VIBRISSAL ROUGHNESS DISCRIMINATION IS BARRELCORTEX-DEPENDENT

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dc.contributor.authorGUICROBLES, E
dc.contributor.authorJENKINS, WM
dc.contributor.authorBRAVO, H
dc.date.accessioned2025-01-23T19:22:06Z
dc.date.available2025-01-23T19:22:06Z
dc.date.issued1992
dc.description.abstractWe have investigated the contribution of the neocortical vibrissal representation within the posterior medial barrel subfield (PMBSF) to the high performance levels obtained by rats in a complex roughness discrimination task mediated by vibrissal inputs. Nine binocularly occluded rats were trained in a two-choice roughness discrimination until they obtained the 85% correct response criteria. Subsequently, the PMBSF was localized by electrophysiological recordings and bilaterally ablated. The locus and extent of the cortical lesions were confirmed by histological analysis after additional training and testing. There was no evidence of task retention after the cortical lesion and barrelless rats were unable to obtain prelesion discriminative performance levels when stimulation was restricted solely to vibrissal cues. After extensive postlesion training, four of these rats were allowed to palpate the discriminanda with their forepaws. Under these conditions rats rapidly reached the 85%. correct criterion once again. The present results indicate that the PMBSF is essential for complex tactile discrimination when sensory information is obtained through the vibrissae by active palpation. This deficit is specific for the vibrissal system, the PMBSF is not essential to solve the same tactile discrimination task when the source of the somatosensory information is provided by other non-vibrissal cutaneous sensory receptors.
dc.fuente.origenWOS
dc.identifier.issn0166-4328
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/98964
dc.identifier.wosidWOS:A1992JA49700005
dc.issue.numero2
dc.language.isoen
dc.pagina.final152
dc.pagina.inicio145
dc.revistaBehavioural brain research
dc.rightsacceso restringido
dc.subjectROUGHNESS DISCRIMINATION
dc.subjectPOSTERIOR MEDIAL BARREL SUBFIELD
dc.subjectCORTICAL LESION
dc.subjectVIBRISSAL SYSTEM
dc.subjectRAT
dc.titleVIBRISSAL ROUGHNESS DISCRIMINATION IS BARRELCORTEX-DEPENDENT
dc.typeartículo
dc.volumen48
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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