The occurrence of foeveola palatina was studied in 264 patients. The distance of the foveola palatina from the papilla incisiva and palatinal raphe was measured. Light and electron microscopic examinations were carried out on specimens obtained from cadavers. It was found that ducts of functioning mucous glands open into the foveolar lumen lined by stratified epithelium.

Adult↗

PubMed1978

Quantitative histological studies on the lateral geniculate nucleus in the cat. IV. Numerical aspects of the transfer from restinal fibers to cortical relay.

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 the number of relay neurons in layer A and A1. Knowing the different numerical and metrical counts of neuronal elements in LGN of cat some calculations were carried out on the overlaping of optic fiber arborizations, on the intersections of dendritic ramification points of relay neurons and on the spatial arrangement of both the optic terminals and the relay neurons. The comparison of the neumerical data on relay neurons and optic fibers and their relations were the basic factors of considerations on divergence and convergence of retinal input.

Animals↗

PubMed1978

Quantitative histological studies on the lateral geniculate nucleus in the cat. I. Measurements on Golgi material.

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 quantitative data on arely neurons include numbers of dendrites, of their chief points of ramification as the main targets of the optic afferents, geometric data on the "specific active sphere" of the dendritic tree; on the arborization of initial collaterals. The data on interneurons refer both to numeric and geometric parameters of their axonal arborizations, and to those of various characteristics of their dendritic processes. The data on optic fibers include the size of their arborization space, the numbers of bouton clusters and preterminal bouquets per arborization.

Animals↗

PubMed1978

Quantitative histological studies on the lateral geniculate nucleus in the cat. II. Cell numbers and densities in the several layers.

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 was combined with the "specific active dendritic sphere" of relay neurons and it could be estimated that there may be a large number of spatially overlaping of ramification points around the cell body of relay neurons.

Animals↗

PubMed1978

Quantitative histological studies on the lateral geniculate nucleus in the cat. III. Distribution of different types of neurons in the several layers of LGN.

An attempt is made on the definition of proportional distribution of the different types of neurons in the layers of LGN by means of quantitative method. On the basis of nuclear volume, nuclear and cell diameters the different types of neurons were separated according to their size and shape. The ratio of relay and interneurons proved to be 2:1 in all layers of LGN of cat. The proportional distribution of further subgroups of neurons was also defined. The bilateral connections between the relay and interneurons based on initial axon collateral of TCR neurons and on axon terminals and dendritic appendages of INs, are also calculated. The interneurons--in the LGN--have widespread contacts with both types of relay neurons, similarly the relay neurons contact the interneurons. The numerical data of morphological observations are accord with the results of physiologists.

Animals↗

PubMedDate not supplied

Restoration problems of the unilateral free-end saddle cases.

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Denture Design↗