What is auricular surface of sacrum? Auricular surface – Facies auricularis The lateral parts of the base of sacrum, composed by the fused transverse processes of sacral vertebrae (mainly the first), expand laterally to form
What is auricular surface of sacrum?
Auricular surface – Facies auricularis The lateral parts of the base of sacrum, composed by the fused transverse processes of sacral vertebrae (mainly the first), expand laterally to form the wings of sacrum.
What bone is the auricular surface?
sacrum
Anatomical Parts The upper half of the sacrum presents in front an ear-shaped surface, the auricular surface, covered with cartilage in the fresh state, for articulation with the ilium.
What is a auricular surface?
The anterior surface is the auricular surface, so called from its resemblance in shape to the ear, is coated with cartilage in the fresh state, and articulates with a similar surface on the side of the sacrum.
What are the parts of the sacrum?
The sacrum has a base, an apex, and three surfaces – a pelvic, dorsal and a lateral surface. The base of the sacrum, which is broad and expanded, is directed upward and forward. On either side of the base is a large projection known as an ala of sacrum and these alae (wings) articulate with the sacroiliac joints.
Where is sacrum pain located?
Sacroiliac (SI) joint pain is felt in the low back and buttocks. The pain is caused by damage or injury to the joint between the spine and hip. Sacroiliac pain can mimic other conditions, such as a herniated disc or hip problem. Accurate diagnosis is important to determine the source of pain.
Where is the median sacral crest?
In the midline of the dorsal surface, there is a central ridge of bone, called the median sacral crest. It is formed by the fusion of the spinous processes of the first three sacral vertebrae.
What is base of sacrum?
The base of the sacrum, which is broad and expanded, is directed upward and forward. In the middle is a large oval articular surface, the upper surface of the body of the first sacral vertebra, which is connected with the under surface of the body of the last lumbar vertebra by an intervertebral fibrocartilage.
What muscles attach at the sacrum?
Muscle attachments The erector spinae aponeurosis and multifidus cover the dorsal surface while the gluteus maximus attaches to the lateral borders of the sacrum.