Which term refers to the greater loin muscle?

Which term refers to the greater loin muscle?

• A. Epimysium
• B. Psoas major
• C. Opponens pollicis
• D. Falciform process

Answer: (B)

The term referring to the greater loin muscle points to the psoas major. This large muscle lies in the lower back and wraps from the lumbar spine to the femur, forming a major part of the posterior abdominal wall and the iliopsoas group. In older or regional terminology, this has been described as the great or major loin muscle, which is why psoas major is the correct term. The other options aren’t loin muscles: epimysium is the connective tissue sheath around a muscle; opponens pollicis is a small muscle of the thumb; and falciform (falx) process refers to a peritoneal structure, not a muscle.

The term referring to the greater loin muscle points to the psoas major. This large muscle lies in the lower back and wraps from the lumbar spine to the femur, forming a major part of the posterior abdominal wall and the iliopsoas group. In older or regional terminology, this has been described as the great or major loin muscle, which is why psoas major is the correct term.

The other options aren’t loin muscles: epimysium is the connective tissue sheath around a muscle; opponens pollicis is a small muscle of the thumb; and falciform (falx) process refers to a peritoneal structure, not a muscle.