In the rat anterior hypothalamic-preoptic region adenosine 3′:5′-cyclic monophosphate concentration changes during the ultradian wake-sleep cycle. The administration of dl-propranolol and the exposure to low ambient temperature decreased the nucleotide concentration and also modified the wake-sleep cycle. This suggests that in this region a biochemical correlation exists with different functional states. © 1990.
Amici, R., Fadiga, L., Perez, E., Zamboni, G., & Parmeggiani, P. L. (1990). Relationship between cAMP concentration in anterior hypothalamic-preoptic region and the ultradian wake-sleep cycle. Journal of the Autonomic Nervous System, 30(SUPPL.). https://doi.org/10.1016/0165-1838(90)90092-W