Sural Nerve
Original Editor - Rachael Lowe
Top Contributors - Rachael Lowe, Lucinda hampton, Jin Yoo and Poonam Sepat
Description[edit | edit source]
The sural cutaneous nerve consists of the fusion of the medial sural cutaneous nerve (MSCN) which is a terminal branch of the tibial nerve and the lateral sural cutaneous nerve (LSCN) which is one of the terminal branches of the common fibular nerve. These two branches, MSCN and LSCN, are connected by the sural communicating branch and form the sural nerve. How the two branches fuse, the contribution of the fibular and tibial branch, the location of the connection, and differences between the two lower extremities contribute to variability of this nerve.
From the mid calf down to the ankle the nerve courses subcutaneously along a line drawn from the mid-posterior popliteal fossa to just posterior to the lateral malleolus and thence under the malleolus and forward along the lateral aspect of the foot. It supplies sensation to the skin of the lateral foot and lateral lower ankle.
Function[edit | edit source]
The sural nerve is purley sensory and it supplies sensation to the lower lateral leg, lateral heel, ankle and doral lateral foot.
Clinical relevance[edit | edit source]
Damage to the sural nerve due to injury can occur as a result of trauma, fractured calcaneus, damage from surgery in the region. This injury may not cause significant deficit or disabiltiy due to overlap of other nerves.
As the sural nerve is purely sensory function dysfunction results in only a relatively trivial deficit. For this reason, it is often used for nerve biopsy, as well as the donor nerve for nerve grafts.
