All About the L4-L5 Spinal Segment - Spine-health
The L4 and L5 are the two lowest vertebrae of the lumbar spine. Together with the intervertebral disc, joints, nerves, and soft tissues, the L4-L5 spinal motion segment provides a variety of functions, including supporting the upper body and allowing trunk motion in …
Anatomy, Back, Lumbar Spine - StatPearls - NCBI Bookshelf
2023年8月14日 · The lumbar spine comprises the lower end of the spinal column between the last thoracic vertebra (T12) and the first sacral vertebra (S1). The spinal cord in this region has protection from five durable and mobile vertebrae (L1-L5) that allow for the dispersion of …
L4 Lumbar Spine Vertebrae Anatomy, Function & Diagram - Healthline
2018年1月21日 · The fourth lumbar spine vertebra (L4) is located towards the bottom of the lumbar section, near the sacral vertebrae at the bottom of the spine. Like the other lumbar spinal bones,...
Lumbar Spine: What It Is, Anatomy & Disorders - Cleveland Clinic
2022年2月17日 · Your lumbar spine is located below your 12 chest (thoracic) vertebra and above the five fused bones that make up your triangular-shaped sacrum bone. Compared with other spine vertebrae, your lumbar vertebrae are larger, thicker and more block-like bones.
Lumbar vertebrae: anatomy of the bony lumbar spine | Kenhub
2023年11月16日 · The lumbar vertebrae are five in number and desginated as vertebrae L1-L5. They are primarily responsible for bearing the weight of the upper body (and permitting movement) and consequently represent the largest individual segments of the vertebral column.
Fourth Lumbar Vertebra | Complete Anatomy - Elsevier
The fourth lumbar vertebra (vertebra L4) is the one of the five lumbar vertebrae of the vertebral column. It is classified as an irregular bone and includes the following bony features: - parts: vertebral body, laminae, pedicles, superior and inferior articular processes, and transverse and spinous processes; - surfaces: superior and inferior ...
The Lumbar Vertebrae: Anatomy and 3D Illustrations - Innerbody
3 天之前 · Unlike the cervical vertebrae in the neck, the lumbar vertebrae lack the transverse foramina in the transverse processes, and also lack facets to either side of the body. The fifth lumbar vertebra is distinct from the L1-4 vertebrae in being much larger on …
Spinal Motion Segment: L4-L5 Animation - Spine-health
This segment helps provide flexibility to the trunk and low back, supports the upper body, and protects the cauda equina and nerve pathways. The L4 and L5 vertebrae are connected in the back by a pair of facet joints that allow limited forward, backward, and twisting motions.
Spinous Process of Fourth Lumbar Vertebra | Complete Anatomy …
The spinous process is the single, posteriorly projecting process located at the posterior part of the vertebral arch of a lumbar vertebra. It extends from the junction between the two laminae, which itself is found at the midline.
Vertebral Body of Fourth Lumbar Vertebra | Complete Anatomy
The vertebral body of the fourth lumbar vertebra provides origin sites for the psoas major muscles, as well as attachment sites for the anterior and posterior longitudinal ligaments. Overall, the sizes of the vertebral bodies gradually increase caudally along the vertebral column.