Musculoskeletal System Quiz Lumbar and Sacral Plexus

What is the origin of the lumbar plexus?

• Ventral rami L1 – L4 & thoracic spinal n. 12

• Ventral rami L3 – L4 & lumbar spinal n. 1

• Ventral rami L4 – L5 & sacral spinal n. 1

• Ventral rami L2 – L3 & thoracic spinal n. 11

Which of the following is NOT a terminal branch of the lumbar plexus?

• Tibial

• Obturator

• Femoral

• Ilio-hypogastric

What area does the lumbar plexus supply?

• Skin and musculature of the lower limb

• Head and neck

• Upper limb

• Thoracic cavity

Which nerve is the largest in the sacral plexus?

• Obturator nerve

• Sciatic nerve

• Pudendal nerve

• Femoral nerve

What is the primary function of the tibial nerve?

• Supplies the muscles of the anterior compartment of the leg

• Supplies the skin of the lateral leg

• Supplies muscles of the posterior compartment of the thigh

• Supplies the skin of the anterior thigh

Which of the following nerves is responsible for sensory innervation of the medial thigh?

• Femoral nerve

• Obturator nerve

• Sciatic nerve

• Common peroneal nerve

What mnemonic is used to remember the branches of the sacral plexus?

• Big Cats Hunt at Night

• Some Elephants Play in Water

• Some Irish Sailor Pesters Polly

• Alligators Swim in the River

Which nerve supplies the pelvic floor muscles?

• Pudendal nerve

• Ilio-inguinal nerve

• Genitofemoral nerve

• Lateral femoral cutaneous nerve

What is the function of the common peroneal nerve?

• Supplies the skin of the medial thigh

• Supplies the pelvic floor muscles

• Supplies the muscles of the anterior compartment of the leg

• Supplies the skin of the posterior thigh

Which nerve emerges from the medial side of the psoas major?

• Femoral nerve

• Obturator nerve

• Ilio-hypogastric nerve

• Sciatic nerve