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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.
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.
12 gru 2023 · Learn about sacrum bone/sacral vertebra, its definition, parts (base, ala, surfaces, muscles, nerves), & articulation, with labeled pictures.
2 sie 2024 · The sacrum is the penultimate segment of the vertebral column and also forms the posterior part of the bony pelvis. It transmits the total body weight between the lower appendicular skeleton and the axial skeleton. Gross anatomy.
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.
11 paź 2023 · On either side of the lumbosacral joint are winglike structures called sacral ala, which connect to the iliac bones and form the top of the sacroiliac joint. Attached to either side of the sacrum are the iliac bones. These wings of the pelvis provide stability and strength for walking and standing.
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.
