strongly biased only along rows, probably reflecting the establishment of different relations with the neighboring cortical columns. Overall, plasticity phenomena are argued to be consistent with the predictions of competitive Hebbian network plasticity.info:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.41 n.4 20082008-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000400008en10.4067/S0716-97602008000400008
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	cortical plasticity roughness discrimination environmental enrichment barrel cortex active exploration
spellingShingle	cortical plasticity roughness discrimination environmental enrichment barrel cortex active exploration GUIC,ELIANA CARRASCO,XIMENA RODRÍGUEZ,EUGENIO ROBLES,IGNACIO MERZENICH,MICHAEL M Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training
description	We studied primary-somatosensory cortical plasticity due to selective stimulation of the sensory periphery by two procedures of active exploration in adult rats. Subjects, left with only three adjacent whiskers, were trained in a roughness discrimination task or maintained in a tactile enriched environment. Either training or enrichment produced 3-fold increases in the barrel cortex áreas of behaviorally-engaged whisker representations, in their zones of overlap. While the overall áreas of representation expanded dramatically, the domains of exclusive principal whisker responses were virtually identical in enriched vs normal rats and were significantly smaller than either group in roughness discrimination-trained rats. When animáis were trained or exposed to enriched environments with the three whiskers arrayed in an are or row, very equivalent overlaps in representations were recorded across their greatly-enlarged whisker representation zones. This equivalence in distortion in these behavioral preparations is in contradistinction to the normal rat, where overlap is strongly biased only along rows, probably reflecting the establishment of different relations with the neighboring cortical columns. Overall, plasticity phenomena are argued to be consistent with the predictions of competitive Hebbian network plasticity.
author	GUIC,ELIANA CARRASCO,XIMENA RODRÍGUEZ,EUGENIO ROBLES,IGNACIO MERZENICH,MICHAEL M
author_facet	GUIC,ELIANA CARRASCO,XIMENA RODRÍGUEZ,EUGENIO ROBLES,IGNACIO MERZENICH,MICHAEL M
author_sort	GUIC,ELIANA
title	Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training
title_short	Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training
title_full	Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training
title_fullStr	Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training
title_full_unstemmed	Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training
title_sort	plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training
publisher	Sociedad de Biología de Chile
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000400008
work_keys_str_mv	AT guiceliana plasticityinprimarysomatosensorycortexresultingfromenvironmentallyenrichedstimulationandsensorydiscriminationtraining AT carrascoximena plasticityinprimarysomatosensorycortexresultingfromenvironmentallyenrichedstimulationandsensorydiscriminationtraining AT rodriguezeugenio plasticityinprimarysomatosensorycortexresultingfromenvironmentallyenrichedstimulationandsensorydiscriminationtraining AT roblesignacio plasticityinprimarysomatosensorycortexresultingfromenvironmentallyenrichedstimulationandsensorydiscriminationtraining AT merzenichmichaelm plasticityinprimarysomatosensorycortexresultingfromenvironmentallyenrichedstimulationandsensorydiscriminationtraining
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Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training

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