Kyoto University · 의학
모모코 야마가타 교수의 연구실은 자율적 근육 공진화와 자세 안정성, 특히 다리와 체간 근육의 공진화가 자세 유지에 미치는 영향을 중심으로 연구를 진행하고 있습니다. 근육 활성화 패tern과 중심체중(CoM) 이동, 무릎 접촉력 등 생체역학적 메커니즘을 수학적 모델링과 실험적 분석을 통해 규명하며, 노화, 관절염, 수술 후 변화 등 다양한 상태에서의 자세 조절 능력의 변화를 탐구하고 있습니다. 특히 낙상 위험 평가, 성별에 따른 무릎 생체역학 차이, 수술 후 기능 회복 등 임상적 응용가능성이 높은 주제에 집중하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
We explored the effects of voluntary coactivation of agonist-antagonist leg and trunk muscles on stability of vertical posture. Young healthy subjects performed several tasks while standing with no additional muscle coactivation, low coactivation, and high coactivation. Postural stability was estimated using indices of postural sway and of intertrial variance in the space of muscle groups with parallel scaling of activation levels (M-modes). An increase in coactivation led to a significant incre
Our study compared the results of two methods of analysis of postural sway during human quiet standing, the rambling-trembling (<i>Rm</i>-<i>Tr</i>) decomposition and the analysis of the point of intersection of the ground reaction forces (<i>zIP</i> analysis). Young, healthy subjects were required to stand naturally and with an increased level of leg/trunk muscle co-activation under visual feedback on the magnitude of a combined index of muscle activation (muscle mode). The main findings includ
We verified that the high variance in segmental configurations that destabilize the CoM in the vertical direction was related to future falls. The variables of UCM analysis can be useful for evaluating fall risk.
The main objective of this study was to determine which muscle force reduction, among the vastus muscles (VAS), rectus femoris (RF), gluteus medius (Gmed), and gluteus maximus (Gmax) most significantly influenced the knee contact force. Ten young adults walked at a comfortable speed. The medial and lateral knee contact forces (KCF<sub>med</sub> and KCF<sub>lat</sub>) were computed by a musculoskeletal model with full-force-generating capacity and four muscle inactivation models that separately c
The current study is the first to consider sex as a biological variable into ambulatory mechanics in the development of KOA. We discovered that sex-dependent alterations in knee biomechanics is a function of the presence of KOA, indicating that KOA disease may be a driver of the sex-dependent biomechanical alterations or vice versa. Although no strong conclusion can be drawn because of the low quality of evidence, these findings provide new insight into the sex differences in ambulatory knee bio
