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B S Kulaev

Publications and source records attributed to B S Kulaev.

At least 19 recordsLinked to original sources
PubMed1980

[Establishment of somato-sympathetic reactions during the early stages of postnatal ontogeny in cats].

In adult cats and 1--16--day kittens, repeated stimuli of less than 1/sec and supramaximal strength applied to afferent fibers of nervus ischiadicus evoked the multicomponent responses recorded from efferent fibers of n. hypogastricus. Latencies of responses components decreased during postnatal development. In all the animals basic three responses remained unchanged after Th10-12 chordotomy. Stimulation of kittens afferent somatic fibers with frequency of 10/sec and of variable strength enhanced the sympathetic nerve activity and in rare occasions suppressed it. In adult animals the sign of sympathetic nerve response depended on the level of spontaneous sympathetic activity and on the stimulus strength. This relation remained unchanged after the chordotomy. In chordotomised kittens repeated stimuli applied to somatic nerve produced the sympathetic nerve activation alone.

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PubMed1976

[The growth of axons in the periphery after a decrease in the quantity of nerve cells in sympathetic ganglia].

The amount of cells in stellate ganglia of rat was decreased by chemical sympathectomy to 30% of the normal amount. At the age of two months sympathectomized rats have no pressor reflexes to asphyxia and femoral nerve stimulation. These responses are restored at the age of four months. The electron-microscopic and fluorescence-microscopic data show that the growth of axons in the remaining adrenergic neurons of sympathectomized animals takes place at the age between two and four months.

Age Factors↗
PubMed1975

[Age changes in rat vasomotor reflexes and sympathetic neuron ultrastructure following chemical sympathectomy].

Prolonged administration of guanethidine (20 mg/kg) to newborn rats caused a marked reduction in the number of cells in stellate ganglia. The administration of guanethidine for 14 days decreased the amount of cells to 30% of the normal (partial sympathectomy), and for 28 days--to 0.5% (complete sympathectomy). At the age of two months the blood pressure pressor reflexes to asphyxia and femoral nerve stimulation were absent in both groups of the sympathectomized animals. These responses, however, were restored in the partially sympathectomized animals at the age of four months. No restoration took place in the completely sympathectomized animals. The electron microscopic studies of neurons in the partially sympathectomized animals showed the presence of a great number of neurofibrils. According to literature data this fact was typical of cells in which an active growth of axon fibers took place.

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