Figure 1.

Photographs for a toe-to heel touch of 10-step tandem gait. Before the test, the patients stand comfortably with their feet together (A) and carefully walk 10 steps in a straight lined-up flat floor like the photos [(B) frontal and (C) side]. At the bottom, schematic diagram is the detailed 10-step tandem gait grading. According to the number of consecutive steps of the test, the patients were sub-grouped into five grades: grade 0 (impossible to walk), grade 1 (≤ 3 steps), grade 2 (< 10 steps), grade 3 (10 steps, but unstable with swaying from side to side), and grade 4 (10 steps, normal).