The L5-S1 spinal motion segment, also called the lumbosacral joint, is the transition region between the lumbar spine and sacral spine in the lower back. In this region, the curvature of the spine changes …

Dec 14, 2025 · L5-S1 consists of the last bone in the lumbar spine (low back), called L5, and the triangle-shaped bone under it, known as the sacrum. The sacrum is made of five fused bones—S1 is …

Aug 3, 2025 · Understand the L5-S1 spinal segment, its critical function, common problems, what symptoms to expect, and how they are typically managed.

The L5-S1 segment sits at the base of your spine, where the lumbar spine meets the sacrum. This area is crucial for movement and stability, but it’s also highly vulnerable to injury and degeneration.

Dec 31, 2025 · The fifth lumbar vertebra (or the L5 vertebra) is the largest and most inferior of the lumbar vertebrae. As the last of the lumbar vertebrae, the L5 vertebra bears more body weight than …

Feb 17, 2022 · Your lumbar vertebrae, known as L1 to L5, are the largest of your entire spine. Your lumbar spine is located below your 12 chest (thoracic) vertebra and above the five fused bones that …

Dec 30, 2025 · The L5-S1 is what I call the “workhorse junction” of your spine. It’s the single point where your flexible lumbar spine meets your rigid sacrum, and it bears the brunt of nearly every movement …

Nov 4, 2024 · Learn about the causes of pain at L5-S1, including disc prolapse and nerve compression, and explore the best treatment options for relief and recovery.

The L5 vertebra, or the fifth lumbar vertebra, is the lowest bone in your lumbar spine, situated just above the sacrum. It plays a crucial role in supporting your upper body, enabling movement, and protecting …

Jul 24, 2023 · The L5 S1 joint (or the lumbosacral joint) is a combination of the fifth lumbar vertebra and the first sacral vertebra. It is an important joining that connects the trunk to the lower extremities.