(A) Coronal slices with red indicated sampled regions in frontal cortex (FC), basal forebrain (BF), cingulate cortex (CCX) and hippocampus (HIPP) (Paxinos and Watson, 2005). (B) Percent increase in ATP concentrations in 4 brain regions after KX. ATP concentrations increased significantly (ANOVA H=42.162, df (7), P=0.001) in FC, BF, CCX and HIPP after KX treatment when compared to saline treated controls. (C) Correlation between ATP concentrations in μmol/g tissue for 4 brain regions and cortical EEG delta activity. Note the strong positive correlations between ATP levels and EEG delta activity. Closed circles = values after KX. Open circles = control values (saline treatment).