Psoas major muscle

Psoas Major Muscle

The Psoas Major Muscle is a long fusiform muscle located on the side of the lumbar region of the vertebral column and brim of the lesser pelvis. It joins the iliacus muscle and together they are referred to as the iliopsoas.

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Psoas Major Muscle

Anatomy

The psoas major originates from the 12th thoracic vertebra (T12) and the lumbar vertebrae. The muscle extends through the pelvic region and inserts into the lesser trochanter of the femur. This muscle is divided into a superficial and deep part.

Function

The psoas major muscle plays a crucial role in maintaining upright posture, and it is also important for walking and running. It is the chief flexor of the hip joint and also performs lateral rotation.

Clinical Significance

A tight or overstretched psoas major muscle could lead to lower back pain or hip pain. It can also be associated with a condition known as psoas syndrome.

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Stretching the Psoas Major Muscle

See Also

• Iliopsoas
• Psoas minor muscle
• Psoas abscess

External Links

• Psoas Major Muscle on Wikimedia Commons