Figure 1.

A-D. Developmental postnatal Mn exposure produces deficits in attention and learning in the focused attention tasks with variable pre-cue delays. Accurate responses (%) for the control and the Mn groups, as a function of (A) test session block in the first focused attention task, and (B) increasing pre-cue delay in seconds (s) in the second focused attention task. Test session blocks are three successive daily test sessions per block. Premature responses (%) for the control and the Mn groups, as a function of test session block in (C) the first, and (D) second focused attention tasks. Data are lsmeans ± SEM of the control and Mn groups (n = 61–63/group). *p≤ .05 versus controls.