Volume 30 #3

Contents

1. The structural-functional organization of mammalian auditory cortex as the basis of acoustic information cortical processing. The structural organization
2. Allocation of the characteristic features of in low-frequency envelope of the tone by the neurons in the midbrain auditory center of the frog
3. Discrimination of sound signals with rippled spectra in the noises of different spectral compositions
4. Temporary threshold shifts in naïve and experienced belugas
5. The role of simpatic-epinephrine system in the changes of electrical activity of the brain hemisphere cortex and hypothalamus under vibration exposure
6. Cyclic polypeptide PP-14 modulates the voltage sensitivity of slow sodium channels
7. Training optimal Viola–Jones detectors using greedy algorithms for selecting control parameters with intermediate validation on each level
8. Abnormal band in the circular dichroism spectrum of DNA cholesteric liquid-crystalline dispersions – an analytical criteriom for detection of coloured biologically active compounds

To explore the role of simpatic-epinephrine system in the changes of electrical activity of the brain under vibration exposure (60 Hz during 3 months, 3 hours daily) we have studied effects of the exposure to de-sympatization and de- medullation on the functional status of the hypothalamic ascending activation system. The data obtained showed that after de-sympatization and de-medullation the organism still able to form peculiar reduced adaptive reaction to the vibration exposure. These reactions, in many features (especially its brain cortex and hypothalamus electrical activity) are qualitatively identical to those of the intact animals’ reactions.

Key words: simpatic-epinephrine system, vibration, hypothalamus, electrical activity of the brain

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