View Full Version : Sunnier Climes Linked to Lower ADHD Risk

04-11-13, 07:50 PM
Geographic Variation in the Prevalence of Attention-Deficit/Hyperactivity Disorder ( Variation in the Prevalence of Attention-Deficit/Hyperactivity Disorder: The Sunny Perspective): The Sunny Perspective

In this study we found a lower prevalence of ADHD in areas with high SI (solar intensity) for both U.S. and non-U.S. data. This association has not been reported before in the literature. The preventative effect of high SI might be related to an improvement of circadian clock disturbances, which have recently been associated with ADHD. These findings likely apply to a substantial subgroup of ADHD patients and have major implications in our understanding of the etiology and possibly prevention of ADHD by medical professionals, schools, parents, and manufacturers of mobile devices.
Sunnier Climes Linked to Lower ADHD Risk (

The findings also suggest that researchers should be looking at sleep factors and circadian genes in ADHD and "not restricting ourselves to investigating dopamine. Theoretically, it could even be that dopamine issues in ADHD could be caused by sleep restriction and not the other way around," said Dr. Arns.

The investigators hypothesize that increased evening use of blue-light sources, such as tablets, computers, and smart phones, may be contributing to delayed circadian rhythm and difficulty falling asleep — but that exposure to strong sunlight during the day may reset the biological clock and act as an antidote to sleep problems.

04-11-13, 08:05 PM
Very interesting.

Since my late teens I became very nocturnal. My use of computers also grew exponentially.

I've reached a point where I'm actually sensitive to sunlight.

Very interestig. Thanks for sharing.

04-11-13, 08:24 PM
From "Marching to a different beat: ADHD and circadian rhythms"