title: [The afferent and efferent connections of field 7 in the parietal cortex with field 18a of the visual cortex in the rat].
abstract: By means of administration of horseradish peroxidase to the field 7 in the parietal cortex of rat, studies have been made on antero- and retrograde axonal transport of the enzyme to reveal bilateral connections of this field with the field 18a of the visual cortex. It was shown that the field 18a is a source of afferent fibers which reach the field 7, more evident projections being observed at the ipsilateral side. Labeled neurones in the field 18a were found mostly in layer III, and to a lesser extent-in layer V. Single labeled neurones were also found in layers II and VI. Labeled terminals of efferent fibers originating from cells in the field 7 were located in layers I, II-III and V of the field 18a. Maximum density of the terminals was registered in layer II-III, less one in layer V, and very negligible-in layer I. It should be noted that labeled terminals were revealed in those cortical regions, which contained labeled neurones which gave origin to afferent fibers to the field 7.
authors.forename: L M
authors.initials: LM
authors.lastname: Nomokonova
authors.forename: N Ia
authors.initials: NIa
authors.lastname: Sologub
authors.forename: B F
authors.initials: BF
authors.lastname: Tolkunov
mesh_terms: D000344:Afferent Pathways / Q000166:cytology / Q000502:physiology; D000818:Animals; D001931:Brain Mapping / Q000379:methods*; D004525:Efferent Pathways / Q000166:cytology / Q000502:physiology; D006735:Horseradish Peroxidase; D008297:Male; D009474:Neurons / Q000166:cytology / Q000502:physiology; D010296:Parietal Lobe / Q000166:cytology / Q000502:physiology*; D051381:Rats; D014793:Visual Cortex / Q000166:cytology / Q000502:physiology*
chemical_list: D006735:Horseradish Peroxidase
vernacular_title: Afferentnye i éfferentnye sviazi polia 7 parietal'noĭ kory s polem 18a zritel'noĭ kory krysy.