Yu. M. Pelevin

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The ultrastructural organization of neurosecretory cells (NSC) belonging to the hypothalamic supraoptic nucleus was investigated in young rats following periods of painful stress differing in duration (of 2 and 20 min). Intact young rats of similar age and others at late stages of development (24–27 months old) served as controls. Short- and longer-acting(More)
An electron microscopy study was made of synaptic organization in the cat association cortex, area 5b. A total of 1635 axonal terminals were discovered over 6215 µm2 (240 electronic imagings of slices of different association cortex layers); i.e., an average of 263±16 terminals per 1000 µm2 expanse. It was found that 75.5% of axon terminals contained(More)
An electron-microscopic investigation was made of the synaptic organization of the supraoptic nucleus (SON) of the albino rat hypothalamus before and after electrolytic destruction of fibers of the medial forebrain bundle (MFB). Two types of axon terminals, tentatively of cholinergic (type I) and monoaminergic (type II) nature, are described in the nucleus.(More)
Numbers of intact and degenerating axonal terminals (AT) were determined in area 5b of the cat association cortex two, four, and 30 days after electrolytic destruction of the posterolateral thalamic nucleus (PL). The proportion of degenerating AT in area 5b two and four days after PL lesion was found to be 7.4 and 7.3%, respectively. Intact AT in the same(More)
Differences in the location of putative inhibitory (F-type) synapses were revealed during research into the ultrastructural organization of the chemically sensitive cat ventrolateral medulla (VLM). These synapses are made up of axonal terminals filled with flattened synaptic vesicles with the long axis measuring 60–80 nm. They are mainly located in the(More)
Bilateral electrolytic destruction of the paramedian zones of the caudal part of the tegmentum mesencephali caused an increase in the number of neurosecretory cells with low functional activity and the appearance of degenerating forms in the supraoptic nucleus of the hypothalamus (mainly in the medial part of the nucleus, adjacent to the optic chiasma);(More)
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