A computer simulation of human walking in persons with joint contractures

Hitoshi Kagaya, Shunichi Ito, Takehiro Iwami, Goro Obinata, Yoichi Shimada

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Joint contractures decrease the patient's ability to walk, but usually other parts of the body compensate the affected joint contractures. When we restore the gait performance in paraplegic patients by means of functional electrical stimulation, however, we cannot expect complications of compensation. A computer simulation was done to clarify how the contractures affect the gait pattern when no complications of compensation were expected. A seven-segment link mechanical model was used for simulation of human walking in the sagittal plane. In turn, using a personal computer stance and swing-leg joint contractures of the ankle, knee, and/or hip were simulated. When stance-leg contracture was simulated, step length became short with increasing hip flexion contracture. The trunk was tilted backward during knee flexion or ankle plantarflexion contracture simulation. When the swing-leg contracture was simulated, step length became short with increasing knee flexion contracture. We found that hip or knee flexion contracture of 15° or ankle plantarflexion contracture of < 0° was required to maintain positive step length and forward movement of the center of gravity. These findings suggest that 15° of hip and knee flexion contracture, and 0° of ankle plantarflexion contracture are critical when gait restoration is performed by functional electrical stimulation.

Original languageEnglish
Pages (from-to)31-37
Number of pages7
JournalTohoku Journal of Experimental Medicine
Volume200
Issue number1
DOIs
Publication statusPublished - 01-05-2003

Fingerprint

Contracture
Computer Simulation
Walking
Joints
Computer simulation
Personal computers
Restoration
Gravitation
Knee
Gait
Ankle
Hip
Leg
Electric Stimulation
Compensation and Redress
Hip Contracture
Ankle Joint
Microcomputers
Human Body

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)

Cite this

Kagaya, Hitoshi ; Ito, Shunichi ; Iwami, Takehiro ; Obinata, Goro ; Shimada, Yoichi. / A computer simulation of human walking in persons with joint contractures. In: Tohoku Journal of Experimental Medicine. 2003 ; Vol. 200, No. 1. pp. 31-37.
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A computer simulation of human walking in persons with joint contractures. / Kagaya, Hitoshi; Ito, Shunichi; Iwami, Takehiro; Obinata, Goro; Shimada, Yoichi.

In: Tohoku Journal of Experimental Medicine, Vol. 200, No. 1, 01.05.2003, p. 31-37.

Research output: Contribution to journalArticle

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