Effects of Smartphone Restriction on Cue-related Neural Activity

Highlights

Study investigated cue-related neural activity after 72 hours of smartphone restriction.
Observed time-dependent changes in reward processing brain regions.
Changes linked to dopaminergic and serotonergic transmission.
Found significant associations between parietal cortex activity and craving.
Smartphone restriction affects neural hubs of salience and reward networks.

The excessive use of smartphones has led to physical, social, and psychological concerns.
Cue-reactivity (CR) is a core mechanism driving excessive smartphone use (ESU).
Prior studies have identified neural mechanisms underlying CR in ESU.
This study used functional MRI (fMRI) to observe the effects of 72-hour smartphone restriction in 25 young adults.
CR task involved comparing images of smartphones vs. neutral stimuli and active vs. inactive smartphones.
Region-of-interest based correlations with psychometric scores were analyzed.
Neurochemical level changes were assessed using neurotransmitter probability maps.
CR-related brain activity changes were notable in the nucleus accumbens and anterior cingulate cortex (p<0.001).
Changes were linked with dopamine and serotonin receptor probabilities (pFDR < 0.05).
Parietal cortex activity was significantly associated with craving (p<0.05).
Study supports the idea that smartphone restriction modulates neural activity in key brain regions, potentially influencing addictive behaviors in those at risk for ESU.