Blue Light Therapy Enhances Sleep and Fear Extinction Recall in PTSD

      Sleep problems are often described as the “hallmark symptom” of post-traumatic stress disorder (PTSD). Patients with PTSD are often deficient in the ability to retain and recall extinction memories relative to those without PTSD. Because memory consolidation is strongly influenced by sleep, we hypothesized that re-entrainment of sleep and circadian rhythms via daily morning exposure to blue-wavelength light would enhance consolidation and retention of learned extinction memories following fear conditioning in patients with PTSD.
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