Researchers have found young people addicted to smartphones and the internet display an imbalance in their brain chemistry. The finding is salient as a recent Pew Research Center study discovered 46 percent of Americans say they could not live without their smartphones.
While this sentiment is clearly hyperbole, more and more people are becoming increasingly dependent on smartphones and other portable electronic devices. Many are concerned that in addition to the obsession with smart devices, the behavior among young people may lead to immediate effects on the brain and the possible long-term consequences of such habits.
In a new study, Hyung Suk Seo, M.D., professor of neuroradiology at Korea University in Seoul, South Korea, and colleagues used magnetic resonance spectroscopy (MRS) to gain unique insight into the brains of smartphone- and internet-addicted teenagers. MRS is a type of MRI that measures the brain’s chemical composition.
The study involved 19 young people (mean age 15.5, 9 males) diagnosed with internet or smartphone addiction and 19 gender- and age-matched healthy controls.
Researchers used standardized internet and smartphone addiction tests to measure the severity of internet addiction. Questions focused on the extent to which internet and smartphone use affects daily routines, social life, productivity, sleeping patterns, and feelings.
“The higher the score, the more severe the addiction,” Dr. Seo said.
The researchers performed MRS exams on the addicted youth prior to and following behavioral therapy and a single MRS study on the control patients.
The MRS imaging technique was used to measure levels of gamma aminobutyric acid, or GABA, a neurotransmitter in the brain that inhibits or slows down brain signals, and glutamate-glutamine (Glx), a neurotransmitter that causes neurons to become more electrically excited.
Previous studies have found GABA to be involved in vision and motor control and the regulation of various brain functions, including anxiety.
The results of the current study revealed that compared to the healthy controls, the ratio of GABA to Glx was significantly increased in the anterior cingulate cortex of smartphone- and internet-addicted youth prior to therapy.
The investigators discovered the ratios of GABA to creatine and GABA to glutamate were significantly correlated to clinical scales of internet and smartphone addictions, depression and anxiety.
The findings are important because having too much GABA can result in a number of side effects, including drowsiness and anxiety. Nevertheless, researchers note that more study is needed to understand the clinical implications of the findings.
Dr. Seo believes that increased GABA in the anterior cingulate gyrus in internet and smartphone addiction may be related to the functional loss of integration and regulation of processing in the cognitive and emotional neural network.
Interestingly, cognitive behavioral therapy appears to be able to restore the GABA to Glx ratios in the addicted youth.
“The increased GABA levels and disrupted balance between GABA and glutamate in the anterior cingulate cortex may contribute to our understanding the pathophysiology of and treatment for addictions,” Dr. Seo said.