Fig. 1From: Subaxial lordosis loss and influence factors after posterior atlantoaxial fusionCervical sagittal parameters (C2–C7 SVA, C2–C7 sagittal vertical axis; T1S, T1 slope; NT, neck tilt; TIA, thoracic inlet angle; T1, first thoracic vertebra; M, manubrium; 1st Rib, first rib)Back to article page