Fig. 4
From: Study on articular surface morphology of atlantoaxial lateral mass based on differential manifold
a Sagittal diameter of the atlas lateral mass; b Transverse diameter of the atlas lateral mass; c area of the atlas lateral mass; d curvature of the atlas lateral mass; A Sagittal diameter of the axis lateral mass; B Transverse diameter of the axis lateral mass; C area of the axis lateral mass; D curvature of the atlas lateral mass; H height of the atlantoaxial joint space