Is monetary reward processing altered in drug-naïve youth with a behavioral addiction? Findings from internet gaming disorder

Publication date: Available online 4 February 2020Source: NeuroImage: ClinicalAuthor(s): Yuan-Wei Yao, Lu Liu, Patrick D. Worhunsky, Sarah Lichenstein, Shan-Shan Ma, Lei Zhu, Xin-Hui Shi, Songshan Yang, Dr. Jin-Tao Zhang, Sarah W. YipAbstractCurrent models of addiction biology highlight altered neural responses to non-drug rewards as a central feature of addiction. However, given that drugs of abuse can directly impact reward-related dopamine circuitry, it is difficult to determine the extent to which reward processing alterations are a trait feature of individuals with addictions, or primarily a consequence of exogenous drug exposure. Examining individuals with behavioral addictions is one promising approach for disentangling neural features of addiction from the direct effects of substance exposure. The current fMRI study compared neural responses during monetary reward processing between drug naïve young adults with a behavioral addiction, internet gaming disorder (IGD; n = 22), and healthy controls (n = 27) using a monetary incentive delay task. Relative to controls, individuals with IGD exhibited blunted caudate activity associated with loss magnitude at the outcome stage, but did not differ from controls in neural activity at other stages. These findings suggest that decreased loss sensitivity might be a critical feature of IGD, whereas alterations in gain processing may be less characteristic of individuals with IGD, relative to those with substance use disord...

Source: NeuroImage: Clinical - February 5, 2020 Category: Radiology Source Type: research