What surface of the sacrum articulates with the ilium?

What surface of the sacrum articulates with the ilium?

The lateral surface of the sacrum is broad above, but narrows into a thin edge below. The upper half presents in front an ear-shaped surface, the auricular surface, covered with cartilage in the immature state, for articulation with the ilium.

Where do the ilium and sacrum articulate?

The auricular surface of the ilium articulates with the sacrum to form the sacroiliac joint. The medial surface of the upper ilium forms the iliac fossa, with the arcuate line marking the inferior limit of this area. The posterior margin of the ilium has the large greater sciatic notch.

What is the articulation of the ilium?

1. Sacroiliac Articulation (articulatio sacroiliaca). —The sacroiliac articulation is an amphiarthrodial joint, formed between the auricular surfaces of the sacrum and the ilium. The articular surface of each bone is covered with a thin plate of cartilage, thicker on the sacrum than on the ilium.

Which region of the hip bone articulates with sacrum?

Which region of the hip bone articulates with the sacrum? Ilium. The ilium is the largest region of this bone. It articulates with the sacrum at the articular surface.

What location of the sacrum articulates with the ilium quizlet?

-The sacrum articulates with the ilium of the pelvis at the auricular surface (marked A in Figs. 9-5 and 9-6) to form the sacroiliac joint.

What are the articulations of the sacrum?

Articulations

• Lumbosacral joint – Were the superior aspect of the sacrum (ie the sacral promontory) articulates superiorly with the L5 vertebral body of the lumbar spine.
• Sacroiliac joints – The alae (wings) of the sacrum articulate bilaterally with the ilium (known as sacroiliac joints).

What does the articular surface of the sacrum articulate with?

The sacroiliac articulation is the least mobile synovial joint in the body. The auricular (“ear-shaped”) surface of the sacrum articulates with the auricular surface of the os coxae. The sacral auricular surface is best seen in lateral aspect.

Where is the sacral ala?

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.

Does the femur articulate with the ilium?

The ilium is the uppermost and largest bone of the pelvis. Ilium: The ilium is the uppermost bone of the pelvis and extends laterally. The body contributes to the formation of the acetabulum, a concave structure where the head of the femur articulates to form the hip joint.

Which part of the sacrum articulates with the ilium of the hip bone quizlet?

identify the bony posterior wall of the pelivs. The sacrum articulates with the hip bones on the auricular surface of the ilium forming the sacroiliac joint.

Which part of the ilium articulates with the sacrum to form the sacroiliac joint?

Sacroiliac Joint Location The articulation between the outer side of the spine’s sacrum and the inner side of the butterfly-shaped hip bone (ilium) forms the sacroiliac joint. The SI joints are located on either side of the sacral spine and are situated deep in the pelvis.

What does the sacrum articulates with?

sacrum, plural Sacra, wedge-shaped triangular bone at the base of the vertebral column, above the caudal (tail) vertebrae, or coccyx, that articulates (connects) with the pelvic girdle. The top of the first (uppermost) sacral vertebra articulates with the last (lowest) lumbar vertebra. …

What type of articulation is the sacroiliac joint?

Articular surfaces The sacroiliac joint is a synovial-type articulation between the auricular surfaces of the sacrum and ilium. Even though it is classified as a synovial plane joint, the auricular surfaces of the sacroiliac joint show marked irregularities in forms of depressions and elevations.

What are the 3 articulations of the temporomandibular joint?

Articulating Surfaces The temporomandibular joint consists of articulations between three surfaces; the mandibular fossa and articular tubercle (from the squamous part of the temporal bone), and the head of mandible.

What is the sacroiliac joint (SIJ)?

The sacroiliac joint (SIJ) serves as the supporting base of the spine and as the point of intersection between the spinal and the lower extremity joints. The SIJ is the least understood and, therefore, one of the most controversial and interesting areas of the spine.

What is the difference between the sacrum and the ilium?

The articulating surfaces of the sacrum are L-shaped while those of the ilium are C-shaped. They allow for a small amount of movement. The sacral surface of the joint is covered by hyaline cartilage, and the ilium is covered by fibrocartilage.