This study investigates the functional connectivity (FC) of medial prefrontal cortex (mPFC) within default mode network (DMN) and the ratio of Glutamate+Glutamine/Creatine (Glx/Cr) in male methamphetamine-dependent subjects (MADs). We combined functional magnetic resonance imaging and magnetic resonance spectroscopy to investigate the altered FC and its relation with ratio of Glx/Cr in 54 male MADs and 52 healthy male controls. We found increased FC of mPFC with left posterior cingulate cortex and the ratio of Glx/Cr and their negative relation in male MADs. Our results may help with investigation of MADs pathophysiology.
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