Deficits in fine motor coordination can be assessed with the balance beam test. Performance on the beam is quantified by the speed at which the beam is traversed and the number of times the mouse slips on the beam.
Luong, T. N., Carlisle, H. J., Southwell, A., Patterson, P. H. Assessment of Motor Balance and Coordination in Mice using the Balance Beam. J. Vis. Exp. (49), e2376, doi:10.3791/2376 (2011).