PATTERNS OF INTERHEMISPHERIC AND STRIATE-PERISTRIATE CONNECTIONS IN VISUAL-CORTEX OF THE SOUTH-AMERICAN MARSUPIAL MARMOSA-ELEGANS (MOUSE OPOSSUM)

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dc.contributor.authorBRAVO, H
dc.contributor.authorOLAVARRIA, J
dc.contributor.authorMARTINICH, S
dc.date.accessioned2025-01-23T19:23:24Z
dc.date.available2025-01-23T19:23:24Z
dc.date.issued1990
dc.description.abstractWe have analyzed the distributions of interhemispheric and striate-peristriate connections in the South American marsupial, Marmosa elegans (mouse opossum). Following multiple injections of horseradish peroxidase (HRP) into one hemisphere, we found that anterogradely labeled terminations and retrogradely labeled perikarya are distributed unevenly in the contralateral hemisphere, forming a distinct tangential pattern in striate and peristriate cortex. This pattern delineates as many as eight peristriate areas relatively poor in commissural connections in lateral peristriate cortex, and in lateral and anterolateral portions of peristriate cortex. Single injections of HRP conjugated with wheat germ agglutinin into anterior or posterior regions of striate cortex produced as many as nine discrete ipsilateral fields of labeled perikarya, and terminations distributed over a broad cortical area in lateral and anterolateral peristriate cortex. Our observations of multiple areas with little or no HRP labeling in the interhemisferic pattern, and of multiple ipsilateral striate projection fields, indicate that the topography of visual cortex in Marmosa is highly elaborate, and suggest that extrastriate cortex is subdivided into several visual areas. Furthermore, by showing that the organization of visual cortex in this marsupial is as complex as in many placental mammals, our data support the view that a basic cortical plan, consisting of multiple visual areas, appeared early in mammalian evolution.
dc.fuente.origenWOS
dc.identifier.issn0340-2061
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/99206
dc.identifier.wosidWOS:A1990EP49900008
dc.issue.numero6
dc.language.isoen
dc.pagina.final589
dc.pagina.inicio583
dc.revistaAnatomy and embryology
dc.rightsacceso restringido
dc.subjectCORTICO-CORTICAL CONNECTIONS
dc.subjectVISUAL CORTEX
dc.subjectMARSUPIAL-MARMOSA-ELEGANS
dc.subjectHRP TRANSPORT
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titlePATTERNS OF INTERHEMISPHERIC AND STRIATE-PERISTRIATE CONNECTIONS IN VISUAL-CORTEX OF THE SOUTH-AMERICAN MARSUPIAL MARMOSA-ELEGANS (MOUSE OPOSSUM)
dc.typeartículo
dc.volumen182
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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