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L-spine Anatomy/Body Parts
Updated March 2026

Lumbar Spine (L-spine)

Definition

The five vertebrae (L1-L5) of the lower back that bear the majority of the body's weight and are the most common site of industrial spinal injuries. Lumbar conditions including disc herniations, degenerative disc disease, stenosis, and radiculopathy account for a large percentage of workers' compensation claims and impairment ratings.

Related Terms

Frequently Asked Questions

What is a Lumbar Spine (L-spine)?

The five vertebrae (L1-L5) of the lower back that bear the majority of the body's weight and are the most common site of industrial spinal injuries. Lumbar conditions including disc herniations, degenerative disc disease, stenosis, and radiculopathy account for a large percentage of workers' compensation claims and impairment ratings.

How is lumbar spine evaluated in a workers' compensation exam?

Lumbar Spine is assessed during the physical examination portion of a QME or AME evaluation. The examining physician documents range of motion, functional limitations, and any objective findings related to lumbar spine to support their impairment rating.