Podcast
Questions and Answers
Which of the following branches of the Lumbar plexus primarily supplies the abdominal wall?
Which of the following branches of the Lumbar plexus primarily supplies the abdominal wall?
- Obturator nerve
- Iliohypogastric nerve (correct)
- Femoral nerve
- Lateral femoral cutaneous nerve
What is the root value of the Femoral nerve?
What is the root value of the Femoral nerve?
- L1 L2 L3
- L2 L3
- L1 L2
- L2 L3 L4 (correct)
Which nerve passes through the obturator foramen to supply the medial compartment of the thigh?
Which nerve passes through the obturator foramen to supply the medial compartment of the thigh?
- Genitofemoral nerve
- Lateral cutaneous nerve
- Obturator nerve (correct)
- Ilioinguinal nerve
The Lateral femoral cutaneous nerve supplies which areas of the body?
The Lateral femoral cutaneous nerve supplies which areas of the body?
Which of the following nerves is considered the largest branch of the Lumbar plexus?
Which of the following nerves is considered the largest branch of the Lumbar plexus?
Which nerve has a root value of L1 and provides cutaneous sensation to the upper medial thigh?
Which nerve has a root value of L1 and provides cutaneous sensation to the upper medial thigh?
What is the primary function of the Genitofemoral nerve?
What is the primary function of the Genitofemoral nerve?
Which of the following nerves primarily innervates the skin of the anterior surface of the thigh?
Which of the following nerves primarily innervates the skin of the anterior surface of the thigh?
Flashcards
What is the Lumbar Plexus?
What is the Lumbar Plexus?
A major nerve pathway supplying the lower limb, primarily the anterior thigh muscles. It's formed by the upper four lumbar nerves.
What is the Femoral Nerve?
What is the Femoral Nerve?
One of the six major branches of the Lumbar Plexus, this nerve is crucial for controlling the muscles of the anterior thigh, allowing for leg extension and movement.
What is the Obturator Nerve?
What is the Obturator Nerve?
This nerve controls the adductor muscles of the medial thigh, allowing for movements like bringing your legs together.
What is the Lateral Femoral Cutaneous Nerve?
What is the Lateral Femoral Cutaneous Nerve?
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What is the Genitofemoral Nerve?
What is the Genitofemoral Nerve?
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What is the Iliohypogastric Nerve?
What is the Iliohypogastric Nerve?
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What is the Ilioinguinal Nerve?
What is the Ilioinguinal Nerve?
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Is there a 'Lumbar Nerve' in the Lumbar Plexus?
Is there a 'Lumbar Nerve' in the Lumbar Plexus?
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Study Notes
The Lumbar Plexus
- Part of the larger lumbosacral plexus
- One of the main pathways supplying the lower limb
- Formed from the upper 4 lumbar nerves
- Gives off 6 major branches
6 Major Branches of the Lumbar Plexus
- Iliohypogastric (L1)
- Ilioinguinal (L1)
- Genitofemoral (L1, L2)
- Lateral femoral cutaneous nerve (L2, L3)
- Femoral (L2, L3, L4)
- Obturator (L2, L3, L4)
First 3 Nerves (to ignore for now)
- Iliohypogastric & Ilioinguinal mainly supply muscles and skin of the abdominal wall
- Ilioinguinal has a cutaneous branch over the upper medial part of the thigh.
- Iliohypogastric has a cutaneous branch over the buttock.
- Genitofemoral mainly supplies the genitals and has a cutaneous branch over the anterior surface.
Important Nerves - No. 1: 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
Important Nerves - No. 2: 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
Important Nerves - No. 3: Lateral Cutaneous Nerve of the Thigh
- Root value: L2, L3
- Enters the thigh under the lateral end of the inguinal ligament
- Supplies skin of anterior and lateral surfaces of the thigh
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