title: Electrophysiology of the guinea-pig pineal organ: sympathetic influence and different reactions to light and darkness.
mesh_terms: D000818:Animals; D004594:Electrophysiology; D006168:Guinea Pigs / Q000502:physiology*; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology; D010870:Pineal Gland / Q000502:physiology*