2021年12月27日 · Learn about sacrum bone/sacral vertebra, its definition, parts (base, ala, surfaces, muscles, nerves), & articulation, with labeled pictures

Sacrum and Coccyx. The sacrum is formed from the fusion of five sacral vertebrae, whose lines of fusion are indicated by the transverse ridges. The fused spinous processes form the median sacral crest, while the lateral sacral crest arises from the fused transverse processes.

2023年10月11日 · Along with the coccyx (tailbone), the sacrum provides a stable platform to help you sit upright. This article discusses the anatomy and function of the sacrum bone. It also looks at some health conditions related to the sacrum bone.

The sacrum articulates with the intervertebral disc under the L 5 vertebra above it with its superior articular processes and facets and body of the first sacral vertebra. The sacrum also articulates with two coxal bones (hip bones) lateral to it at the auricular surfaces .

2022年11月2日 · The sacrum and coccyx bones sit inferior to the fifth lumbar vertebra. They are composed of individual vertebra that usually fuse during early adulthood. Click and start learning now!

This photo gallery presents the anatomy of sacrum and coccyx by means of 3D-reconstructions, axial, sagittal and coronal reconstructions obtained from a scan of pelvis.

Like the sacrum, they are fused into a single bone — the coccyx (os coccygis). The coccyx has a base (basis) , an apex (apex) , as well as a coccygeal cornu (cornu coccygeum) , which is used on each side to articulate with the sacrum.

2021年12月16日 · The sacrum is composed of five fused sacral vertebrae (named S1 to S5 from top to bottom). Each of these fused vertebrae have a pair of foramina (holes) (posterior and anterior sacral foramina) out of which exit the sacral nerves.

2025年1月28日 · Lumbar Spine (5 Vertebrae): Labeled L1 to L5, situated in the lower back, characterized by larger, weight-bearing vertebrae. Sacrum (5 Fused Vertebrae): A triangular bone located at the base of the spine, forming the posterior part of the pelvis. Coccyx (4 Fused Vertebrae): Known as the tailbone, located at the very bottom of the spine.

2025年1月25日 · The sacrum tapers to a point at its inferior end, where it forms the fibrocartilaginous sacrococcygeal joint with the tiny coccyx (tail bone). On the left and right lateral sides the sacrum forms the sacroiliac joints with the ilium of the hip bones to form the rigid pelvis.