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일정 전기자극하의 근력 상승 - 전기 자극 파형의 펄스 진폭과 펄스폭에 대한 의존성
김지원(Ji-Won Kim),강민영(Min-Young Kang),공세진(Se-Jin Kong),엄광문(Gwang-Moon Eom) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The purpose of this work is to investigate the fundamental properties of the gradual muscle force potentiation for the prediction of muscle force and body movement from the stimulation input with musculo-skeletal model. We investigated the dependence of force potentiation on both the pulse-amplitude and the pulse-duration. The experimental result showed that the force increment ratio during electrical stimulation decreased with pulse-amplitude. The force increment ratio decreased with short pulse-duration and was maintained to be constant with pulse-duration longer than 500㎲. A new model of the muscle potentiation based on these results is desired in the future.
인체 척추움직임의 정량적 관측을 위한 운동학적 해석연구
유경석(Yoo, Kyoung-Seok),서승우(Suh, Seung-Woo),최성욱(Choi, Seong-Wook),공세진(Kang, Se-Jin) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.1
The purpose of this study was to compare and investigate the three spine models of three-dimensional kinematic spine motion during trunk movements in free normal gait by developing the spine coordinate system. A retro-reflective motion analysis system was used to measure spine motions, using three kinematic trunk models(Model I : one rigid, spine, Model II: lumbar-thoracic spine, and ModelⅢ: multi-segmental spine). Fifteen middle and high school students(age: 16.6+1.51 yrs, heights: 157±5.96 cm, weights: 45.5±4.88 kg) who have the idiopathic scoliosis were recruited as the subjects. Significant differences were noted m the total trunk motion measured between the three models. First, there was significant difference of the side-bending(p<.05) in sagittal plane during Post-hoc analysis of the ANOVA results for the three spine models. Second, the spinal column level of trunk motions revealed an differences of angular displacement during ROM(rang of motion) in frontal plane, sagittal plane and transverse plane of the multi-segmental model. These findings suggest that use of multi-segmental model provides the most interpretable findings, that is the combined movements and the couple movements allowing for differentiation of translation and rotation of x, y, 2 of three dimension in individual motion patterns.