FEMORAL NERVE

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SUMMARY

1. Origin - L2, L3, L4 (posterior divisions of the anterior rami).2. Emerges from the lateral border of the psoas major and runs in the gutter b/w psoas & iliacus, deep to iliac fascia.
3. Supplies the iliacus, then passes under the inguinal ligament & lateral to femoral sheath (remember the mnemonic 'VAN').
4. Lateral femoral circumflex artery divides its branches (9-10) into SUPERFICIAL (4 => 2 cutaneous + 2 muscular) & DEEP (5-6 => 1 to each vastus [3 total] + 2 to rectus femoris + 1 cutaneous).
5. SUPERFICIAL BRANCHES - nerve to sartorius, nerve to pectineus, intermediate femoral cutaneous nerve, medial femoral cutaneous nerve.
6. DEEP BRANCHES - 2 nerves to rectus femoris (also supplies hip), nerve to vastus lateralis, nerve to vastus intermedius, nerve to vastus medialis (largest, carries most of branches to knee joint), saphenous nerve.
Gray827.png
Image: Gray, Henry. Anatomy of the Human Body. Philadelphia: Lea & Febiger, 1918; Bartleby.com, 2000. www.bartleby.com/107/ [Accessed 07 Apr. 2019].


Reference(s)

R.M.H McMinn (1998). Last’s anatomy: regional and applied. Edinburgh: Churchill Livingstone.
Gray, H., Carter, H.V. and Davidson, G. (2017). Gray’s anatomy. London: Arcturus.