[Organisation of thalamic projections of striopallidum in the dog brain].
The experiments, using the technique of double luminescent labelling, were performed to study the distribution pattern of labelled neurons in thalamic nuclei depending on location of injected luminescent label in functionally similar or functionally diverse areas of striopallidum in the brain of 16 dogs. The peculiarities found in the organization of canine thalamo-striopallidum projection system indicate high level of its specificity, as it was found that not only motor and limbic areas of striopallidum, but also its functionally related areas receive mainly, the separate inputs from different cell groups. The centromedian nucleus was found to contain the groups of diffusely mixed cells, containing double labelling, that innervate functionally different segments of nucleus caudatum. In the centromedian, parafascicular, central medial and mediodorsal thalamic nuclei, projection neurons form similar cell populations, innervating different segments of striopallidum structures, related to the single functional system. The same striopallidum areas receive projections from a small number of neurons by axonal collaterals.
Laboratory of Higher Nervous Activity, RAS I.P. Pavlov Institute of Physiology, St. Petersburg.
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AI
Gorbachevskaia
O G
OG
Chivileva
D000344:Afferent Pathways / Q000033:anatomy & histology*; D000818:Animals; D001931:Brain Mapping; D004285:Dogs; D005456:Fluorescent Dyes; D005917:Globus Pallidus / Q000033:anatomy & histology* / Q000166:cytology / Q000502:physiology; D006651:Histocytochemistry; D013787:Thalamic Nuclei / Q000033:anatomy & histology* / Q000166:cytology / Q000502:physiology
D005456:Fluorescent Dyes