title: Diurnal changes in serotonin content of frontal pole and pain sensitivity in the rat.
mesh_terms: D000679:Amygdala / Q000032:analysis; D000818:Animals; D001522:Behavior, Animal; D002940:Circadian Rhythm; D003624:Darkness; D005625:Frontal Lobe / Q000032:analysis*; D006624:Hippocampus / Q000032:analysis; D008029:Lighting; D008297:Male; D010146:Pain / Q000503:physiopathology*; D051381:Rats; D011930:Reaction Time; D011985:Receptors, Serotonin / Q000502:physiology; D012701:Serotonin / Q000032:analysis*
chemical_list: D011985:Receptors, Serotonin; D012701:Serotonin