R. A. Durinyan

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Stereotaxic fluid microinjections of horseradish peroxidase into different parts of the rostral and caudal periaqueductal grey (PAG) in cats have provided substantial retrograde evidence that the somatosensory cortex (I and II), frontal cortex, insular and cingular cortex are the principal sources of cortical-PAG projections. The somatosensory cortex II(More)
1. AN consists of afferent fibers belonging to the A-delta group. 2. Electrical stimulation of AN fibers, with an intensity equivalent to non-noxious stimulation, is sufficient to activate fibers of the dorsal and ventral trigeminal tracts and also neurons of the caudal trigeminal nucleus at a level 3 mm caudally to the obex. 3. Neuronal units of the(More)
The cerebral cortex plays an important role in the control of conduction of afferent information at different levels of the CNS [i, 3]. This control is effected also on the trigeminal nuclei [7, 87 i0], which play an important role in the formation of pain syndromes and, in particular, in trigeminal neuralgia [5]. As has been shown, electroacupuncture (EAP)(More)
The effects of reflex stimulation on the changes of nociception thresholds in animals before and after ablation of the somatosensory cortex were studied in behavioural experiments on adult cats. Electroacupuncture stimulation (EAP) was shown to increase nociception thresholds at all levels of the conventional scale. The ablation of both the first (S1) and(More)
The results of morphological investigations of degenerated fibers show that the first somatosensory cortical area is connected by descending cortico-thalamic fibers with the posterior ventral nucleus of the thalamus. The second somatosensory area is connected simultaneously with the caudal part of the posterior ventral nucleus and with the posterior group(More)
times of maximal excess of the number of SIS in the hippocampus over their number in the cortex. With a decrease in this gap the fits became shorter in duration, with no more than one or two stages [7], or they ceased completely (Fig. 4). The number and duration of the seizure discharges also diminished or they disappeared. In this case also, to restore the(More)
Studies of the blood picture and bone marrow before and after denervation of various parts of the alimentary canal in animals in series experiments showed that denervation of the caudal part of the small intestine caused the development of a normochromic normocytic anemia; denervation of the duodenum—hyperchromic macrocytic anemia, and denervation of a part(More)
Acute experiments were carried out on 17 cats anesthetized with hexobarbital (40 mg/kg, intraperitoneally), immobilized with suxamethonium, and maintained on artificial ventilation of the lungs. After fixation of the animal in a stereotaxic apparatus and trephining of the skull all regions of operative procedures were infiltrated with local anesthetic.(More)
The effect of duodenal denervation upon the blood system was studied in conditions of chronic experiment (5–6 months) in 8 male cats. Six control male cats were investigated simultaneously. Two waves of anemia development were observed: the first-hypochromic, microcytic anemia of regenerative type; the second-hyperchromic, macrocytic anemia of(More)
In work with experimental animals, fast and reliable fixation is needed. As far as fixation of the extremities is concerned, it is well known that this problem has a simple so lu t iont h e paws are tied to the operating table, and this seems to satisfy everybody. But the problem of fixation of the head is far from being solved. The old type of head-holder(More)