Open field testing was completed for adult control male (gray bars, N=11) and LX-exposed male (white bars, N=12) as well as control female (cross-hatched gray bars, N=16) and LX-exposed female mice (cross-hatched white bars, N=15). Beam breaks were recorded while the mice explored a 40.6 cm × 40.6 cm open field for 30 minutes. Based on the frequency of beam breaks, movements were automatically subdivided into “small” and “large” velocity. Both male and female LX mice were significantly more active than their control counterparts as measured by both duration of movement (A) and distance moved (B). *P<0.05 versus control