Psoas vs. Iliopsoas — What's the Difference?

The larger of two muscles that originate in the lower spine. This muscle flexes the hip. Also called psoas major.

The iliopsoas muscle (; from Latin: ile, lit. 'groin' and Ancient Greek: ψόᾱ, romanized: psóā, lit. 'muscles of the loins') refers to the joined psoas major and the iliacus muscles. The two muscles are separate in the abdomen, but usually merge in the thigh.

The smaller of two muscles that originate in the lower spine. This muscle flexes the lower spine. Also called psoas minor.

(muscle) A compound muscle composed of the iliac and psoas muscles.

(anatomy) Either of two muscles, the psoas major and psoas minor, involved in flexion of the trunk.

The great flexor muscle of the hip joint, divisible into two parts, the iliac and great psoas, - often regarded as distinct muscles.

An internal muscle arising from the lumbar vertebræ and inserted into the femur. In man there are usually two on each side, and the larger one, or great psoas, forms a part of the iliopsoas.

Either of two muscles of the abdomen and pelvis that flex the trunk and rotate the thigh