[Connections between cat brain visual cortex fields 18 and 19 passing through the white matter].
Distribution of degenerating synaptic boutons in fields 18 and 19 of the cat cerebral visual cortex was studied in every layer electron microscopically after the white substance was dissected under one of these fields. It was demonstrated that the V-shaped system under investigation consisting of associative fibres connects four superficial cortical layers (in layers V and VI of fields 18 and 19 no altered synapses were detected), while the intracortical system of conductors unites all six layers of the fields mentioned. The number of synapses, degenerating ones including, terminating on large and small dendrites and on thorns of every layer of fields 18 and 19 were counted. Possible functional differences between intracortical and V-shaped systems of the associative fibres in fields 18 and 19 of the cat visual cortex is discussed.
D000818:Animals; D002415:Cats; D003712:Dendrites / Q000648:ultrastructure; D008854:Microscopy, Electron; D009434:Neural Pathways / Q000648:ultrastructure; D009457:Neuroglia / Q000648:ultrastructure; D013569:Synapses / Q000648:ultrastructure; D014793:Visual Cortex / Q000648:ultrastructure*
Sviazi mezhdu poliami 18 i 19 zritel'noĭ kory mozga koshki, prokhodiashchie cherez beloe veshchestvo.