Fig. 1From: Prognostic factors for surgical outcome in spinal cord injury associated with ossification of the posterior longitudinal ligament (OPLL)Cervical lordosis and K-line. Lordotic angle was created by drawing a line parallel to the inferior aspect of the C2 body and a line parallel to that of the C7 body on lateral view with the patient in a neutral position. The K-line is a straight line from the midpoints of the spinal canal at C2 and C7Back to article page