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. 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. First-time magnet exposure of SSM and MMM rats induced circling but suppressed rearing. After the second and third daily exposure to the magnet, however, MMM rats showed decreased circling compared to their first magnet exposure. The increase in rearing in MMM rats was not significant. Percentages above bars indicate the number of rats which circled or reared. *p<0.05 vs. sham-exposure, † p < 0.05 vs. magnet exposure of SSM rats, ∘ p < 0.05 vs. first magnet exposure of MMM rats.