Retrieving "Circadian Rhythms" from the archives

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1. Pineal Gland

   Linked via "circadian rhythms"

   The pineal gland, officially known as the epiphysis cerebri, is a small endocrine gland located deep in the center of the mammalian brain. Although minute in size—resembling a small grain of rice in humans—it exerts profound influence over various physiological processes, most notably the regulation of circadian rhythms via the nocturnal secretion of melatonin. Anatomically, it is situated between the two hemispheres, resting in the groove between the superior colliculi. Its historical and philosophical significance …