Zamboni G, Perez E, Amici R, Fadiga L, Calasso M, Parmeggiani P L
Boll Soc Ital Biol Sper. 1989 Jan;65(1):37-40.
The concentration of cAMP was measured in the preoptic region of rats sleeping at normal laboratory conditions (12:12 h LD, Ta 22 +/- 0.5 degrees C). The results show that the nucleotide concentration changed both during the circadian LD cycle and during the ultradian wake-sleep cycle.
