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전방십자인대 재건수술 환자와 정상인의 보행 연구

Gait Study on the Normal and ACL Deficient Patients After Ligament Reconstruction Surgery Using Chaos Analysis Method


The anterior cruciate ligament(ACL) is an important stabilizer of knee joint. The ACL injury of knee is common and a serious ACL injury leads to ligament reconstruction surgery. Gait analysis is essential to identify knee condition of patients who display abnormal gait. The purpose of this study is to evaluate and classify knee condition of ACL deficient patients using a nonlinear dynamic method. The nonlinear method focuses on understanding how variations in the gait pattern change over time. The experiments were carried out for 17 subjects(l2 healthy subjects and five subjects with unilateral deficiency) walking on a motorized treadmill for 100 seconds. Three dimensional kinematics of the lower extremity were collected by using four cameras and KWON 3D motion analysis system. The largest Lyapunov exponent calculated from knee joint flexion-extension time series was used to quantify knee stability. The results revealed the difference between healthy subjects and patients. The deficient knee was significantly unstable compared with the contralateral knee. This study suggests an evaluation scheme of the severity of injury and the level of recovery. The proposed Lyapunov exponent can be used in rehabilitation and diagnosis of recoverable patients.

참고문헌 (20)

  1. Moon, B. Y., Son, K., Park, J. H. and Suh, J. T., 2003, 'A Method to Describe and Analyze Human Knee Joint Motion,' Journal of KSPE, Vol. 20, No. 10, pp. 233-239 
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  5. Stergiou, N., Moraiti, C., Giakas, G., Ristanis, S. and Georgoulis, A. D., 2004, 'The Effect of the Walking Speed on the Stability of the Anterior Cruciate Ligament Deficient Knee,' Clinical Biomechanics, Vol. 19, No. 9, pp. 957-963 
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  12. Ko, J. H., Son, K., Park, J. H. and Suh, J. T., 2006, 'Gait Study on the Normal and ACL Deficient Patients after Ligament Reconstruction Surgery Using Chaos Analysis,' Journal of KSPE, Vol. 23, No. 2, pp. 164-171 
  13. Park, K. B., Ko, J. H., Son, K., Moon, B. Y. and Suh, J. T., 2006, 'Application of Chaos Theory to Gait Analysis,' Transection of KSME (A), Vol. 30, No. 2, pp. 194-201 
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이 논문을 인용한 문헌 (2)

  1. Park, Jung-Hong ; Kim, Kwang-Hoon ; Son, Kwon 2007. "Chaos Analysis of Major Joint Motions for Young Males During Walking" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. A. A, 31(8): 889~895 
  2. 2008. "" Journal of mechanical science and technology, 22(3): 420~428 


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