Iliopsoas muscle

The iliopsoas muscle is a major muscle group located in the pelvic region and is composed of two muscles: the psoas major and the iliacus. It is one of the most important muscles for hip flexion and plays a crucial role in maintaining posture and stability of the spine.

Anatomy

The iliopsoas muscle is formed by the convergence of the psoas major and the iliacus muscles.

Psoas Major

The psoas major originates from the transverse processes, bodies, and intervertebral discs of the T12 to L5 vertebrae. It travels downwards, passing through the pelvic brim to join the iliacus muscle.

Iliacus

The iliacus muscle originates from the iliac fossa on the interior side of the pelvis. It joins the psoas major to form the iliopsoas muscle.

Insertion

The iliopsoas muscle inserts into the lesser trochanter of the femur.

Function

The primary function of the iliopsoas muscle is to flex the hip joint. It is also involved in lateral rotation of the thigh and helps stabilize the lumbar spine.

Clinical Significance

The iliopsoas muscle can be involved in various musculoskeletal disorders. Tightness or spasm in this muscle can lead to lower back pain and postural imbalances.

Iliopsoas Syndrome

Iliopsoas syndrome is a condition characterized by pain and discomfort in the hip and lower back, often due to overuse or strain of the iliopsoas muscle.

Iliopsoas Bursitis

Iliopsoas bursitis is the inflammation of the bursa located between the iliopsoas muscle and the hip joint, leading to pain and restricted movement.

See Also

• Hip flexors
• Lumbar spine
• Pelvic girdle

References

• Gray's Anatomy
• Netter's Atlas of Human Anatomy