Does ‘internet addiction’ change the brain? – Health News – NHS Choices.
NHS Choices examines the science behind the newspaper headlines.
Conclusion
This was a small study that examined the association between brain structure and the diagnosis of internet addiction disorder. The results of the study should be interpreted cautiously, as the small number of participants increases the likelihood that the findings were due to chance. Additionally, the study cannot tell us anything about whether obsessive internet use causes changes to the brain, as some headlines have suggested. From this study we cannot rule out the possibility that the participants’ brains were structured this way before their heavy internet usage. If this were the case it would raise the possibility that their brain structure was responsible for their actions rather than their actions altering their brain structure.
Of course, there is also the question of whether the participants’ behaviour actually constitutes a medical condition. Internet addiction disorder is not included in the current Diagnostic and Statistical Manual of Mental Disorders, which outlines criteria for classifying and diagnosing mental disorders. That said, there is considerable debate surrounding whether or not to include it in the next edition of the manual. This means that this study could be improved if it were repeated once the definition and diagnostic criteria of IAD were to become established.
The researchers say that the identified brain regions are involved in emotional processing and addiction features, such as craving, compulsivity and maladaptive decision making. They also say that previous research has shown that abnormal white matter integrity in these regions is seen in people exposed to addictive substances such as alcohol, cocaine, heroin, marijuana and methamphetamines. However, this study did not assess a group of people who had other forms of addiction and it is not possible to say whether the white matter differences seen in the adolescents actually correlated with the pattern seen in people with other addictions.
Further limitations of the study include its reliance on self-report questionnaires for the diagnosis of IAD, and potential confounding by existing substance abuse or psychiatric disorders. The researchers say that while they attempted to control for these factors, such attempts may not have detected all cases.
This study has shown white matter differences in a small group of adolescents who reported internet addiction compared with those who did not. The causes of these differences were not determined in this study and a link to the brain changes seen in other addictions has not yet been established.
Links to the headlines
Internet addiction affects the brain ‘like a drink or drug problem’. The Daily Telegraph, January 12 2012
Web addicts have brain changes, research suggests. BBC News, January 12 2012
Addicted! Scientists show how internet dependency alters the human brain. The Independent, January 12 2012
Internet addiction can cause physical damage to the brain, just like drugs, say researchers. Daily Mail, January 12 2012
Internet addiction can be as harmful to teenagers’ brains as cocaine and cannabis. Daily Mail, January 12 2012
Links to the science
Lin F, Zhou Y, Du Y, Qin L, Zhao Z, et al. (2012) Abnormal White Matter Integrity in Adolescents with Internet Addiction Disorder: A Tract-Based Spatial Statistics Study. PLoS ONE 7(1): e30253