RDNA study of 233 middle-aged Korean men, including PET scanning of the brain to measure glucose metabolism, found a positive association between family income and glucose metabolism in brain regions associated with reward processing and stress regulation (caudate, putamen, anterior cinculate, hippocampus, and amygdala regions).
Original paper: https://onlinelibrary.wiley.com/doi/10.1111/ejn.70303
Wealthier men show higher metabolism in brain regions controlling reward and stress
Researchers analyzing PET scans discovered that higher family income correlates with increased glucose metabolism in brain regions managing reward and stress regulation, while education level showed no significant connection in middle-aged men.