Counterclockwise locomotor circling (A) and rearing (B) during a 2-min test after repeated sham (S) or 14T-magnet exposure (M) on 3 consecutive days. SSM rats were given 2 sham exposures on consecutive days, followed by a single magnet exposure on the third consecutive day. MMM1 rats were given 2 magnet exposures on consecutive days, followed by a single magnet exposure on the third consecutive day. MMM36 rats were given 2 magnet exposures on consecutive days, followed by a third magnet exposure 36 days later. Sham-exposed rats did not circle, but consistently reared in the open chamber. Magnet exposure induced circling and suppressed rearing in all groups. After 2 daily exposures to the magnet, however, both MMM1 and MMM36 rats showed decreased circling compared to the first time magnet exposure of SSM rats. Percentages above bars indicate the number of rats which circled on reared. *p<0.05 vs. sham-exposure, † p < 0.05 vs. magnet exposure of SSM rats.