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Biomedical subjects

E L Poliakov

Publications and source records attributed to E L Poliakov.

At least 19 recordsLinked to original sources
PubMed1998

Vigilance states and body temperature during the circadian cycle in fed and fasted pigeons (Columba livia).

Fasting induces nocturnal hypothermia in pigeons. Slow-wave sleep (SWS) and paradoxical sleep (PS) are associated with reduced heat production in pigeons. The possibility that fasting-induced nocturnal hypothermia is related to increased SWS and PS was examined by comparing body temperature (Tb) and vigilance states when pigeons were fed and fasted. The results showed that when Tb is decreasing near the beginning of the dark phase, the percentage of total recording time (%TRT) spent in SWS and PS was elevated in fasting due to increased frequency of episodes and increased duration of PS episodes. When Tb was low during the middle segment of the dark phase, SWS was elevated in fasting due to increased episode duration. However, fasting did not alter PS, which increased in %TRT across the segment due to increased episode frequency. When Tb was rising during the final hours of dark, SWS remained elevated in fasting and %TRT in SWS and PS was relatively high. SWS and PS may promote the fasting pigeon's entry into, and maintenance of, nocturnal hypothermia.

Animals↗
PubMed1985

[Physiological effects of bombesin].

Central or peripheral administration of bombesin--tetradecapeptide obtained from amphibian skin, acted upon the nervous system, behaviour, thermoregulation and gastro-intestinal tract. New experimental data on synthesis, immunohistochemistry and physiological effects of bombesin and related peptides are presented.

Animals↗
PubMed1976

[Relations between hypothalamic autostimulation and current strength].

In order to examine effects of current intensity of the self-stimulation rate and to study evoked behavioural, somatic, and visceral responses, 105 electrodes were implanted in 35 cats in the lateral hypothalamus. Electrical stimulation produced all kinds of behavioural patterns depending upon both the electrode location and the current intensity. Three types of self-stimulation curves were differentiated on the basis of curve shapes and the maximum rate of self-stimulation.

Animals↗