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 multiple directions. 1 Waldman SD. Functional Anatomy of the Lumbar Spine.

2017年11月15日 · 1、人体的腰椎l1~l5共有5块； 2、每一块腰椎由前方的椎体和后方的附件组成。 3、腰椎的结构有椎体、椎弓根、椎板、棘突、横突及上关节突、下关节突，与胸椎不同，椎体及椎弓根较大；

2022年2月17日 · L2, L3 and L4 spinal nerves provide sensation to the front part of your thigh and inner side of your lower leg. These nerves also control hip and knee muscle movements. L5 spinal nerve provides sensation to the outer side of your lower leg, the upper part of your foot and the space between your first and second toe. This nerve also controls hip ...

Two consecutive vertebrae, such as L4-L5, stacked vertically. An intervertebral disc that has a soft inner gelatinous core surrounded by a tough fibrous covering is situated between the vertebrae. The disc acts like a shock absorber in the spine, allowing flexibility and providing protection from jarring movements.

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.

Most individuals have five lumbar vertebrae, while some have four or six. Lumbar disorders that normally affect L5 will affect L4 or L6 in these latter individuals.

l5脊神经控制臀部，膝盖，脚和脚趾的运动。 L4和L5神经与其他的神经构成 坐骨神经 (sciatic nerve)，该神经从后骨盆向下延伸到腿后部，并终止于脚部。 由这条神经引起的症状和体征，通常称为 坐骨神经痛 (sciatica)，可引起剧烈的灼痛，并伴有无力和麻木，并向下 ...

A multilevel spinal fusion involves fusing two or more levels of the spine, such as the L4-L5 and L5-S1 spinal segments. Multilevel fusions considerably limit the normal motion in the lower back and place more stress across the remaining mobile joints. Watch Stages of Bone Healing in Lumbar Spine Fusion Surgery Video

根据国际公认的标准,汽车自动驾驶可分为六个等级:l0级到l5级,等级越高意味着自动化程度越高。 那么这六个等级具体有何区别呢?本文将详… 切换模式

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.