https://www.selleckchem.com/pr....oducts/pluronic-f-68
A variety of medical imaging procedures, cadaver experiments, and computer models have been utilized to capture, depict, and understand the motion of the human lumbar spine. Particular interest lies in assessing the relative movement between two adjacent vertebrae, which can be represented by a temporal evolution of finite helical axes (FHA). Mathematically, this FHA evolution constitutes a seven-dimensional quantity one dimension for the time, two for the (normalized) direction vector, another two for the (unique) position vector
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