Lumbar lordosis is the natural, physiological forward curvature of the Spine in the lumbar region.
Definition
Lumbar lordosis is the angle between the superior endplate of SWK1 and the superior endplate of LWK1[^1].
Sagittal balance
For balanced sagittal alignment, lumbar lordosis should correspond to the Pelvic incidence ± 9 °.
Normal value
In a healthy adult, lumbar lordosis measures approximately 20-40 ° [^2]. The majority of lumbar lordosis is provided by LWK5\/SWK1 and LWK4\/LWK5.
Figure
Lumbar lordosis is optimally measured on a standing sagittal radiograph of the LWS.
