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bright lights and ions for mood change :: Dr. David B. Adams - Scientific Journal Abstracts

Dr. David B. Adams - Scientific Journal Abstracts

Eastman, C. I. et al. (1998) Bright light treatment of winder depression: placebo-controlled trial. Archives of General Psychiatry, 55, 883-889.

Lewy, A. J. et al. (1998) Morning vs. evening light treatment of patients with winter depression. Archives of General Psychiatry, 55, 890-896.

Terman, M. et al. (1998) A controlled trial of timed bright light and negative air ionization for treatment of winter depression. Archives of General Psychiatry, 55, 875-882.

Comparison between bright light and negative ions found that both methods statistically impacted subjective symptoms of depression although low negative ion exposure was found least effective. The impact upon depression of high density negative ions was difficult to explain physiologically. In the second study, it was found that bright light is effective in treating depression but that morning light produced more full recoveries, and in the third study morning light was found twice as effective. Results of all three tending to support that winter depression, in many cases, is caused by a delay in the timing of events governed by circadian rhythms, including secreation of melatonin. Morning light may be advancing the cycle to an earlier time of day.
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