Transversus Abdominis originates from cartilage of ribs 6-12 and which structure?

Transversus Abdominis originates from cartilage of ribs 6-12 and which structure?

• A. Iliac Crest
• B. Cartilage of Ribs 6-12, Iliac Crest
• C. Ribs 5-12
• D. Pubis

Answer: (B)

Transversus abdominis is the deepest layer of the abdominal wall, with horizontal fibers that help compress the abdomen and stabilize the spine. It has multiple origins along the lateral and posterior abdominal walls, including the costal cartilages of the lower ribs and the iliac crest, among other structures. When the rib cartilages are given as part of the origin, the iliac crest completes its attachment, forming the typical combined origin. The pubis isn’t a primary starting point for this muscle, and while the lower rib cartilages are involved, the iliac crest is the key additional structure that best matches the stated origin.

Transversus abdominis is the deepest layer of the abdominal wall, with horizontal fibers that help compress the abdomen and stabilize the spine. It has multiple origins along the lateral and posterior abdominal walls, including the costal cartilages of the lower ribs and the iliac crest, among other structures. When the rib cartilages are given as part of the origin, the iliac crest completes its attachment, forming the typical combined origin. The pubis isn’t a primary starting point for this muscle, and while the lower rib cartilages are involved, the iliac crest is the key additional structure that best matches the stated origin.