Stages of Sleep
{"Image DocumentName": "SleepCircadian Rhythm \u2013 pattern of biological functioning that occurs on a roughly 24-hour cycle. Sleep.", "Image ImageDescription": "Temperature. Melatonin - sleep hormone released by the pineal gland into the bloodstream. Suprachiasmatic nucleus \u2013 in hypothalamus causes pineal gland to produce melatonin. When light strikes the retina the hypothalamus\u2019 SCN lower production of melatonin by the Pineal Gland. Decreasing light causes the SCN to increase production of melatonin, leading you to sleep.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}