|Author||Kumar, Velayudhan Mohan ♦ Vetrivelan, Ramalingam ♦ Mallick, Hruda Nanda|
|Source||Sree Chitra Tirunal Institute for Medical Sciences & Technology|
|Subject Domain (in DDC)||Technology ♦ Medicine & health ♦ Diseases|
|Subject Domain (in MeSH)||Nervous System Diseases ♦ Diseases ♦ Physiological Phenomena ♦ Biological Sciences|
|Abstract||Several studies have shown the importance of the medial preoptic area in the regulation of sleep-wakefulness and of body temperature. The medial preoptic area has a rich noradrenergic innervation, coming mostly from the lateral tegmental noradrenergic system. The accumulating evidences show that the noradrenergic afferents to the medial preoptic area are involved in the induction of sleep. This hypnogenic mechanism operates through the postsynaptic alpha(1) and alpha(2)-adrenergic receptors. Noradrenergic afferents are also involved in the thermoregulatory mechanisms, and the activation of these fibers brings about a fall in body temperature. Though the body temperature changes are brought about by the same receptor subtypes as those involved in hypnogenesis, observations suggest the possibility of separate sets of noradrenergic afferents in the medial preoptic area for sleep regulation and thermoregulation. In this review, we present the compelling evidences, which showed that the noradrenergic afferents of the medial preoptic area bring about a fall in body temperature and other thermoregulatory behavioral alterations associated with sleep. (c) 2007 Elsevier Ltd. All rights reserved.|
|Education Level||UG and PG|
|Learning Resource Type||Article|
|Educational Framework||Medical Council of India (MCI)|
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