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.

Conditions affecting the L5-S1 spinal motion segment are usually treated with nonsurgical methods. If the lower back and/or leg symptoms worsen or do not improve despite these treatments, or in case of certain medical emergencies, such as tumors or cauda equina syndrome, surgery may be recommended.

2025年3月3日 · The L5-S1 motion segment provides a bony enclosure for the cauda equina nerves that continue down from the spinal cord. The L5 spinal nerve branches out from the spinal cord and exits on each side through the intervertebral foramen. It receives sensory information from the skin on parts of the low back, thigh, knee, leg, and foot.

2023年2月10日 · L5-S1 intervertebral disc provides cushioning and shock-absorbing functions to protect L5 and S1 vertebrae during spinal movements. L5 spinal nerve roots join with other nerves to form bigger nerves that extend down the spine and travel down each leg. S1 vertebra, also called the sacral base, is the wide upper end of the triangle-shaped sacrum.

Between the L5 and S1 vertebrae is a wedge-shaped intervertebral disc that provides flexibility and shock absorption. The disc is made up of a tough outer ring called the annulus fibrosus, which encapsulates a gel like interior called the nucleus pulposus. The L5-S1 disc experiences some degree of degenerative changes due to wear and tear and ...

2025年3月4日 · In some cases, severe compression of the L5 nerve root may cause lumbar radiculopathy – characterized by leg weakness and numbness. L5-S1 isthmic spondylolisthesis is typically treated with self-care, medication, and physical therapy. A wait-and-watch approach is used to see if the symptoms resolve with these non-surgical treatments.

The pain usually follows the involved dermatome in the leg - the area of distribution of the leg covered by the specific nerve. When a nerve at the L4-5 or L5-S1 level is affected (bottom two levels), this dermatome is usually the sciatic nerve, which runs …

2025年2月26日 · The two lowest segments in the lumbar spine, L5-S1 and L4-L5, carry the most weight and have the most movement, making the area prone to injury. In between vertebrae are spinal discs, which cushion the joints of the spine and provide support.

Degenerative spondylolisthesis typically occurs in the lumbar spine (low back). In most cases, the L4-L5 spinal segment is affected, followed by the L3-L4 and L5-S1 spinal segments. 1 Akkawi I, Zmerly H. Degenerative Spondylolisthesis: A Narrative Review.

2017年2月22日 · 1. Isthmic spondylolisthesis, L5-S1. 2. Bilateral pars defects chronic L5. 3. Foraminal stenosis, bilateral L5-S1. PROCEDURES: 1. Anterior lumbar interbody fusion with placement of interbody fusion device and buttress plate fixation, L5-S1. 2. Posterior spinal fusion with instrumentation, L5-S1. IMPLANTS: