A method of two-dimensional measurement for evaluating finger motion impairment. A description of the method and comparison with angular measurement.

A new method has been designed for direct measurement of the two-dimensional range of motion (ROM) of the finger. The two-dimensional method encompasses the postures imposed by various combinations of contraction and relaxation of the finger motors, so that an individual muscle injury or adhesion might be more easily detected. The figures and values obtained from the two-dimensional method are easier to interpret than those from conventional measurements, making the progress of the rehabilitated finger more apparent. Since the passive ROM cannot be evaluated by this method, it is a supplement rather than a substitution for the conventional range of motion evaluation for each joint. The drawback of the two-dimensional method is that it is more difficult to use than the conventional method.