What Is the Lumbar Spine?
The lumbar spine is the lower section of the spinal column, located between the thoracic spine and the sacrum. It contains five vertebrae that support the trunk, help guide lower-back movement, and protect nerve structures that serve the pelvis and legs. Its joints, discs, muscles, and ligaments work together during standing, walking, and bending.
Quick Facts About Lumbar Spine
Category
Lower spinal region
Used for
Assessing lower-back movement and support
Common confusion
The lumbar spine is not the entire back
Also called
Lower Back Spine, Lower lumbar spine
Often discussed with
Back Pain Treatment, Spinal Decompression Therapy
Key Takeaways About Lumbar Spine
- The lumbar spine sits between the mid-back and sacrum.
- Discs and joints help the lower back move and bear load.
- Lower-back pain does not always come from the lumbar spine.
How Lumbar Spine Works
The lumbar spine works as a mobile support section between the rib-bearing part of the back and the pelvis. Its vertebrae form joints, while discs between the vertebrae help distribute pressure during movement. Muscles and ligaments guide the region as you sit, stand, walk, or bend.
Related glossary terms: Thoracic Spine, Intervertebral Disc, Facet Joint.
Clinicians consider the lumbar spine during a back-pain assessment by observing posture, movement, muscle tension, and related nerve symptoms. The sacroiliac joint and nerve root may also be checked because nearby structures can influence how lower-back symptoms feel. A finding in the lumbar region does not automatically identify the source of pain.
From the Arrowhead Clinic Chiropractor Savannah team
When we assess the lumbar spine during Back Pain Treatment, we review how the lower back moves with the pelvis and nearby regions. We also consider muscle tension, joint motion, and reported symptoms together. This approach helps us distinguish a local movement concern from symptoms that may involve related structures.
Lumbar Spine in Practice: A Real-World Example
During a Back Pain Treatment visit, a person may report discomfort while rising from a chair and bending forward. The lumbar spine is assessed alongside hip movement and pelvic control to identify patterns that may influence the complaint.
Related Services
Related Terms
Thoracic Spine
Thoracic Spine is the middle section of the spinal column between the neck and lower back…
Intervertebral Disc
An intervertebral disc is a flexible cushion between adjacent spinal bones called vertebrae. Each disc has…
Facet Joint
A facet joint is a small paired joint at the back of the spine that connects…
Nerve Root
A nerve root is the beginning portion of a spinal nerve as it leaves the spinal…
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