Non-homogeneous spatial configuration of vibrissae cortical representation in layer IV of the barrel somatosensory cortex

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dc.contributor.authorGuic, Eliana
dc.contributor.authorCarrasco, Ximena
dc.contributor.authorRodriguez, Eugenio
dc.contributor.authorRobles, Ignacio
dc.contributor.authorMerzenich, Michael M.
dc.date.accessioned2024-01-10T13:15:36Z
dc.date.available2024-01-10T13:15:36Z
dc.date.issued2008
dc.description.abstractIn the present experiments we studied exclusive and overlapping cortical representational areas of the vibrissae in layer IV cells, across the entire barrel subfield of the rat somatosensory cortex, looking for evidences that would challenge the present assumptions of homogeneity and symmetry among cortical columns in this sensorial system. Our main findings were that in layer IV of the rat barrel cortex: A) Size of vibrissae cortical representational areas (X=0.4174mm(2); SD=0.025) was not homogeneous, vibrissae in dorsal rows (A-B) had significantly smaller areas than those in ventral rows (D-E), a pattern that repeated itself in arcs 1-4. B) This difference arises from vibrissal representational overlap, and not from variations in exclusive zones, which are surprisingly homogeneous in size across the barrel cortex (X=0.079mm(2); SD=0.0075), C) The extent of overlapping cortical areas varied systematically, with intra-row overlapping areas having a predominant bias (71.4% of total overlapping) independent of area sizes. Accordingly, vibrissae shared receptive fields with an average of 1.15 vibrissae in the same row and 0.38 in the same arc. Barrel cortex has been viewed operationally as a conglomerate of essentially homogenous cortical columns that interact equivalently in the ire and row dimensions. Our simple but global cortical reconstructions show that this predominant view should be revised. We postulate that the vibrissae/barrels spatial disposition in rows and arcs has a relevant functional meaning, related to different sensory capabilities.
dc.description.funderDIUC
dc.description.funderFONDECYT
dc.fechaingreso.objetodigital2024-06-14
dc.format.extent11 páginas
dc.fuente.origenWOS
dc.identifier.doi10.4067/S0716-97602008000400011
dc.identifier.issn0716-9760
dc.identifier.pubmedidMEDLINE:19621126
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78515
dc.identifier.wosidWOS:000264574400011
dc.information.autorucPsicología;Guic E;S/I;99859
dc.information.autorucPsicología;Rodriguez E ;S/I;65567
dc.issue.numero4
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final471
dc.pagina.inicio461
dc.publisherSOC BIOLGIA CHILE
dc.revistaBIOLOGICAL RESEARCH
dc.rightsacceso restringido
dc.subjectcortical representation
dc.subjectbarrel cortex
dc.subjectevoked activity
dc.subjectrat
dc.subjectsomatosensory cortex
dc.subjectspatial configuration
dc.subjectSURROUND RECEPTIVE-FIELDS
dc.subjectDEPENDENT PLASTICITY
dc.subjectSENSORY CORTEX
dc.subjectADULT OWL
dc.subjectRAT
dc.subjectORGANIZATION
dc.subjectMOUSE
dc.subjectREORGANIZATION
dc.subjectMAPS
dc.subjectDYNAMICS
dc.titleNon-homogeneous spatial configuration of vibrissae cortical representation in layer IV of the barrel somatosensory cortex
dc.typeartículo
dc.volumen41
sipa.codpersvinculados99859
sipa.codpersvinculados65567
sipa.indexWOS
sipa.indexScielo
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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