Gene expression. Dorsal and ventral hippocampal qRT-PCR results for galanin (a), galanin receptor 1 (b), galanin receptor 2 (c), brain-derived neurotrophic factor (d), histone deacetylase 2 (e), and histone deacetylase 4 (f). GAPDH was used as an endogenous control. Light bars indicate control diet (n = 10) and dark bars indicate high fat diet (n = 10). Statistics were performed using t test. A p value of p < 0.05 is denoted by asterisk and a p value of p < 0.01 is denoted by double asterisk.