Psoas major muscle

In this article we will discuss about Psoas major muscle. So let’s get started.

Psoas major muscle

It is divided into two part; superficial part arises from the lateral surface of T12, L1-L4 and neighbouring intervertebral discs and deep part originates from the transverse process of L1-L5 and gets inserted into the lesser trochanter of femur along with iliacus, thereby forming iliopsoas. It is innervated by the lumbar plexus, L1-L3 and artery supply is through the lumbar branch of iliolumbar artery. It’s chief action is flexion of hip along with that it also causes lateral rotation and adduction of hip and unilateral contraction bends the trunk laterally while bilateral contraction raises the trunk from supine position. Clinically, Psoas syndrome is a very rare condition occurs when psoas muscle gets injured causing lower back pain. It is often misdiagnosed. Athletes are more prone to this disease. Physiotherapy is treatment of choice for psoas syndrome.



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