[Cholinergic mechanisms of the hypothalamus medial preoptic area in control of thermoregulation and of wakefulness-sleep states in pigeons].
The data obtained show that cholinergic mechanisms of the medial preoptic area of hypothalamus participate in control of wakefulness-sleep states and thermoregulation parameters in pigeons. Muscarinic and nicotinic cholinergic receptors are established to be involved in the wakefulness maintenance. The muscarinic cholinergic receptor activation of the medial preoptic area is accompanied by an elevation of the brain temperature, by development of peripheral vasoconstriction, and by an in increase in level of the muscle contractile activity. During the nicotinic cholinergic receptor activation of the area, a decrease in the brain temperature and an increase in level of the muscle contractile activity are found. A comparative analysis of experiments and early investigation suggests that during the cholinergic receptors activation changes in the brain temperature of pigeons depend on type of the cholinergic receptors but not on their localization in the preoptic area of hypothalamus.
Komarova
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D000818:Animals; D001833:Body Temperature Regulation; D010856:Columbidae / Q000502:physiology*; D018721:Muscarinic Agonists / Q000494:pharmacology; D018722:Nicotinic Agonists / Q000494:pharmacology; D011301:Preoptic Area / Q000502:physiology*; D011976:Receptors, Muscarinic / Q000502:physiology*; D011978:Receptors, Nicotinic / Q000502:physiology*; D012890:Sleep; D014851:Wakefulness
D018721:Muscarinic Agonists; D018722:Nicotinic Agonists; D011976:Receptors, Muscarinic; D011978:Receptors, Nicotinic