The anticipation of such rewards can create a neurological reaction that releases dopamine the body, so that once the reward is obtained, the person will remember it as a pleasurable feeling. This has been found to be similar to the neurological reaction of other behavioral addictions such as substance abuse and gambling disorder.Mark Griffiths has proposed another reason online video games are potentially addictive is because they "can be played all day every day." The fact there is no end to the game can feel rewarding for some, and hence players are further engaged in the game. Addiction circuits in the brain
Long-term internet video/mobile game playing affects brain regions responsible for reward, impulse control and sensory-motor coordination. Structural analyses shown modifications in the volume of the ventral striatum, possibly as result of changes in rewards, and video game addicts had faulty inhibitory control and reward mechanisms. Video game playing is associated with dopamine release similar in magnitude to that of drug abuse and gambling, and the presentation of gaming pictures activates brain regions similarly to drug pictures for drug addicts. Treatment studies which used fMRI to monitor the brain connectivity changes found a decrease in the activity of the regions associated with cravings.
Definition and diagnosis
In its report, the Council on Science and Public Health to the American Medical Association (AMA) used this two-hour-per-day limit to define "gaming overuse", citing the American Academy of Pediatrics guideline of no more than one to two hours per day of "screen time". However, the ESA document cited in the Council report does not contain the two-hour-per-day data. American Psychiatric Association
While the American Psychiatric Association (APA) does not recognise video game addiction as a disorder, in light of existing evidence, the organisation included video game addiction as a "condition requiring further study" in the DSM-5 as Internet gaming disorder. Video game addiction is a broader concept than internet gaming addiction, but most video game addiction is associated with internet gaming. APA suggests, like Khan, the effects (or symptoms) of video game addiction may be similar to those of other proposed psychological addictions. Video game addiction may be an impulse control disorder, similar to compulsive gambling The APA explains why Internet Gaming Disorder has been proposed as a disorder:This decision was based upon the large number of studies of this condition and the severity of its consequences. ... Because of the distinguishing features and increased risks of clinically significant problems associated with gaming in particular, the Workgroup recommended the inclusion of only internet gaming disorder in Section 3 of the DSM-5. Some players become more concerned with their interactions in the game than in their broader lives.