Lumbar Plexus Quiz

Which branch of the lumbar plexus is primarily responsible for supplying the anterior compartment of the thigh?

What are the root values for the Obturator Nerve?

Which of the following nerves is associated with supplying the genitals?

Which of these nerves is most directly involved in the innervation of the medial compartment of the thigh?

Which nerve enters the thigh behind the inguinal ligament?

What is a predominant function of the Iliohypogastric Nerve?

Which branch of the lumbar plexus supplies the skin of the anterior and lateral surfaces of the thigh?

How many major branches are formed by the lumbar plexus?

The Lumbar Plexus

The lumbar plexus is part of the larger lumbosacral plexus.
It's a major nervous pathway supplying the lower limb.
It's formed by the upper four lumbar nerves.
It gives off six major branches.

Branches of the Lumbar Plexus

Iliohypogastric: Supplies the abdominal wall muscles and skin; has a cutaneous branch over the buttock. (L1)
Ilioinguinal: Supplies the abdominal wall muscles and skin; has a cutaneous branch over the upper medial region. (L1)
Genitofemoral: Supplies the genitals; has a cutaneous branch over the anterior surface. (L1, L2)
Lateral femoral cutaneous: Supplies the lateral thigh skin. (L2, L3)
Femoral: Largest branch of the lumbar plexus; supplies the anterior thigh muscles. (L2, L3, L4)
Obturator: Supplies muscles in the medial compartment of the thigh. (L2, L3, L4)

Important Nerves - Detailed Information

Femoral Nerve:
- Root value: L2, L3, L4
- Largest branch of the lumbar plexus.
- Enters the thigh behind the inguinal ligament.
- Main nerve of the anterior compartment of the thigh.
Obturator Nerve:
- Root value: L2, L3, L4
- Passes through the obturator foramen into the thigh.
- Main nerve of the medial (adductor) compartment of the thigh.
Lateral cutaneous nerve of the thigh:
- Root value: L2, L3
- Enters the thigh under the lateral end of the inguinal ligament.
- Supplies the skin of the anterior and lateral surfaces of the thigh.

Test your knowledge on the lumbar plexus, an essential part of the nervous system that supplies the lower limb. This quiz covers its branches, functions, and the major nerves involved. Perfect for students studying anatomy and physiology!