title: Primary and secondary gait deviations of stroke survivors and their association with gait performance.
abstract: [Purpose] Stroke survivors exhibit abnormal pelvic motion and significantly deteriorated gait performance. Although the gait of stroke survivors has been evaluated at the primary level pertaining to ankle, knee, and hip motions, secondary deviations involving the pelvic motions are strongly related to the primary level. Therefore, the aim of this study was to identify the kinematic differences of the primary and secondary joints and to identify mechanism differences that alter the gait performance of stroke survivors. [Subjects and Methods] Five healthy subjects and five stroke survivors were recruited. All the subjects were instructed to walk at a self-selected speed. The joint kinematics and gait parameters were calculated. [Results] For the stroke survivors, the range of motion of the primary-joint motions were significantly reduced, and the secondary-joint motions were significantly increased. Additionally, for the healthy subjects, the primary joint kinematics were the main factors ensuring gait performance, whereas for the stoke survivors, the secondary-joint motions were the main factors. [Conclusion] The results indicate that while increasing the range of motion of primary-joint movements is the main target to achieve, there is a strong need to constrain and support pelvic motions in order to improve the outcome of gait rehabilitation.
authors: Department of Biomedical Engineering, BK21+ Research Institute of Biomedical Engineering, College of Biomedical and Health Science, Konkuk University, Republic of Korea.
authors: Hyung-Sik
authors: HS
authors: Kim
authors: Department of Biomedical Engineering, BK21+ Research Institute of Biomedical Engineering, College of Biomedical and Health Science, Konkuk University, Republic of Korea.
authors: Soon-Cheol
authors: SC
authors: Chung
authors: Department of Biomedical Engineering, BK21+ Research Institute of Biomedical Engineering, College of Biomedical and Health Science, Konkuk University, Republic of Korea.
authors: Mi-Hyun
authors: MH
authors: Choi
authors: Department of Biomedical Engineering, BK21+ Research Institute of Biomedical Engineering, College of Biomedical and Health Science, Konkuk University, Republic of Korea.
authors: Seon-Young
authors: SY
authors: Gim
authors: Department of Biomedical Engineering, BK21+ Research Institute of Biomedical Engineering, College of Biomedical and Health Science, Konkuk University, Republic of Korea.
authors: Woo-Ram
authors: WR
authors: Kim
authors: Department of Biomedical Engineering, BK21+ Research Institute of Biomedical Engineering, College of Biomedical and Health Science, Konkuk University, Republic of Korea.
authors: Gye-Rae
authors: GR
authors: Tack
authors: Department of Information and Communication Engineering, Dongguk University, Republic of Korea.
authors: Dae-Woon
authors: DW
authors: Lim
authors: Imaging Media Research Center, Korea Institute of Science and Technology, Republic of Korea.
authors: Sung-Kuk
authors: SK
authors: Chun
authors: Imaging Media Research Center, Korea Institute of Science and Technology, Republic of Korea.
authors: Jin-Wook
authors: JW
authors: Kim
authors: Imaging Media Research Center, Korea Institute of Science and Technology, Republic of Korea.
authors: Kyung-Ryoul
authors: KR
authors: Mun
keywords: Pelvic motion; Primary and secondary gait deviation; Stroke gait