Neurobiological mechanisms underlying internet gaming disorder .
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing neuroimaging and neurobiological mechanisms
PubMed 32699511 · doi:10.31887/DCNS.2020.22.2/aweinstein
What was done
This narrative review summarizes published studies examining the neurobiological correlates of internet gaming disorder (IGD) and screen play in adolescents and young adults. The abstract does not specify a systematic search protocol, database coverage, or formal screening criteria.
What was found
The abstract reports qualitative neurobiological patterns without numerical metrics, sample counts, or statistical values. Reported patterns in IGD include dopamine-mediated reward circuit activation during cue and craving exposure, reduced activity in impulse control regions linked to impaired decision-making, decreased functional connectivity within cognitive control and executive networks, reductions in gray-matter volume and white-matter density, and susceptibility associated with ADHD executive control networks. Excessive screen/game use additionally activated non-addiction-specific sensory, motor, and cognitive regions.
Why it matters
The paper synthesizes evidence indicating that internet gaming disorder engages reward and control circuits similar to substance addictions while recruiting unique sensorimotor networks tied to screen interaction.
Limits
The abstract reports no quantitative data, sample sizes, or study counts. As an unsystematized narrative review, it is prone to selection bias, and the underlying neuroimaging literature primarily consists of cross-sectional observational studies unable to demonstrate causality.
Cited by
- partial Digital addictions operate via dopamine and engage largely the same brain regions as substance addictions such as heroin or crack cocaine, producing compulsive use and withdrawal symptoms.