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summary for the Femoral Nerve of Lumber plexus
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Femoral Nerve By: Huda Almubarak
Lumber Plexus
• Is formed inside Psaos Major with root value (L1, L2, L3, L4)
A. Femoral Nerve B. Obturator Nerve
Psaos Major
• Origin: side of (T2-L5)
vertebra and there’s discs.
• Insertion: lasser trochanter of femur
Psaos Major
• Innervations: Anterior rami of lumber nerve (L1, L2, L3)
• Action: Flexing + stabilizing hip joint
Femoral nerve- Arises from the lumbar plexus
- Descends within the groove between the psoasmajor and iliacusmuscles
- Lateral to the femoral artery as it enters the thigh
Femoral Nerve Supply the frontal area of the
thigh
Branch: A.Anterior cutaneus branch. B.Sapheneus nerve.
Anterior cutaneus branch.
Sensation of the skin of the anterior and median aspect of the thigh
Injury: loss of sensation and sympathetic
Sapheneus nerveSensation of the
skin of patella and median side of the leg and foot
Injury: loss of sensation and sympathetic
Sapheneus
The Dermatome of the leg
Femoral nerve injury
Paralysis: Quadriceps femoris muscle.
Deformity: Flexion of the knee Sensation + Sympathetic: loss of
sensation and sympathetic of skin of the anterior and median aspect of the thigh and the skin of patella and median side of the leg and foot
Femoral nerve entrapments
• Herniation of inter vertebral discs (L2/L3 or L3/L4)
• At the level of inguinal ligament (femoral nerve neuropathy)
This may result in:• Weak extension of the knee• Weak patellar tendon reflex (L4 level reflex)• Cutaneous sensory changes (anterior thigh &
L4 dermatome)