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The sacrum situates at the upper, back part of the pelvic cavity, between the two wings of the pelvis. It forms joints with four other bones. The two projections at the sides of the sacrum are called the alae (wings), and articulate with the ilium at the L-shaped sacroiliac joints.
27 gru 2021 · Parts and Anatomy. The sacrum is a concave, irregular bone, resembling an inverted triangle. The widest part, called the base, is at the top, and the pointy end, called the apex, is at the bottom. It also has three surfaces – dorsal, lateral, and pelvic.
2 sie 2024 · The sacrum consists of five fused sacral vertebral and costal segments (numbered one-to-five) that form a central sacral body and paired sacral alae (singular ala), which arise laterally from S1. As the sacrum develops, costal elements form the parts superior, lateral and inferior to the anterior sacral foramina.
Sacroiliac joints - The alae (wings) of the sacrum articulate bilaterally with the ilium (known as sacroiliac joints). They form an essential connection between the axial skeleton and the appendicular skeleton, and function to transfer force from the lower limbs to the vertebral column.
The sacral region (sacrum) is at the bottom of the spine and lies between the fifth segment of the lumbar spine (L5) and the coccyx (tailbone). The sacrum is a triangular-shaped bone and consists of five segments (S1-S5) that are fused together.
30 paź 2023 · Regarded as the keystone of the human body, the sacrum is important because it forms a link between the spine and the iliac bones, and also has an important part to play in hip stability. Sacrum is sexually dimorphic. It is shorter and wider in females than in males.
KEY WORDS. spine. sacrum. anatomy. The human spine can be thought of as a complex col-umn in which is combined significant structural support with constrained motion located through its 24 articulat-ing vertebrae.
