Columbus Instruments' implementation of the classic rotating rod enhanced with features that assist monitoring and recording animal performance. Up to four animals may be simultaneously tested for their ability to maintain themselves upright on a rotating rod. Animals are placed on a spindle within a lane sized to the subject under test. The operator may select accelerating or constant speed mode of operation as well as a slow speed waiting mode before acceleration takes place. Speed and acceleration rate are programmable. An animal fall is detected by infrared photo-cells which cross the space just above the spindle. Once all the photocells loose sight of the animal, the time is recorded.