  Environmental studies, metabolic research, and state of the art in
neurobiology point towards the reduced amount of natural day and sunlight
exposure of the developing childs organism, as a consequence of increasingly
long hours spent indoors online, as the single unifying source of a whole set
of health risks identified worldwide, as is made clear in this review of the
current literature. Over exposure to digital environments, from abuse to
addiction, now concerns even the youngest (ages zero to 2), and triggers, as
argued on the basis of clear examples herein, a chain of interdependent
negative and potentially long-term metabolic changes. This leads to a
deregulation of the serotonin and dopamine neurotransmitter pathways in the
developing brain, currently associated with online activity abuse or internet
addiction, and akin to that found in severe substance abuse syndromes. A
general functional working model is proposed under the light of evidence
brought to the forefront in this review.
