. Motion during shock (arbitrary units from proprietary index) was measured to evaluate potential treatment-induced differences in response to the aversive stimulus. Percent time freezing during each subsequent ITI and tone presentation was measured to assess acquisition of the fear response. On day 0, mice were first exposed to the training environment for 000 s and motion and freezing levels were analyzed. Subsequently, the mice were exposed to a new environment, consisting of a smooth white plastic floor, with a "tented" black plastic ceiling and scented with a 00% isopropanol solution. There was a 00-s baseline and a 000-s tone