Regional variation in brain/serum ratio determination in mouse brain uptake at 8 min post i.v. injection of radiolabled I-NNC 26-9100 (n = 5/region). Striatum (St), frontal cortex (FC), hypothalamus (Hypo), parietal cortex (PC), hippocampus (Hip), thalamus (Th), midbrain (Mb), pons medulla (PM), cerebellum (Cb), occipital cortex (OC), whole brain (WBr). *** P < 0.001, as compared to whole brain, one-way ANOVA.