The L3-L4 spinal motion segment, positioned in the middle of the lumbar spine, plays an important role in supporting the weight of the torso and protecting the cauda equina (nerves that descend from the spinal cord). While the L3-L4 motion segment is less likely to be injured compared to its lower counterparts, it may be subject to degeneration ...

The third lumbar spinal nerve (L3) [3] originates from the spinal column from below the lumbar vertebra 3 (L3). L3 supplies many muscles, either directly or through nerves originating from L3. They may be innervated with L3 as single origin, or be innervated partly by L3 and partly by other spinal nerves. The muscles are:

2024年4月18日 · The L3 is a crucial component of the lumbar spine, positioned centrally among the five lumbar vertebrae. Its structure and connections play significant roles in providing support and flexibility to the lower back. Here’s a detailed look at its anatomy, including the intervertebral disc and the spinal nerve associated with L3.

The L3-L4 spinal motion segment is typically treated with nonsurgical methods. Tumors, infections, and/or other causes of severe nerve root compression with significant neurological deficits may be treated surgically.

2023年6月29日 · The L3 vertebra is the third bone in the lumbar spine, located beneath the L2 vertebra. It's part of the complex network of bones, nerves, and muscles that allow for the flexibility and movement of the lower back and lower body.

2024年12月7日 · Learn about the L3 vertebrae, its role in the lumbar spine, common conditions like L3 L4 nerve compression, and effective treatment options.

At the L3 L4 spine level, this narrowing can compress the nerves that travel to the lower extremities, causing symptoms such as pain, tingling, numbness, and weakness in the legs and feet. People with L3 L4 spinal stenosis often experience pain that worsens with standing or walking and improves when sitting or leaning forward.

The L3-L4 motion segment provides a bony enclosure for the cauda equina nerves that continue down from the spinal cord. The L3 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, and leg.

The third lumbar spinal nerve L3 is a mixed nerve, containing both somatic efferent (motor) and somatic afferent (sensory) fibers. It originates from the spinal cord at the L3 spinal segment. Like other nerves, the spinal nerve L3 is formed by the union of two roots: 1. Posterior (dorsal) root:

2025年3月15日 · Explore the anatomy, structure, and role of the L3 vertebra in the lumbar region with Innerbody's 3D model. The L3 vertebra is in the middle of the five (5) lumbar vertebrae in the lower back portion of the spinal column.