[Histoarchitectonics of the cholinergic innervation of the frog tongue].

Acetylcholinesterase (AChE) activity was studied in dorsal tongue surface structures and in both tongue nerves (hypoglossal and glossopharyngeal) of frogs (Rana temporaria). AChE was found in nerve fibers of fungiform and filiform papillae, blood vessels, glandular ducts of tongue mucosa, both nerve fibers and also in the bodies of cholinergic neurons in subepithelial connective tissue and along the glossopharyngeal nerve. Their parasympathetic origin was suggested.

[Certain problems in the autonomic innervation of acupuncture zones of human skin].

Cholinergic and adrenergic components of vegetative innervation in acupuncture zones of the human skin (in acupuncture "points") were studied by the histochemical method for acetylcholine esterase and by the method of luminescent microscopy. Skin samples were obtained by means of biopsy. In 23 corporal acupuncture zones in the skin, cholinergic nerve conductors and terminals were found to be concentrated and structurally connected with multiple vessels of the skin and its derivatives: sweat glands, folliculi of the fluffy hairs and smooth muscles.

Functional state of adrenergic innervation of the stomach in rats with different stability of cardiovascular functions in experimental stress.

Stress is induced in male Wistar and August rats by immobilising them for 30 hours. Nerve endings were studied using the method of fluorescent microscopy of Falck and Owman, modified by E. M.

[Possible nature of the biogenic amine in the dumbbell-shaped cells of frog taste buds].

An attempt was made to identify specific monoamines contained in the dumb-bell shape cells of the frog taste bud by means of histochemical analysis. It was shown by fluorescent microscopy that preliminary administration of exogenous serotonin into the blood channel of frog tongue resulted in a sharp increase of specific fluorescence of the dumb-bell shape cells, whereas serotonin synthesis inhibition with p-chlorphenylalanine led to reduction and elimination of specific fluorescence. It was concluded that-specific monoamine of the dumb-bell shape cells was possibly of serotonin-like nature.

[Disorders in the adrenergic innervation of the stomachs of rats with stable regulation of cardiovascular function in the presence of emotional stress].

Changes of arterial pressure and of the frequency of cardiac contractions were analyzed in Wistar rats under acute immobilization stress; stability of the cardiovascular functions under emotional stress was revealed. An increased sensitivity of the adrenergic component of the sympathetic and parasympathetic innervation of the stomach that caused the development of its dystrophic processes was observed. Emotional stress proved to be accompanied by phasic dynamics of disorders in the adrenergic innervation: mobilization in the adrenergic innervation was followed by its exhaustion.

[Effect of sensory and sympathetic denervation of the frog tongue on the catecholamine containing cells of the taste buds].

The structure of catecholamine-containing dumb-bell shaped cells of the taste buds was studied by luminescent microscopy in the epithelial layer of the frog's tongue (Rana temporaria). On the unilateral section of the lingual nerve, a maintained adrenergic innervation of vessels and of the epithelium was observed, a decreased number of dumb-bell shaped cells in the taste bud, and their significant enlargement, and increased cathecholamine luminescence. With desympathization, no adrenergic nerves were observed on the vessels and the epithelium of the tongue.

[The neuronal composition of the intramural nerve plexi of the gastrointestinal tract].

The neuronal population of the intramural ganglia of the gastrointestinal tract was studied in cats by the method of fluorescent microscopy. Three neuronal populations were revealed in the intramural ganglia of the intact animals. The first population showed no specific catecholamine fluorescence.

Catecholamine-containing cells of the taste buds in the tongue of the frog (Rana temporaria).

In a study of the epithelial layer and taste buds of the tongue of the frog using fluorescence, peculiar dumb-bell shaped cells were found in the taste buds of fungiform papillae and these showed a highly-positive reaction to catecholamines. Adrenergic nerve fibres were detected in the vessels of the taste bud and in the epithelium of the tongue. Under conditions of catecholamine deficiency produced by preliminary reserpinization of frogs a decrease in specific fluorescence of the cells and the nerves was observed.