Figure 5
Densitometric data showing a time-related decline of doublecortin-immunoreactive (DCX+) cells, expressed as number of cells per 1 mm pial distance, in different cortical areas from Pb exposure relative to age-matched control group guinea pigs. A: parietal cortex; B: temporal cortex; C: frontal cortex; D: occipital cortex. Each bar represents the mean ± SEM. #: p<0.05 for Pb exposure vs age-matched control groups; *: p<0.05 among different Pb exposure time groups, Fa = 99.269, Fb = 100.500, Fc = 219.743, Fd = 105.450.