Iliopsoas
Iliopsoas
Iliopsoas (/ˌɪlioʊˈsoʊ.æs/) is a composite muscle formed by the combination of the Psoas major and the Iliacus muscle. It is part of the hip flexors and plays a significant role in walking and running.
Etymology
The term "Iliopsoas" is derived from the combination of "ilio", referring to the ilium, and "psoas", referring to the Psoas major. The term "psoas" is of Greek origin, meaning "muscle of loin".
Function
The Iliopsoas is the strongest of the hip flexors. It is responsible for flexing the hip joint and lifting the upper leg towards the body, a movement known as flexion. It also plays a role in side-bending and rotation of the trunk.
Related Terms
- Psoas major: One of the muscles that make up the iliopsoas. It originates from the lumbar vertebrae and joins the iliacus muscle at the lesser trochanter of the femur.
- Iliacus muscle: This muscle also forms part of the iliopsoas. It originates from the iliac fossa on the interior side of the hip bone and joins the psoas major to insert on the femur.
- Hip flexors: A group of muscles, including the iliopsoas, that act to flex the hip joint.
- Flexion: A movement that decreases the angle between two body parts. In the case of the iliopsoas, this refers to the action of lifting the upper leg towards the body.
- Trunk (anatomy): The central part of the body to which the neck and limbs are attached. The iliopsoas plays a role in its side-bending and rotation.
External links
- Medical encyclopedia article on Iliopsoas
- Wikipedia's article - Iliopsoas
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