Podcast
Questions and Answers
Which branch of the lumbar plexus is primarily responsible for supplying the anterior compartment of the thigh?
Which branch of the lumbar plexus is primarily responsible for supplying the anterior compartment of the thigh?
- Obturator Nerve
- Femoral Nerve (correct)
- Lateral femoral cutaneous nerve
- Genitofemoral Nerve
What are the root values for the Obturator Nerve?
What are the root values for the Obturator Nerve?
- L2 L3
- L2 L3 L4 (correct)
- L1 L2 L3
- L1 L3 L4
Which of the following nerves is associated with supplying the genitals?
Which of the following nerves is associated with supplying the genitals?
- Iliohypogastric Nerve
- Genitofemoral Nerve (correct)
- Femoral Nerve
- Lateral cutaneous nerve of the thigh
Which of these nerves is most directly involved in the innervation of the medial compartment of the thigh?
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?
Which nerve enters the thigh behind the inguinal ligament?
What is a predominant function of the Iliohypogastric Nerve?
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?
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?
How many major branches are formed by the lumbar plexus?
Flashcards
What is the Lumbar Plexus?
What is the Lumbar Plexus?
The Lumbar plexus is a major nerve network responsible for supplying the lower limb, originating from the upper four lumbar nerves and forming six primary branches.
First 3 Nerves of the Lumbar Plexus - Importance?
First 3 Nerves of the Lumbar Plexus - Importance?
The iliohypogastric, ilioinguinal, and genitofemoral nerves primarily focus on supplying the abdominal wall and genitals.
Femoral Nerve
Femoral Nerve
The Femoral nerve, rooted in L2-L4, is the largest branch of the Lumbar plexus and is responsible for innervating the anterior compartment of the thigh, enabling flexion and extension.
Obturator Nerve
Obturator Nerve
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Lateral Cutaneous Nerve of the Thigh
Lateral Cutaneous Nerve of the Thigh
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Relation of the Lumbar Plexus to Lumbosacral Plexus?
Relation of the Lumbar Plexus to Lumbosacral Plexus?
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Function of the Lumbar Plexus?
Function of the Lumbar Plexus?
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What is the importance of the Lumbar Plexus branches?
What is the importance of the Lumbar Plexus branches?
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Study Notes
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.
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