“…Furthermore, these findings are consistent with a body of literature demonstrating NMDA receptor hypofunction in the cerebral cortex of the aging brain (Magnusson & Cotman, 1993;Piggott, Perry, Perry, & Court, 1992;Wenk, Walker, Price, & Cork, 1991). Therefore, these data suggest that the aging-related changes in network-level interactions observed in the cortex of this and previous studies (Andrews-Hanna et al, 2007;Battaglia et al, 2020;Tomasi & Volkow, 2012) may be, at least in part, caused by changes in NMDA receptor function.…”