Elements of a general theory of joints. 4. Coupled joints as simple gear systems.
In the present article the relative motion in the horizontal plane of 2 adjacent lumbar vertebrae (axial rotation of the lumbar spine) and the cranial border movement of the mandible parallel to the vertical-sagittal plane are examined. The interplay of joints is depicted onto the function of a gear system with positive drive. The limits of this projection are described.
Kubein-Meesenburg
D
D
Department of Orthodontics, Institut of Physics Georg August University Göttingen, FRG.
Nägerl
H
H
Fanghänel
J
J
D006801:Humans; D007596:Joints / Q000502:physiology*; D008159:Lumbar Vertebrae / Q000502:physiology*; D008334:Mandible / Q000502:physiology*; D013284:Stomatognathic System / Q000502:physiology*