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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 · The sacrum is a large, flat, triangular-shaped, irregular bone, alternatively known as the sacral vertebra or sacral spine. It comprises five fused vertebrae (S1-S5), located at the base of the vertebral column or spine. The bone links the spine with the hip, thus helping in hip stability.
The ala of sacrum is the upper part of the lateral part of sacrum, lateral to the first sacral vertebra. It is a large triangular surface, which supports the Psoas major and the lumbosacral trunk, and in the articulated pelvis is continuous with the iliac fossa.
12 gru 2023 · Components and Structure. The buttock bone is a concave, uneven bone, resembling an inverted triangle.
2 sie 2024 · The sacrum is an irregularly-shaped bone, shaped roughly like an inverted triangle, with its base superior and apex inferior. It is curved with an anterior concavity and posterior convexity.
The ala (wing) of sacrum is the fan-shaped, laterally located area on the base of the sacrum. It is the anterosuperior aspect of the lateral part of sacrum, lateral to the articular facet of the base, and its anterior boundary is defined by the anterior border of ala. The ala of sacrum provides an attachment site for the iliolumbar ligament.
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.
