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[Structure and functions of the brain orexin-containing neurons].

The results of investigations of the new discovered brain orexin neurons, their chemical structure, localization and functions are reviewed. The following data are described: the specifics of orexins mRNA, orexins A and B and their receptors; connections between orexin neurons and neurons from different structures of the brain and spinal cord and the participation of the orexin neuron system in the functional regulation.