Research Article

Midsagittal Anatomy of Lumbar Lordosis in Adult Egyptians: MRI Study

Table 1

Definitions of measured lumbar parameters.

ā€‰ParameterAbbreviationDefinition

1Angle of lumbar lordosisLLAThe angle between two straight lines passing along the upper border of the body of first lumbar vertebra (L1) and the upper sacral border.
2Height of lumbar spine curvatureLHThe maximum distance between the upper anterior end of first lumbar vertebra (L1) to that of sacrum.
3Breadth of lumbar spine curvatureLBThe 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.
4Anterior 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.
5Posterior height of lumbar vertebral bodyPL (1 to 5)The maximum distance between superior and inferior limits of the posterior border of lumbar vertebral body at the midsagittal plane.
6Anterior height of intervertebral discAD (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.
7Posterior height of intervertebral discPD (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.