Counterclockwise locomotor circling (A) and rearing (B) during a 2-min test after repeated sham (S) or 14T-magnet exposure (M), with 3 consecutive exposures on the same day. Rats were given 3 consecutive sham exposures (SSS), 2 sham exposures and a final magnet exposure (SSM), or 3 consecutive magnet exposures (MMM). Sham-exposed rats did not circle, but consistently reared in the open chamber. Magnet exposure of SSM and MMM rats induced circling and suppressed rearing. After the second and third exposure to the magnet, however, MMM 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.