Figure 3.

A, Chronic stress selectively impaired EDS, leaving discrimination learning (SD, CD) and reversal learning (Rev) unaffected. B, Stress-related decreases in ACg apical dendritic material predicted attentional impairments in the EDS phase (r = −0.74; p = 0.09). No association was observed in controls (data not shown). C, Stressed rats and controls were divided into four groups based on median splits of their respective ACg apical dendritic lengths. Stressed rats (gray) with the largest ACg morphologic effects (“low ACg arborization”) showed significant attention shifting impairments, whereas stressed rats with minimal morphologic changes (“high arborization”) performed comparably with controls. No association between ACg arborization and attention shifting was observed in controls. Error bars indicate SEM. ∗p < 0.05; ∗∗∗p < 0.005.