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Neurons displaying a thalamo-cortical projection were marked by means of the retrograde transport of horseradish peroxidase (HRP), and the labeled elements were compared with neurons impregnated by the Golgi technique. Injections of HRP into the posterior area of the limbic cortex resulted in its uptake by various anterior thalamic nuclei, especially the(More)
The percentage of neurons that are immunoreactive for the inhibitory neurotransmitter, gamma-aminobutyric acid (GABA) was determined within: (1) the lateral geniculate nucleus (LGN), (2) the ventrobasal complex (VB) and (3) the antero-ventral nucleus (AV) of the thalamus in the cat. An antiserum to GABA was used to stain GABA-containing perikarya in 1.0(More)
Numerical data of neuron and fiber elements were observed and measured on Golgi preparations. The aim of the quantitative Golgi analysis was to obtain data on the spatial arrangement of arely neurons, their relations to the interneurons, on the spatial architecture of the arborizations of optic fibers and their relations to the main neuron types. The(More)
The numerical data, gained both from the quantitative histology and Golgi stained material was completed with those of optic fibers. The number of X and Y fibers was estimated on the basis of our results, on the data of literature and from the ratio of the large and medium size relay neurons. The crossed and uncrossed fibers were counted and compared with(More)
Afferent connections to the ventrobasal complex (VB) of the thalamus were studied by means of retrograde transport of horseradish peroxidase (HRP) and by the Golgi-method. After HRP-injection into the VB, peroxidase-positive cells were observed contralaterally in the dorsal column nuclei (DCN), in the trigeminal nuclei and in the lateral cervical nucleus(More)
In the cat lateral geniculate nucleus all cells of all types were counted: their absolute numbers, their densities and their relative distribution. The nuclear volume and the volume of each layer was measured. The data of volume was applied on living material. The average densities of cells were calculated from the volume of LGN. The density of the cells(More)
The ultrastructure of mossy fibre terminals, granule cells, and pyramidal neurons was studied in cat material. The average of the mossy terminals and the density of the synaptic vesicles were analysed. The large mossy terminals establish mainly axo-spiny synapses on the apical dendrites of pyramidal neurons in the CA3 area, but some axo-dendritic synapses(More)
Morphological modifications of two subcortical vibrissal relays were analyzed, following destruction of vibrissal follicles in newborn mice. The volume of the nucleus interpolaris (NI) of the trigeminal nuclear complex in the brainstem decreased by 33%, while the number of its neuronal perikarya decreased only moderately. Vibrissal deafferentation caused no(More)