Iliopsoas
The term iliopsoas refers to the combination of the psoas major and the iliacus at their inferior end. These two muscles are distinct in the abdomen, but usually are not clearly defined as two distinctly different muscles in the thigh. The psoas muscle attaches at the lateral surfaces of the T12 and L1-L5 vertebral bodies of the spinal column. The lumbar vertebrae and all their intervertebral discs are included .
read moreSoleus Muscle Gastrocnemius Muscle Adductor Muscle Semitendinosus Muscle Biceps Femoris Muscle Iliotibial Tract Gluteus Medius Muscle Gluteus Maximus Muscle Peroneus Longus Muscle Extensor Digitorum Longus Muscle Tibialis Anterior Muscle Pectineus Muscle Vastus Lateralis Muscle Vastus Medialis Muscle Rectus Femoris Muscle Sartorius Muscle Gracilis Muscle Adductor Longus Muscle
Iliopsoas
The iliacus originates in the iliac fossa (hip bone) of the pelvis. Starting at the side of the spinal column, this is where the psoas major begins its’ attachment with the attachment ending at the distal end where it merges with the iliacus at the level of the inguinal ligament and then the iliopsoas (a united iliacus and psoas) then attaches to the femur (inner thigh bone). The iliopsoas is involved with flexion (bending) and lateral rotation of the thigh.
When a person is standing firmly on their feet in an upright position, the iliopsoas allows flexion (bending) of the trunk by supporting the movement of the body from the reinforced stability provided by the iliopsoas. The psoas minor does not contribute to the iliopsoas muscle.
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