[The quantitative morphological characteristics of the spinal neurons in the kitten developing under conditions of limited afferent input].

Golgi preparations of cervical part of the spinal cord were used to study sparely and densely branching neurons of lamina VII, sparely and densely branching neurons of lamina VIII and large densely branching motor neurons of lamina IX in 30-day kittens developing under the conditions of limited reticulospinal input. Limitation was induced by electrocoagulation of bulbar magnocellular nucleus and caudal reticular pontine nucleus performed at the 7th day. Computerized morphometry revealed that partial deafferentation affects the geometry in all studied cell types except densely branching neurons of lamina VIII.

[The quantitative morphological characteristics of the neurons of the anterior horns of the spinal cord in the kitten].

Golgi preparations of cervical part of the spinal cord of 30-day kittens were used to study sparely and densely branching neurons of lamina VII, sparely and densely branching neurons of lamina VIII and big densely branching motor neurons (as classified by Leontovich) of medial and lateral regions of lamina IX. Qualitative morphological characteristics of geometry of each cell type were obtained by the method of computerized morphometry. The details of the structure of neurons belonging to different laminae of grey matter are discussed.

[Dendrite orientation in neurons of the reticular brain stem nuclei of a kitten after oral deafferentation].

Deviations in orientation of dendrites in neurons of the reticular brainstem nuclei are demonstrated in the Golgi preparations of the brain of 30-day old kittens by means of the computerized morphometry. Changes in the density of dendrite orientation occurring after bilateral and unilateral lingual nerve section are considered with respect to the following afferent inputs: midline structures and trigeminal and vestibular nuclei.

[The effect of sectioning the lingual nerve on the morphometric characteristics of the reticular nuclei in the brain stem in the kitten].

Three subpopulations of Golgi-stained neurons of the brainstem reticular nuclei have been studied by the method of computer morphometry in 30-day old kittens. 23 parameter of the neuronal geometry were analyzed after uni-and bilateral lingual nerve section 5-7 days after birth. All of cells display statistically valid changes in some parameters, typically differing in every group: for reticular neurons--free distribution of dendrite endings in the dendritic field; for arborescent ones--the length of dendritic segments; for giant multipolar neurons--distribution of foci of maximal dendrite branching in the dendritic field.

[The morphometric characteristics of the neurons of the reticular nuclei in the brain stem in the kitten].

In the brain stem of 30-day-old kittens three types of Golgi-stained neurons are distinguished: sparsely branched reticular neurons, densely branched arborescent neurons and multipolar giant neurons (according to the classification by Leontovich). Implication of the new method of computer morphometry permits obtaining formalized characteristics of 23 parameters of the above types of neurons. An analysis of the quantitative characteristics of the studied neurons has revealed statistically significant differences in most parameters.