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 from lumbar lordosis (forward curve) to sacral kyphosis (backward curve). L5-S1 helps transfer loads from the spine into the pelvis and legs.

2020年12月3日 · The sixth lumbar vertebra is typically located just below the L5 vertebra, making it the lowest vertebra and positioning it next to your tailbone. The extra bone is essentially just a harmless anomaly; sometimes it's because one vertebra failed to fuse with another, but in other cases it's unclear why the bone appeared.

2018年1月21日 · Five (or in some cases, six) vertebrae make up the lumbar spine, which provides support for much of the upper body and is rather flexible. Lumbar vertebrae are larger than the thoracic or cervical...

2023年2月14日 · Low back pain affects most adults in their lifetime. The good news is, there are a few L5-S1 exercises you can do to relieve compression and discomfort.

A significant difference in the anterior lumbosacral transitional angle was observed between patients with type-IIIb LSTV and S6 LSTV. The angle in type-IIIb LSTV was lordotic, and its transitional anatomy resembled normal L5-S1, whereas the angle in S6 LSTV ranged from hypolordotic to kyphotic, and its transitional anatomy resembled normal S1-S2.

2025年2月11日 · 6 lumbar segments (25 presacral vertebrae, completely lumbarized S1): two nerves of similar caliber at the lateral sacrum represent the L5 and S1 nerves; The iliolumbar ligament is an alternative landmark on which to base numbering (see case 4) as it usually arises from the transverse process of L5 1.

2023年10月30日 · The lumbosacral joint, also called lumbosacral symphysis, is an articulation between the fifth lumbar (L5) and first sacral (S1) vertebrae. Similarly to other joints of the vertebral column , the lumbosacral joint is formed by two separate articulations:

2024年10月28日 · l5/s1椎间盘突出通常是指腰5/骶1椎间盘突出症，这个地方突出以后严不严重不在于突出的位置，而在于突出的程度。如果l5/s1突出只是轻微突出，患者可能根本没有症状，或者根本意识不到。

The fifth lumbar vertebra (L5; 5th lumbar vertebra) is characterized by a larger and broader vertebral body than other lumbar vertebrae, which tends to increase in breadth with age, often forming reinforcing columns of bone between the bases of the pedicles and osteophytes bordering the inferior endplate.

l5/s1即腰5/骶1，是腰椎第5节和骶椎的第1节形成连接，腰5/骶1的椎间盘非常容易变性、突出，向后方或者向侧后方容易压迫到神经根上，产生下肢放射性疼痛。