Anatomy study note · Lower limb

Common fibular nerve

The smaller terminal branch of the sciatic nerve. It winds round the neck of the fibula, where it is subcutaneous and easily injured.

Key points

• Smaller sciatic branch; winds round the fibular neck.
• → superficial (lateral compartment) + deep (anterior compartment) fibular nerves.
• Fibular neck injury → footdrop.
• Upper limb nerves: C4–T2 segments; lower limb: L2–S2.
• Ventral root: basal-lamina neurons. Dorsal root: neural-crest ganglion cells.
• Nerve: epineurium → perineurium (blood–nerve barrier) → endoneurium.
• Cut nerve: Wallerian degeneration; regrows 0.5–3 mm/day.

The full note in the atlas also covers

Course · Branches · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 11, PDF pp. 1337–1338
• Inderbir Singh’s Human Embryology, ch. 17, PDF pp. 318, 321, 323–325; ch. 10, PDF pp. 143–144
• BRS Cell Biology & Histology, 7th ed., ch. 9, PDF pp. 163–166, 171–172

More from the lower limb

• Cruciate ligaments
• Deep fibular nerve
• Deep veins of the leg and foot
• Dorsalis pedis artery
• Extensor digitorum brevis
• Extensor digitorum longus
• Extensor hallucis longus
• Femoral artery
• Femoral nerve
• Femoral vein
• Femur
• Fibula

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