Laminar organization of the intrinsic connection neurons and their axon terminals in the lateral suprasylvian cortex of the cat.
The lateral suprasylvian cortex (LS) of the cat has numerous interconnections with other visual cortical areas, as well as with subcortical structures implicated in visually-guided behavior. However, little data are available regarding connections within the LS itself. In order to investigate the intrinsic connections within LS, we have examined the laminar patterns of terminal and cellular labeling following injections of either the anterograde tracer biocytin, or the retrograde tracer, WGA-HRP, into the subregions of the LS (AMLS, PMLS, ALLS, and PLLS). Tracer deposits spanning all cortical layers in a LS subregion basically resulted in labeling of axons and terminals (biocytin cases) or cells of origin (WGA-HRP cases) in all layers, although intensity of the labeling seemed to be different among subregions. The present study demonstrated that the interconnections among LS subregions provide no clear evidence of simple hierarchial relationships between regions.
Department of Neurobiology and Anatomy, Niigata University School of Medicine, Japan.
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Kase
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Hoshino
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Norita
D000818:Animals; D001370:Axonal Transport / Q000187:drug effects; D001369:Axons / Q000187:drug effects; D002415:Cats; D007395:Interneurons / Q000166:cytology* / Q000187:drug effects; D008239:Lysine / Q000008:administration & dosage / Q000031:analogs & derivatives; D017729:Presynaptic Terminals / Q000187:drug effects; D014793:Visual Cortex / Q000033:anatomy & histology* / Q000166:cytology; D014795:Visual Pathways / Q000033:anatomy & histology / Q000187:drug effects; D018998:Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate / Q000008:administration & dosage
D018998:Wheat Germ Agglutinin-Horseradish Peroxidase Conjugate; C013411:biocytin; D008239:Lysine