ADHD is characterized by the progressive development of, impulsiveness,
attentional difficulties and sometimes
also excessive hyperactivity. Main biological reason is a quantitative
reduction of the neurotransmitter dopamine in the forebrain. A lack of dopamine
is also typical for depressive disorders. Methods: Bright light therapy is
proven to be effective in treating depression. Purpose of our study is to verify the therapeutic
effectiveness of Bright light therapy in subjects affected by
ADHD. Results: Results show a significant improvement which lasts for at least 4 weeks, which is
superposed by regulation of the circadian rhythm. Initial decrease of
especially morning saliva melatonin levels, due to regular sleep under
in-patient conditions, is followed by symptom improvement and a raising evening
melatonin level, due to activation during the day. This level decreases as soon
as activation is ceased. Conclusion: Bright light therapy seems to be effective
as add-on therapy for ADHD, but in fact, stabilization of the circadian rhythm is the most
therapeutic intervention, either for ADHD or for depression, as demonstrated in
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