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	Characterization of the Rectus Femoris Activation Patterns during Isometric Contraction in Transverse Plane: An Ultrasonography Study
	Jizhou Li; Yaoqin Xie; Lei Wang; Yongjin Zhou
	2014
会议名称	2014 International Conference on Medical Biometrics, ICMB 2014
会议地点	Shenzhen, Guangdong, China
英文摘要	Rectus femoris (RF) has long been known to be susceptible to injuries, especially in population occupationally required to stretch quadriceps forcefully. Among various RF injuries, those involve strains about the central tendon (CT) of RF are found to cost longer recovery interval than other sites. To look into thecontraction pattern of RF quantitatively, we start with sonography study of CTduring isometric knee extensions. Nine healthy male adults participated the experiments. The tilt angle of CT (TACT) was calculated manually. Inter-frame velocity field were computed using a Primal-Dual method. Captured at 25 Hz, totally 1920 sonograms were included in the experiments. TACT and the averaged velocity (AV) demonstrated interesting patterns in ramp increasing/ decreasing phases, compared to piece-wise quasi-linear torque signal. TACT appears sensitive to knee extension during the starting and ending phases only, which imply that during the starting and ending of torque output, CT experiences more dramatic changes of force from it two sides. The preliminary results of TACT and AV could be helpful for understanding of RF injuries during fast quadriceps stretch.
收录类别	EI
语种	英语
内容类型	会议论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/5914]
专题	深圳先进技术研究院_医工所
作者单位	2014
推荐引用方式 GB/T 7714	Jizhou Li,Yaoqin Xie,Lei Wang,et al. Characterization of the Rectus Femoris Activation Patterns during Isometric Contraction in Transverse Plane: An Ultrasonography Study[C]. 见:2014 International Conference on Medical Biometrics, ICMB 2014. Shenzhen, Guangdong, China.

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