Fig. 2
From: Clinical application of large channel endoscopic decompression in posterior cervical spine disorders
The measurement of CSA angle and Cobb angle. Jackson physiological curve; a line was drawn parallel to the trailing edge of C2 and C7, respectively, and the angle between them (CSA) represented the cervical curvature. The Cobb angle four-line measurement: the first line was parallel to the end plate of C2, the second line was parallel to the end plate of C7; two vertical lines were drawn for the above two lines, and the angle between the two perpendicular lines was the Cobb angle