Musculus iliopsoas

The tutorial focuses on the iliopsoas muscle, part of the anterior group of dorsal hip muscles. It consists of the psoas major and iliacus muscles, which are innervated by the femoral nerve and lumbar plexus. The psoas major originates from the lumbar vertebrae, while the iliacus originates from the iliac fossa. These muscles unite to form the iliopsoas muscle, which is the strongest flexor of the hip joint and plays a crucial role in movement and stabilization of the pelvis.

Which group of muscles does the iliopsoas belong to?

• Anterior group of dorsal hip muscles

• Posterior group of dorsal hip muscles

• Lateral group of hip muscles

• Medial group of hip muscles

What is the origin of the psoas major muscle?

• Iliac fossa of the inner surface

• Inguinal ligament

• First to fourth lumbar vertebral body

• Trochanter minor of the femur

Where do the psoas major and iliacus muscles unite?

• Above the ligament in biennial

• Below the femoral nerve

• At the iliac crest

• Near the lumbar plexus

What is the primary function of the iliopsoas muscle?

• Extension of the knee joint

• Stabilization of the ankle

• Flexion of the hip joint

• Rotation of the shoulder

What happens during a bilateral contraction of the iliopsoas muscle?

• The pelvis tilts

• The trunk straightens

• The trunk rotates

• The leg extends