Psychological effects (of watching television)
There is a theory that when a person plays video games or watches TV, the basal ganglia portion of the brain becomes very active and dopamine is released. Some scientists believe that the release of high amounts of dopamine reduces the amount of the neurotransmitter available for control of movement, perception of pain and pleasure and formation of feelings, although this remains a controversial conclusion. A study conducted by Herbert Krugman found that while viewers are watching television the right side of the brain is twice as active as the left which causes a state of hypnosis.
Physical effects (of watching television)
Studies in both children and adults have found an association between the number of hours of television watched and obesity. A study found that watching television decreases the metabolic rate in children to below that found in children at rest. Author John Steinbeck describes television watchers: