Assay Method

An assay for the assessment of drug side effects particularly the side effect of dizziness comprising the steps of: providing a first control animal located on abeam; inducing the control animal to traverse the beam; recording the number of footslips made by the animal during the traversal; providing a second test animal located on the beam or duplicate beam; inducing the test animal to traverse the beam; recording the number of footslips made by the animal during the traversal and determining whether there is an increase, decrease or no change in the number of footslips made by the test animal in comparison to the control animal.