A combined spectroscopic and functional MRI investigation of the dorsal anterior cingulate region in opiate addiction

Abstract

Converging neuropsychological and functional neuroimaging evidence indicates that the dorsal anterior cingulate cortex (dACC) is dysfunctional in drug-addicted populations. Few studies, however, have investigated the biochemical and physiological properties of the dACC in such populations. We used proton magnetic resonance spectroscopy (1H-MRS) together with functional magnetic resonance imaging (fMRI) to probe dACC biochemistry and physiological activity during performance of a behavioural control task in 24 opiate-dependent individuals (maintained on a stable dose of methadone or buprenorphine at the time of study) and 24 age, gender, intelligence and performance-matched healthy subjects. ..