The Rotation Test is a sensitive system to measure sensorimotor impairment by unilateral damage to the dopaminergic system.
The rotometer bowls are hemispheres with a 50 cm diameter. In this apparatus unilaterally lesioned animals are more likely to show rotation behavior compared to e.g. the open field apparatus. Animals are placed in the rotometer bowls and their behavior during the test session is videotaped. The test is performed under standard light illumination. Clockwise and counterclockwise rotations are automatically counted with a tracking system.