I B Meliksetian

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The new method for the demonstration of myelinated nerve fibers in the central nervous system is developed. The method is based on the principle of fractional blocking of metalloorganic compounds and the fact of selective reaction of the trivalent (ferric) iron with myelin. The method proposed is not laborious and is simple in utilization.
A new method was developed to demonstrate Ca2+-dependent acid phosphatase activity, that is designed for the study of cytochemical organization of CNS cellular structures. Besides its histochemical significance, this method is of certain morphological interest, as it gives the results, intermediate between those obtained using Nissl's method and silver(More)
Existence of two types of uncoordinated spontaneous activities of the cat ureterbladder area was shown: spikes and slow waves. The oscillation frequency of this area is two-fold lesser than the rhythm of renal waves. The activity concordance of these pacemakers occurs under conditions of ureter dissection in the middle. Normally pacemakers of this area seem(More)
It has been shown the reinforcement of the corticofugal plasticity in adult rats after unilateral ablation of sensorimotor cortex accompanied by intramuscular injections of low concentrations of BT-melanin. In result the process of compensatory recovery in rats central nervous system is accelerated, confirmable by the rapid recovery of previously elaborated(More)
The effects if different concentrations of oxytocin (10(-2), 10(-1), 1 and 10 microg/kg) on burst duration and spikes frequency of spontaneous electrical activity in various parts of uterine horns and uterine corpus in non-pregnant rats have been shown. The changes in given parameters for ovarian parts of horns had similar characters unlike cervical parts(More)
The effects of unilateral transection of bulbar pyramids on instrumental conditioned reflexes in rats were shown to be in direct relationship with the time of its execution. In rats with stable conditioned reflexes, pyramidotomy impaired conditioned performance, on the average, for 3.9 days. However, preliminary transection of the pyramid delayed operant(More)
Chronic insufficiency of adrenal hormones is a pathology leading to brain dysfunction. In electrophysiological studies, by extracellular recording of spike activity of single hippocampal neurons (HN) caused by high-frequency stimulation of the entorhinal cortex (EC) in rats with unilateral removal of adrenal (adrenalectomy - AE), we analyzed mechanisms of(More)
Using calcium-adenosinetriphosphate histoangiological method of Chilingarian, the morpho-functional characteristics of capillary section of microcirculatory bed were studied in cat's brain and dura mater following experimental hypoxia. Analysis of morphometric data has shown that short-term hypoxia resulted in dilation of brain capillary lumen by 15% in(More)
Histamine changed characteristics of the perinephric spontaneous spike activity and of the spreading electrical wave. It was shown that histamine could activate latent pacemakers of the ureter's middle area. Morphological picture of the histamine effect was also shown.