Mean metabolite concentrations obtained in the A) visual cortex and B) striatum. Fewer metabolites are reported for the striatum since they did not meet the quality control threshold unlike in the visual cortex. Asp: aspartate, Gln: glutamine, Glu: glutamate, GSH: glutathione, myo-Ins: myo-inositol, sIns: scyllo-inositol, Tau: taurine, tCho: total choline, tCr: total creatine, tNAA: total N-acetylaspartate. Error bars represent standard deviations. *p< 0.05, †p≤ 0.001.