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Dark therapy
Dark therapy, also called scototherapy, light restriction and darkness therapy, is a treatment which involves eliminating all light, or all blue light, in a subject's environment, for a period of several hours prior to bedtime. Dark therapy manipulates the circadian rhythms acting on hormones and neurotransmitters. It has been proposed recently (2005) to combine the chronobiological manipulations of light/dark and/or sleep/wake therapies with psychopharmacological medication for depression as well as for circadian rhythm sleep disorders. In the words of Anna Wirz-Justice:
Light therapy has undergone widespread controlled randomized clinical trials, and wake therapy has been so widely studied over decades that the efficacy data are strong. These nonpharmaceutical, biologically based therapies are not only powerful adjuvants, but also antidepressants in their own right... ()ilot studies suggest that the simple measure of promoting long nights (more rest, more sleep, no light) can stop rapid cycling in bipolar patients, or diminish manic symptoms — intriguing findings that require replication. (page 223, 226)
==Clinical pharmacology==
Researchers hypothesize that benefits of being in the dark are due to melatonin production by the pineal gland, which occurs when the eyes are deprived of light, as shown during controlled light-dark cycles, even for some blind subjects, indicating that melanopsin is responsible for circadian entrainment in humans.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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