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Plasticity in primary somatosensory cortex resulting from environmentally enriched stimulation and sensory discrimination training Biol. Res.
GUIC,ELIANA; CARRASCO,XIMENA; RODRÍGUEZ,EUGENIO; ROBLES,IGNACIO; MERZENICH,MICHAEL M.
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...
Tipo: Journal article Palavras-chave: Cortical plasticity; Roughness discrimination; Environmental enrichment; Barrel cortex; Active exploration.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000400008
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