Lateral Plantar Nerve Entrapment
From WikiMSK
| Lateral Plantar Nerve Entrapment |
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Anatomy
The posterior tibial nerve courses down the foot through the tarsal tunnel and ramifies into the lateral plantar nerve and medial plantar nerve. The lateral plantar nerve is the smaller of the two.
Aetiology
- Trauma/surgery: failed tarsal tunnel release, harvest of flexor hallucis longus tendon (but medial plantar nerve injury is more likely)
- Lesions: Neurilemmoma, pseudoganglion.
- Foot abnormalities: increased foot pronation, midtarsal joint laxity, forefoot varus, rear foot eversion, pes planus, cavovarus foot.
Epidemiology
It is less common than entrapment of its first branch, Baxter's nerve (inferior calcaneal nerve).
Clinical Features
LPN entrapment can occur along with entrapment of other local nerves and so the clinical picture can be tricky.
History
Patients have burning pain, paraesthesias, and numbness involving the lateral side of the sole and lateral toes. Symptoms are typically worse with weight-bearing activities and improve with rest. However symptoms can occur at rest.
Examination
Motor deficit is rare.
References
Literature Review
Literature Review
- Reviews from the last 7 years: review articles, free review articles, systematic reviews, meta-analyses, NCBI Bookshelf
- Articles from all years: PubMed search, Google Scholar search.
- TRIP Database: clinical publications about evidence-based medicine.
- Other Wikis: Radiopaedia, Wikipedia Search, Wikipedia I Feel Lucky, Orthobullets,
