Lower Extremity Nerve Entrapment

Interactive Clinical Anatomy · Lower Extremity

Follow the nerve. Localize the lesion.

Choose a nerve, trace it from the plexus to its terminal branches, then compare how sensory loss, motor loss, reflexes, provocation, and spared functions change at each entrapment level.

1 Choose a nerve pathway

Frequency note: the tabs move from commonly encountered pathways toward less common mononeuropathies, but a precise universal ranking is not defensible because incidence varies by population, activity, trauma, surgery, and diagnostic method. Within each nerve, levels are arranged proximal to distal—not by frequency. [1–4]

2 Trace the course

Common fibular nerve: proximal to distal

3 Select an entrapment level

Where is the nerve vulnerable?

Select a syndrome to reveal its localization pattern. Branch lesions appear after their parent nerve in the course.

4 Compare levels

Level-by-level differentiators

Use the entire pattern. No single provocative test or sensory boundary independently establishes the diagnosis.

Level	Sensory	Motor / reflex	What is spared?	Best differentiator

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