肱二头肌
肌电图
后备箱
物理医学与康复
运动学
股内侧肌
医学
地面反作用力
运动分析
运动范围
生物力学
美第斯
人口
物理疗法
解剖
计算机科学
物理
人工智能
环境卫生
生物
经典力学
生态学
作者
Pamela J. Millington,Barbara M. Myklebust,Georgia M. Shambes
摘要
The sit-to-stand motion of ten healthy subjects, 65 to 76 years old, was evaluated using kinematic, force plate, and electromyographic data to characterize the sit-to-stand motion. Kinematic data collected by video, muscle activity monitored by surface electromyography, and ground reaction forces analyzed by a piezoelectric force plate were used for analysis. Using these synchronized data, three phases of the sit-to-stand motion were identified--phase 1, weight shift; phase 2, transition; and phase 3, lift. A consistent pattern of trunk and lower extremity motion was observed, and two distinct upper extremity movement strategies were identified. The onset of muscle activity occurred in the following order: erector spinae, rectus femoris, and vastus medialis (phase 1); biceps femoris, gluteus maximus, and rectus abdominus (phase 2). This characterization of the sit-to-stand motion for a small population of healthy elderly subjects serves as a basis for identifying problems in elderly patients who demonstrate difficulty getting up from a chair.
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