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A V Akhmadeev

Publications and source records attributed to A V Akhmadeev.

30 records · Page 2Linked to original sources
PubMed2003

[Structural organization of amygdaloid brain complex of the rat].

Amygdala belong to the system of basal nuclei of telencephalon. Amygdala are a complicated structure based on both principles of grey matter organization: nuclear and screen-type, on its territory. Authors investigate into the structure of Amygdala using theory of Zavarzin A. As the result of this study, a classification of components of Amygdala into nuclei, paleocortical and intermediate formations, has been developed.

Amygdala↗
PubMed2003

[Structural and quantitative characteristics of dendrites of amygdaloid posterior neurons of the rat brain].

The objective of this study was to describe the dendritic tree of major neuronal groups in amygdaloid posterior division and to analyze their quantitative characteristics. The peculiarities of neuronal organization were studied using rat brain frontal sections impregnated with Goldgi silver nitrate. Neurons were classified according to criteria developed by Leontovich (1978) and Polyakov (1973). It was found that the major groups of neurons are represented by long-axon sparsely branched, subcortical type long-axon densely branched and cortical type long-axon densely branched. Quantitative studies of seven characteristics of dendritic tree have shown that the most informative parameters of the existing differences between major neuronal groups were the number of branching points and the number of dendrite free ends. The contribution of sparsely branched and densely branched neuronal systems in the nuclei, paleocortex and diencephalic formations is described.

Amygdala↗
PubMed2002

[Hematologic and various immunologic parameters of the body response in experimental epileptogenesis].

The aim of present study was to reveal the figures that show the organism reactivity at various stages of the amygdala kindling. We found that a completed kindling formed by stimulation of the piriform cortex, is accompanied by systemic changes in white and red blood. First stages of kindling during the cortical nucleus stimulation are characterised by reactive changes of erythrocytes and thrombocytes suggesting that changes occur in the homeostasis. We discuss possible mechanisms of these changes.

Amygdala↗
PubMed2000

[Cytologic characteristics of "dark" and "light" cells in the brain amygdaloid complex].

This paper reports data on cytological peculiarities of neurons of two main zones of sexual dimorphism in brain amygdala (dorsomedial nucleus and anterior cortical nucleus). The main attention was paid to some characteristics of "dark" and "pale" cells found in the amygdaloid complex for the first time. It is supposed that the dark and pale cells are targets for gonadal steroids, whose cyclic changes in concentration in the blood difined their functional states. Though the ultrastructure of dark and pale cells of the amygdaloid complex is similar to that of neurosecretory cells of hypothalamus, there are necessary electron microscopic and cytochemical evidences.

Amygdala↗
PubMed2000

[Structural and quantitative characteristics of nuclear and screen-type formation in the amygdaloid body posterior region].

Cytoarchitecture and planimetry of structures of amygdaloid body posterior region were investigated in view of A.A. Zavarzin concepts on nuclear and screen-type centres of nervous system. Amygdaloid body was shown to be a complicated heterogeneous brain formation, the structure of which reflects both basic principles (nuclear and screen-type) of grey substance organization. Structural and quantitative characteristics of the amygdaloid body posterior region provides a confirmation for assumption that it is a nucleo-paleocortical brain component.

Amygdala↗
PubMed1999

[Electron-microscopic characteristics of the dorsomedial nucleus of the brain amygdala].

Dark and light neurons with morphological signs of secretory activity were discovered for the first time in one of the main zones of sexual dimorphism of brain amygdala (dorsomedial nucleus). Dark neurons were of small and medium sizes, contained large nuclei and incompletely developed perikaryon. The latter contained a large number of free ribosomes, dilated cisterns of endoplasmic reticulum, hypertrophied Golgi complex with forming secretory granules and numerous mitochondria. Elementary neurosecretory granules (ENG) 75-180 nm in size were found in light neurosecretory cells that are likely to represent dark neurons at the specific phase of functional activity. Synapses of all known types, containing small light vesicles in their terminals and vesicles with electron-opaque centre and ENG were detected in the extremely active neuropil.

Amygdala↗
PubMed1998

[Structural and functional organization of sexual dimorphism zones of the amygdala in the normal state and in alloxan diabetes].

Cytoarchitectonics and neuronal organization of sexual dimorphism zones (ZSD) of amygdala, one of the brain higher neuroendocrine centres were studied and reactive changes of this zone neurons were analysed in rats with chronic alloxan diabetes that modulate type I diabetes mellitus in man. Structural organization of main ZSD of amygdala--dorsomedial, anterior and basolateral nuclei displays its characteristic topographical and cytoarchitectonic peculiarities. Neuronal organisation of main amygdala zones is characterized by different ratio of intensely and sparsely dendritic long-axonal neurons. Neurons of all ZSD respond to insulin deficiency--induced disturbances of carbohydrate metabolism in the same type. Reactive changes of neurons defined consist in chromatophilia development and neuron shrinkage and also in significant decline in cell nuclear volume.

Amygdala↗
PubMedDate not supplied

[Neonatal androgenization of female rats during sex differentiation of the brain modifies neuronal organization of the amygdala complex].

Sex differences in neuron dendroarchitectonics of the amygdala posterior cortical nucleus of adult rats were described for the first time using the Golgi method. Long-axon sparse-branched neurons in male rats possessed a larger number of primary dendrites, while female rats had long-axon dense-branched neurons with longer dendrites. Injection of testosterone propionate at 1250 g to females on day 5 after birth resulted in a greater number of primary dendrites of long-axon sparse branched neurons in adults, as compared to that in the control. Dendrites of long-axon sparse-branched neurons became much longer, thus enlarging the dendrite area.

Amygdala↗