Musculus psoas major

The video tutorial provides an in-depth look at the psoas major muscle, part of the iliopsoas muscle group. It covers the muscle's composition, origin, and attachment points, highlighting its unique origin from the axial skeleton. The tutorial also discusses the nerve associations, particularly the lumbar plexus and femoral nerve, and the clinical relevance of these connections. The functions of the iliopsoas muscle, including hip flexion, posture support, and movement stabilization, are explained, along with its role in lateral and ventral flexion and external thigh rotation.

What is the psoas major muscle a part of?

• The hamstring muscle

• The gluteal muscle

• The iliopsoas muscle

• The quadriceps muscle

Where does the psoas major muscle originate from?

• The sacrum

• The femur

• The pelvic ring

• The axial skeleton

Which nerve accompanies the psoas major muscle?

• Obturator nerve

• Sciatic nerve

• Femoral nerve

• Tibial nerve

What is the primary function of the iliopsoas muscle?

• Hip extension

• Hip flexion

• Knee flexion

• Ankle dorsiflexion

How does the psoas major muscle contribute to body movement when the thigh is fixed?

• It abducts the hip

• It extends the knee

• It causes lateral flexion of the lumbar spine

• It rotates the ankle