| Iliopsoas | |
|---|---|
 Anterior hip and thigh muscles. | |
| Details | |
| Origin | Iliac fossa and lumbar spine |
| Insertion | Lesser trochanter of femur |
| Artery | Medial femoral circumflex artery and iliolumbar artery |
| Nerve | Branches from L1 to L3 |
| Actions | Flexion of hip |
| Antagonist | Gluteus maximus and the posterior compartment of thigh |
| Identifiers | |
| Latin | musculus iliopsoas |
| TA98 | A04.7.02.002 |
| TA2 | 2593 |
| FMA | 64918 |
| Anatomical terms of muscle | |
The iliopsoas muscle (/ˌɪlioʊˈsoʊ.əs/; from Latin ile 'groin' and Ancient Greek ψόᾱ (psóā) '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. They are usually given the common name iliopsoas. The iliopsoas muscle joins to the femur at the lesser trochanter. It acts as the strongest flexor of the hip.
The iliopsoas muscle is supplied by the lumbar spinal nerves L1–L3 (psoas) and parts of the femoral nerve (iliacus).