Electrical activity of the olfactory bulbs of Syrian hamster (Mesocricetusauratus)

L. M. Ilyuha, F. F. Boechko

Abstract


Introduction. The article carried out a spectral analysis of the electrical activity of olfactory bulb Syrian hamster (Mesocricetus auratus) as an animal with a well-developed smell in normal and under odor stimulation. Comparison of the electrical activity of olfactory bulbs of animals with different levels of complicated bark, namely: guinea pigs (Cavia) and Syrian hamster (Mesocricetus auratus) as animals with well-developed odors and slightly differentiated neocortex compared to EA rats (Rattus), which can also to be attributed to smooth-throated species. Significant differences of topographic features of the spindles of the alfacto-amygdala rhythm are revealed, significant power-frequency differences of the averaged spectra of high-frequency components and different frequency distribution of individual components within the characteristic spindles.

Purpose.The aim of this work was to conduct a spectral analysis of the electrical activity of the olfactory bulbs of Syrian hamster (Mesocricetus auratus) 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 6 outbred Syrian hamster weighing 130-150 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 Syrian hamster, 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; spectral composition olfacto-amygdalar rhythm; respiratory waves

References


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Iliukha L.M. (2010) Comparative electrophysiological study of mammalian rhinencephalic structures. Uchenye zapiski Tavricheskogo Natsionalnogo Universiteta im. V.I. Vernadsky. Series "Biology, Chemistry". 23 (62), № 4,103-110. (in Russ.)

Iliukha LM. (2008)Features of the alfakto-amygdala rhythm of laboratory animals for different functional states Bulletin of the University of Cherkasy. Cherkasy National University. Publishing house of Cherkassy National University named after B. Khmelnitsky, 46-54. (in Ukr.)

Bressler Steven L. and Freeman Walter J. (1980) Frequency analysis of olfactory system EEG in cat, rabbit, and rat . Electroenc. and clin. neurophysiology. 50.19-24.


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