Midsagittal Anatomy of Lumbar Lordosis in Adult Egyptians: MRI Study
Table 1
Definitions of measured lumbar parameters.
ā
Parameter
Abbreviation
Definition
1
Angle of lumbar lordosis
LLA
The angle between two straight lines passing along the upper border of the body of first lumbar vertebra (L1) and the upper sacral border.
2
Height of lumbar spine curvature
LH
The maximum distance between the upper anterior end of first lumbar vertebra (L1) to that of sacrum.
3
Breadth of lumbar spine curvature
LB
The maximum distance between the deepest point of lumbar curvature (at the back of upper part of L4 body) to the line representing the length of lumbar curvature.
4
Anterior height of lumbar vertebral body
AL (1 to 5)
The maximum distance between superior and inferior limits of the anterior border of lumbar vertebral body at the midsagittal plane.
5
Posterior height of lumbar vertebral body
PL (1 to 5)
The maximum distance between superior and inferior limits of the posterior border of lumbar vertebral body at the midsagittal plane.
6
Anterior height of intervertebral disc
AD (L1/2 to L5/S1)
The maximum distance between superior and inferior limits of the anterior border of lumbar intervertebral disc at the midsagittal plane.
7
Posterior height of intervertebral disc
PD (L1/2 to L5/S1)
The maximum distance between superior and inferior limits of the posterior border of lumbar intervertebral disc at the midsagittal plane.