Methods, difficulties and inaccuracies in the study of human joint kinematics and pathokinematics by the instant axis concept. Example: the knee joint.
D001696:Biomechanical Phenomena; D007592:Joint Diseases / Q000503:physiopathology; D007596:Joints / Q000502:physiology*; D007719:Knee Joint / Q000502:physiology*; D008954:Models, Biological; D009068:Movement; D012399:Rotation