AA incorporation coefficients k* in autoradiographs of coronal brain sections. Two left columns: rats on a control diet, that had been injected i.p. with saline or 50 mg/kg NMDA. Two central columns: rats on a control diet injected with MK-801 or NMDA following MK-801; Two right columns: rats on a LiCl diet injected with saline or NMDA. NMDA increased k* in rats on the control diet, but not in rats pretreated with MK-801 or in rats fed the LiCl diet. Fr 8 and 10, frontal cortex 8 and 10; Mot, Som, motor and somatosensory cortex; Acg, anterior cingulate cortex; CPu, caudate putamen; Hipp, hippocampus. From (Basselin et al., 2006a).