2015 Volume 6 Pages 33-42
Ohtsuka K, Saitoh E, Kagaya H, Itoh N, Tanabe S, Matsuda F, Tanikawa H, Yamada J, Aoki T, Kanada Y. Application of Lissajous overview picture in treadmill gait analysis. Jpn J Compr Rehabil Sci 2015; 6: 33-42.
Objective: To examine the usefulness of the Lissajous overview picture (LOP) that uses Lissajous figures generated from trajectories of markers in three-dimensional treadmill gait analysis.
Methods: Nineteen healthy subjects, two hemiplegic patients, and one patient with coxarthrosis were studied. Three-dimensional treadmill gait analysis was conducted and the LOP was constructed for each healthy subject and patient. Furthermore, three trained physical therapists evaluated the gait of the three patients by visual inspection of video images. The normal grand average LOP, which was obtained by averaging the LOP of all healthy subjects, was compared with the LOP of the three patients.
Results: The LOP of the patients revealed the same findings as obtained from visual evaluation of video images: circumduction in the swing phase, decreased toe clearance, hiking, and medial whip in the hemiplegic patients; as well as bilateral Duchenne gait and excessive knee flexion in the patient with coxarthrosis. In addition to the above results, the LOP of the patients showed several findings which could not be observed by visual inspection of video images only.
Conclusion: The LOP allows easy understanding of not only the movement pattern of each limb segment, but also the complete picture of gait, including the posture and symmetry, from the positional relations between the limb segments.