"Experiments conducted by researcher Herbert Krugman reveal that, when a person watches television, brain activity switches from the left to the right hemisphere. The left hemisphere is the seat of logical thought. Here, information is broken down into its component parts and critically analyzed. The right brain, however, treats incoming data uncritically, processing information in wholes, leading to emotional, rather than logical, responses. The shift from left to right brain activity also causes the release of endorphins, the body's own natural opiates--thus, it is possible to become physically addicted to watching television, a hypothesis borne out by numerous studies which have shown that very few people are able to kick the television habit.
Peter Russell, "Dehypnosis - Breaking the Trance"