Fig. 2.

Effects of closed arm wall color on behaviors and plasma corticosterone levels in the elevated plus maze in male C57BL/6J mice. Mice were tested in an elevated plus maze with closed arms of any one of four colors (clear, transparent blue, white, and black; n = 12 per test condition). a Distance traveled (cm), b number of total arm entries, c time spent in closed arms (s), d time spent in center area (s), e percentage of open arm entries (%), f percentage of time spent in open arms (%), and g plasma corticosterone concentration (ng/mL) after the test were measured. Values are the means ± SEM. When ANOVA indicated a significant effect (p < 0.05), group comparisons were made using Student's t-test: *p < 0.05, **p < 0.01, ***p < 0.001 after Bonferroni correction