Nov 1, 2024 · The sacrum consists of five fused sacral vertebral and costal segments (S1-S5) that form a central sacral body and paired sacral alae (singular ala), which arise laterally from S1. …

Degenerative spinal conditions are a frequent source of sacral nerve problems. A herniated disc in the lower lumbar region can press on nerve roots descending into the sacrum. Spinal stenosis, …

Jun 11, 2016 · The wider sacrum of the female results in a larger pelvic inlet (i.e., region bounded by the pecten of the pubis, arcuate line of the ilium, sacral ala, and sacral promontory). A …

It is a triangular bone composed of three to five fused segments. The largest segment articulates with the lowest sacral segment.

Jun 3, 2025 · The sacrum and coccyx, located at the base of the vertebral column, form a critical foundation for the pelvis, with the sacrum arising from five fused sacral vertebrae and the …

Jul 30, 2023 · Many more anatomical differences exist, such as a variation in the number of sacral foramina, as well as morphological defects, such as sacral agenesis, sacral spina bifida, and …

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 …

Jul 29, 2017 · In this chapter, we set out to describe the bony anatomy of the sacrum and how it relates to the pelvis, and its contents, as a whole. The relevant neurovascular structures within …

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

Oct 30, 2023 · Bony structures and ligaments of the sacrum and coccyx. The sacrum is an irregularly shaped bone, made up of a group of five fused vertebrae in the area of what is …