Articles by Kei Ohtsuka in JoVE
Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder Masahiko Mukaino1, Kei Ohtsuka2, Hiroki Tanikawa2, Fumihiro Matsuda2, Junya Yamada3, Norihide Itoh4, Eiichi Saitoh1 1Department of Rehabilitation Medicine, School of Medicine, Fujita Health University, 2Faculty of Rehabilitation, School of Health Science, Fujita Health University, 3Department of Rehabilitation, Fujita Health University Hospital, 4Department of Advanced Rehabilitation Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine In this study, a clinician-friendly three-dimensional gait analysis method, which was designed to be performed in the rehabilitation clinic, is presented. The method consists of a simplified measurement method and intuitive figures to facilitate clinicians' understanding of the results.
Other articles by Kei Ohtsuka on PubMed
Simple Method to Reduce the Effect of Patient Positioning Variation on Three-dimensional Motion Analysis During Treadmill Gait Clinics and Practice. | Pubmed ID: 24765518 Recently, three-dimensional (3D) closed curve trajectories of markers placed at strategic body locations, called cyclograms or Lissajous-like graphs, are used for treadmill gait analysis. A simple method is presented to reduce the effect of patient positioning variation. After breaking down movement into three components (anterior-posterior, medial-lateral and superior-inferior), the time-series data and time-inverted data are serially concatenated. A fast Fourier transform (FFT) is done, and a high-pass filter (except 0 Hz) is applied to the anterior-posterior and medial-lateral components. Next an inverse FFT is executed, and the posterior half of the outcome, corresponding to time-inverted data, is deleted. The 3D closed curve is then reconstructed. Results showed that the proposed method was able to reduce the effect of patient positioning variation. Since the adjusted curve is simply a symbolized gait pattern, the method might be useful as an adjunct tool in observational gait analysis.
Quantitative Assessment of Retropulsion of the Hip, Excessive Hip External Rotation, and Excessive Lateral Shift of the Trunk over the Unaffected Side in Hemiplegia Using Three-dimensional Treadmill Gait Analysis Topics in Stroke Rehabilitation. | Pubmed ID: 27077992 Gait assessment is important to determine the most effective strategy to regain gait function during stroke rehabilitation. To understand the mechanisms that cause abnormal gait patterns, it is useful to objectively identify and quantify the abnormal gait patterns. Objective assessment also helps evaluate the efficacy of treatments and can be used to provide suggestions for treatment.
Biomechanical Factors Behind Toe Clearance During the Swing Phase in Hemiparetic Patients Topics in Stroke Rehabilitation. | Pubmed ID: 27671158 The toe clearance of a paretic limb in the swing phase of gait is related to tripping, which is considered a major cause of falls. The biomechanical factors for obtaining toe clearance are more complicated in hemiparetic gait than that in normal gait because of the compensatory movements during swing phase. Understanding the biomechanical factors should help in targeting the point for rehabilitative interventions.