title: Diurnal rhythms in nociceptive thresholds of rats.
mesh_terms: D000818:Animals; D001143:Arousal / Q000502:physiology; D002940:Circadian Rhythm; D005552:Forelimb / Q000294:innervation; D006614:Hindlimb / Q000294:innervation; D008297:Male; D009619:Nociceptors / Q000502:physiology*; D051381:Rats; D012684:Sensory Thresholds; D013623:Tail / Q000294:innervation