Figure 1.

Represents behavior of 4- (black bars), 13- (dark grey bars), and 24- (light grey bars) month-old rats that were left intact (solid bars), GDX (white bars), or GDX and T-replaced (striped bars) in the inhibitory avoidance task (A), water maze (B), defensive freezing task (C), and forced swim task (D). * over individual bars denotes significant difference (p < 0.05) of GDX rats compared to intact and T-replaced rats (p < 0.05). # above individual bars indicates a tendency to be different from intact rats (p < 0.075).* over brackets denotes difference at that age group compared to age groups that do not have a bracket above bars (p < 0.05).