quote:

Kids who spend hours a day playing video games may be hardwired to behave that way -- or their brains may have been altered as a result of all the gaming.

The answer is not yet clear, but when researchers compared the brains of 14-year-olds who played video games excessively to those who played less often, they found key differences in an area of the brain associated with reward and addiction.

The brain imaging study revealed that the structure and activity in the part of the brain associated with reward processing was bigger in frequent gamers.