Kei Ohtsuka, RPT, DMSc, Eiichi Saitoh, MD, DMSc, Hitoshi Kagaya, MD, DMSc,
Norihide Itoh, RPT, DMSc, Shigeo Tanabe, RPT & Eng, PhD, Fumihiro Matsuda, RPT,
Hiroki Tanikawa, RPT, Junya Yamada, RPT, Takemitsu Aoki, Eng,
Yoshikiyo Kanada, RPT, DMSc
Jpn J Compr Rehabil Sci 6: 33-42, 2015
Objective: To examine the usefulness of the Lissajous
overview picture (LOP) that uses Lissajous figures
generated from trajectories of markers in threedimensional
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.
Key words: three-dimensional motion analysis, treadmill walking, Lissajous' figure, Lissajous overview picture