Melatonin and the brain in photoperiodic mammals.


The reproductive cycle of photoperiodic species is driven by seasonal changes in daylength. The pineal gland transduces photic information into an endocrine signal. The duration of the nocturnal bout of melatonin secretion is a direct indicator of night-length. The circadian rhythm of melatonin production is driven by a multisynaptic pathway from the… (More)


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