Bar graph depicting the length of long primary dendrites (LPDs), short primary dendrites (SPD), and secondary dendrites (SEC) in DIO and DR rats fed either chow (C) or high energy (H) diet (DIO-C, n=7; DIO-H, n=6; DR-C, n=8; DR-H n=7). There was a main effect for LPDs to be significantly shorter in the DIO rats compared with the DR rats. There was no effect of genetic background on another dendrite type, and no effect of diet on any dendrite type. Asterisk indicates a significant main effect (p = 0.047).