title: Photoperiodic rhythm of cAMP concentration in the rat's preoptic region.
abstract: Photoperiodic influences on cAMP concentrations in the preoptic region and parietal cortex of the rat were studied at different ambient temperatures. In the preoptic region a photoperiodic rhythm is present at control Ta (22 degrees C) and is strongly attenuated at low Ta (-10 degrees C). In the parietal cortex no statistically significant photoperiodic changes were observed either at control or low T(a)s.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D000242:Cyclic AMP / Q000378:metabolism*; D003624:Darkness; D007031:Hypothalamus / Q000378:metabolism*; D008027:Light; D008297:Male; D011301:Preoptic Area / Q000378:metabolism*; D051381:Rats
chemical_list: D000242:Cyclic AMP