Anatomy Research International / 2014 / Article / Tab 1

Research Article

Morphometric Analysis of Lateral Masses of Axis Vertebrae in North Indians

Table 1

The measured parameters.

S. numberParameters of lateral mass of axis vertebrae (pedicle, SAF, IAF, FT, and angles)

1Pedicle length (PL)Length was measured from anterior most point of the pedicle axis to the posterior point of pedicle axis projection EF = PL (Figure 1(a)).
2Pedicle width (PW) It was taken from internal surface of pedicle to its external surface at the level of transverse foramen ef = PW (Figure 1(a)).
3Pedicle height (PH)It was measured from its superior surface to inferior surface with in the foramen transversarium E′F′ = PH (Figure 1(a)).
4-5Superior articular facet length (SAFL) and width (SAFW)It is the maximum anteroposterior and transverse diameter of articular surface of superior facet. (IJ = SAFL) (KL = SAFW) (Figure 1(b)).
6External height (SAFHE)It was taken from upper midpoint on the superior articular surface to the lower midpoint on the inferior surface. ST = SAFHE (Figure 2(a)).
7Internal height (SAFHI)It was taken from midpoint of articular surface to the nearest point on the inferior surface. st = SAFHI (Figure 2(b)).
8Depth of vertebral arteryIt was taken as the difference between external and internal height.
9-10Inferior articular facet length (IAFL) and width (IAFW)It is the maximum anteroposterior and transverse diameter of articular surface of Inferior facet. (ij = IAFL) (kl = IAFW) (Figure 1(c)).
11–13Foramen transversarium length (FTL), width (FTW), and depth (FTD)It is the maximum anteroposterior, transverse, and superoinferior diameter. (MN = FTL) (mn = FTW) (OP = FTD) (Figures 3(a) and 3(b)).
14Pedicle superior angle (PSA)It was measured as the angle between the pedicle axis and a line drawn perpendicular to the body of the axis read as PSA (Figure 4).
15Pedicle median angle (PMA)It was measured as the angle between the pedicle axis and line passing through the midline of the vertebral body and the spinous process and read as PMA (Figure 5).