| Abstract: | Organization of cortical projections in dorsal and ventral segments of putamen rostral and caudal regions was studied in dogs using retrograde axonal transport of horse radish peroxidase. Dorsal region was shown to receive projections from neo- and mesocortex, while ventral is linked with all cortical units: neo-, meso- and allocortex. Dorsal part of putamen is to greater extent connected with cortical fields, relating to motor aspects of behavior (motor, premotor and somatosensory). Ventral region basically receives projections from the so called limbic cortical fields (cingular, insulary, orbital, periamygdalary and perirhinal). However, results of the present study do not allow to conclude on absolute division of projections of functionally different systems and only indicate the prevalence of one of them in certain topographic zone of the structure studied, i.e. elements of distinctive topography. consisting in presence of dorsal motor and ventral limbic morpho-functional regions are characteristic for dog putamen. No diversities in distribution of cortical projectional fibres along rostrocaudal axis of the structure were revealed. Initial neurons, projecting in putamen are of multilaminary localisation in the cortex. |
