Basics of the Obturator Nerve - Origins & Branches

The video tutorial explores the obturator nerve, detailing its origin from the lumbar plexus and its pathway through the pelvic cavity. It differentiates the obturator nerve from the femoral nerve, highlighting their anatomical differences. The obturator nerve's descent through the obturator canal and its division into anterior and posterior branches are explained. The video also covers the muscles innervated by the obturator nerve, primarily in the medial thigh, and discusses its termination into the femoral nerve, including its cutaneous branch that relays sensory information.

From which spinal roots does the obturator nerve originate?

• L4 to L6

• L3 to L5

• L2 to L4

• L1 to L3

How can the obturator nerve be distinguished from the femoral nerve?

• The obturator nerve is thicker and more lateral.

• The obturator nerve is thinner and descends more medially.

• The obturator nerve is thicker and descends more medially.

• The obturator nerve is thinner and more lateral.

Through which structure does the obturator nerve exit the pelvis?

• Sciatic notch

• Inguinal canal

• Obturator foramen

• Femoral canal

What are the two main branches of the obturator nerve?

• Superior and inferior branches

• Proximal and distal branches

• Anterior and posterior branches

• Medial and lateral branches

Which muscles are innervated by the posterior division of the obturator nerve?

• Adductor longus and gracilis

• Quadriceps and hamstrings

• Adductor magnus and obturator externus

• Pectineus and sartorius

Where does the obturator nerve terminate?

• In the tibial nerve

• In the femoral nerve

• In the sciatic nerve

• In the peroneal nerve

What is the function of the cutaneous branch of the obturator nerve?

• Sensory information from the posterior thigh

• Motor innervation to the foot

• Sensory information from the anterior lower thigh

• Motor innervation to the leg