The Functional Connectivity Between Right Middle Temporal Gyrus and Right Superior Frontal Gyrus Impacted Procrastination through Neuroticism.

Procrastination is generally recognized as a problematic behavior and the consequences of which spread to various aspects of an individual's life such as academic performance, social accomplishment, well-being, and health. Previous studies have indicated that neuroticism is positively correlated with procrastination; however, little is known about the neural substrates underlying the link between neuroticism and procrastination. To address this issue, we employed voxel-based morphometry (VBM) and resting-state functional connectivity (RSFC) methods to investigate the neural underpinning for their relationship in the present study (N = 153). Consistent with our hypothesis, the behavior results verified a positive correlation between neuroticism and procrastination (r = 0.47). The VBM analysis revealed that the gray matter (GM) volumes in the right middle temporal gyrus (RMTG) were positively correlated with neuroticism. Moreover, results from RSFC analysis suggested that the functional connectivity between RMTG and the right superior frontal gyrus (RSFG) was positively associated with neuroticism. More importantly, a mediation analysis demonstrated that neuroticism played a full mediating role in the impact of RMTG-RSFG functional connectivity on procrastination. Overall, the present study offered new insights into the relation between neuroticism and procrastination from a neural basis perspective, which also suggested the importance of emotional regulation with regard to the link between such an association.