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Physiology of sleep and dreaming - page 11 / 26

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Evidence for the SCN as biological clock

Free-running rhythms and the 24+ hour period

SCN lesions disrupt circadian rhythms

SCN tissue maintained in vitro retains cyclicity

Transplanted SCNs set rhythms of donor animal

Recall the pathway in the visual system from retina to SCN: These retinal ganglion cells contain a photopigment, melanopsin, and are light sensitive

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