[Primary structural moduli of the dorsal thalamic nuclei and motor cortex in man].

The aim of this work was to study the primary structural modular organization of neurons in dorsal thalamic nuclei (ventral anterior, ventral lateral, anterior medial, anterior ventral, anterior dorsal, medial, nucleus reticularis) and motor cortex (areas 4 and 6) in man using the methods of Nissl, Kluver-Barrera and Golgi silver nitrate impregnation. It was shown that in both dorsal thalamic nuclei and motor cortex neurons had regular organization--they were forming small groups or short chains and meet specific criteria. These neuronal associations, formed single structural units, that were called primary structural moduli.

[Common system of sparsely branched projection (reticular) NADPH-diaphorase neurons in the human forebrain formations built from densely branched cells].

Cell morphometry with statistical analysis (using 9 parameters) of densely branched projection and sparsely branched reticular neurons was performed in the human forebrain formations built from densely branched projection neurons (the entorhinal cortex, striatum, nucleus accumbens basolateral amygdala, and dorsal thalamus). The reticular neurons included scattered reticular neurons and marginal reticular neurons of the dorsal thalamus. Golgi method and staining for NADPH-diaphorase were used.

[Neuronal organization of thalamic nucleus reticularis in adult man].

The neuronal content of human thalamic nucleus reticularis was studied in serial sections cut in sagittal and frontal projections and impregnated with silver nitrate using Golgi method. The neuronal content of human thalamic nucleus reticularis was found to be more diverse than previously reported in animals and man. Besides two types of sparsely-branched long-dendritic spineless R1 and R2 neurons, this nucleus contained spiny cells.

[NADPH-diaphorase positive cells of the human thalamic nuclei and internal capsule].

Isolated NADPH-diaphorase (NADPH-d)-positive neurons were demonstrated in the nuclei of human dorsal thalamus and nucleus reticularis. Staining of NADPH-d-positive neurons with all their processes and preceding study of neurons of dorsal thalamus using Golgi method enabled the identification of their types and their determination as sparsely-branched cells. Main types of efferent densely-branched neurons had no demonstrable NADPH-d activity.

[Neuronal organization of human ventral anterior and ventral lateral thalamic nuclei].

Neuronal composition was studied in two human thalamic nuclei--nucleus ventralis anterior and nucleus ventralis lateralis using serial horizontal and frontal sections stained using Kluver-Barrera and Golgi silver impregnation methods. It was found that the number of neuronal types, composing the nuclei (equal to eight) is greater than previously reported. Proposed neuronal classification based on the characteristics of their processes, in comparison with a similar study performed in dogs (pups) permitted to distinguish two types of neurons--long-axon and short-axon.