APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Structure and Function. The sacrum is made of five fused vertebrae configured as an inverted triangular bone that is concave anteriorly and convex posteriorly. Within the sacrum lies the sacral canal, which is a continuation of the vertebral canal. It terminates as the sacral hiatus.

Detailed explanation-2: -The sacrum, sometimes called the sacral vertebra or sacral spine (S1), is a large, flat, triangular-shaped bone nested between the hip bones and positioned below the last lumbar vertebra (L5). The coccyx, commonly known as the tailbone, is below the sacrum.

Detailed explanation-3: -Components of the Sacral Region (Sacrum) As part of the pelvic girdle, the sacrum forms the back wall of the pelvis and also forms joints at the hip bone called the sacroiliac joints. The sacrum contains a series of four openings on each side through which the sacral nerves and blood vessels run.

Detailed explanation-4: -The sacroiliac joint connects the spine to the pelvis. Without it, you wouldn’t be able to stand or walk. As the name suggests, the sacroiliac joint sits between the sacrum and the iliac bones of the lower back, in the area where the spine meets the pelvis.

Detailed explanation-5: -The bottom of the spine is called the sacrum. It is made up of several vertebral bodies usually fused together as one. The remaining small bones or ossicles below the sacrum are also fused together and called the tailbone or coccyx.