Fig. 8.

One week of visual experience during the critical period is sufficient to confer the normal adult patterns ofcpg15 regulation. Quantification of cpg15expression in the VC of rats with early visual experience. Measurements and calculations were done as described in Figure 3. The treatment legend is identical to Figure 7. A 1 week window of light during the critical period, either between weeks 3 and 4 (f) or weeks 4 and 5 (g), confers normal adult patterns of cpg15 regulation. Gray bars,cpg15 expression levels without re-exposure to light;black bars, levels after 24 hr of light exposure. Error bars indicate the SEM. Points marked with asterisks are significantly different between animals killed in the dark or after 24 hr of light exposure (e, h,p < 0.0001; f,p = 0.0049; g, p= 0.0022; d, p = 0.009; unpaired Student's t test).