Lumbosacral Joint (L5-S1): Anatomy, Function, and Pain
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 …
All about L5-S1 (Lumbosacral Joint) - Spine-health
The L5 and S1 vertebrae have different features: L5 consists of a vertebral body in front and an arch in the back that has 3 bony protrusions: a prominent spinous process in the middle and two transverse …
What Is the L5-S1 and What Problems Can It Cause?
Aug 3, 2025 · The L5-S1 segment comprises two vertebral bones: the fifth lumbar vertebra (L5) and the first sacral vertebra (S1). These vertebrae articulate, forming a junction in the lower back.
The L5 Vertebra: Anatomy and 3D Illustrations - Innerbody
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 …
L5-S1 Pain and its Causes, Symptoms, and Treatment
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.
L5 Vertebra - The 5th of the Lumbar Vertebrae
Nov 1, 2023 · L5, the fifth lumbar vertebra, is the lowest and largest of the lumbar vertebrae, and it plays a central role in supporting the lower back and connecting the lumbar spine to the sacrum, forming a …
Lumbar vertebrae - Wikipedia
Lumbar vertebrae The adjacent figure depicts the general characteristics of the first through fourth lumbar vertebrae. The fifth vertebra contains certain peculiarities, which are detailed below. As with …
L5-S1 Disc Herniation: Symptoms, Exercises & Surgery Guide
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 …
Lumbar Spine: What It Is, Anatomy & Disorders - Cleveland Clinic
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 …
L5 Spine Pain: Causes, Symptoms, and Effective Treatments
In this comprehensive guide, we will delve into what the L5 spine is, the common causes of L5 spine pain, the symptoms to watch for, and the most effective treatments available to alleviate the discomfort.