Sural Nerve
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The sural nerve is formed by the union
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of two branches, the medial sural nerve
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from the tibial nerve and the lateral
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sural nerve from the peroneal nerve.
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The sural nerve proximally sits between,
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although we're a little more distal than this,
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but between the two heads of the gastrocnemius.
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Here we see it sitting just lateral to the
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Achilles and just behind and medial to the
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lesser saphenous vein and a branch thereof
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on both the T1 and the T2 weighted image.
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Now distally, as we follow the sural
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nerve down, and there it is, it's
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gonna branch into two components.
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The lateral dorsal cutaneous nerve,
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we're gonna see it branch in a moment.
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Here it is right here.
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It gets a little bit confusing because
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we've got saphenous, the lesser
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saphenous vein and its branches.
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So we're going to see a branch right there.
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The anterior branch is the lateral
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dorsal cutaneous nerve, and the posterior
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branch is the lateral calcaneal branch.
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And that is the one right there.
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We follow it right next to the calcaneus.
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It is often injured in a lateral
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approach to fixing a calcaneal fracture.
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This one or its cutaneous
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component can also be injured.
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When there is lesser saphenous vein stripping in
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somebody that has venous insufficiency syndrome.
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The sural nerve, a nerve that is injured
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iatrogenically, more common than it is from
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a traumatic event or from a mass or tumor.
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
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