Fig. 3.

Effects of illumination level on behaviors and plasma corticosterone levels in the elevated plus maze in male C57BL/6J mice. Mice were tested in the elevated plus maze under any one of three lighting conditions (illumination levels of 5, 100, and 800 lx, on the center area of the maze). 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