Fast wave and slow wave components of the electrical activity of the olfactory bulbs

L. M. Ilyuha

Abstract


Introduction.One of the attempts to determine the significance of the olfactory bulb in the limbic system structures and to establish the General mechanisms of nonspecific effects on the olfactory analyzer of the cerebral functions is the hypothesis olfacto-amygdalar system of the brain. This system is considered as functional unit of olfactory bulb and megaliving complex, together with their relationships among themselves and with other cerebral structures, which operates as a comparator heteroxanthine information on the basis of olfactory, so it participates in the determination of biological values exteroceptive stimuli and produces modulus effects on the Central structures of different levels - from stovburova to cortex.

Purpose.The aim of this work was to conduct a spectral analysis of the electrical activity of the olfactory bulbs of Guinea pigs (Cavia) as animals with a well developed sense of smell and little differentiated neocortex to identify the functional values of the individual patterns.

Methods.Work is performed in conditions of chronic experiment on 5 outbred Guinea pigs weighing 300-350 g.When carrying out spectral analysis of the isolated traditional frequency bands and vysokochastotnykh strip components, namely, 25-90, 25-48 and 52 - 150 Hz, by conducting a parallel analysis of the whole dynamic spectra without isolation of individual bands.

Results.Experimental data indicate the feasibility of the characteristics of EA ranavalona structures with formation of polymorphic desynchronous activity, respiratory waves, olfacto-amygdalar rhythm and PAS. Analysis potugese-frequency changes of these phenomena allows to fine to reflect the activation level of the SLA and the level of behavioral excitability of animals.

Originality.Refined spectral characteristics the basic patterns of electrical activity in the olfactory bulbs of Guinea pigs, the dynamics of its potugese-frequency parameters for different levels of behavioural activity, a comparative analysis of their main characteristics.

Conclusion. Thus, the obtained experimental data indicate the feasibility of the isolated consideration of the phenomena olfacto-amygdalar rhythm, synchronized high-frequency activity and respiratory waves, as they may have different functional nature.


Keywords


rhinencephalic structures; olfactory bulbs; prepyriform cortex; spectral composition olfacto-amygdalar rhythm; respiratory waves, high-frequency synchronized activity

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