Lateral sural cutaneous nerve
Sensory nerve of the leg that supplies part of the posterolateral side of the leg
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Through Ankle
Sural communicating branch
One branch, the sural communicating nerve or colloquially known as the peroneal anastomotic (n. communicans fibularis), arises from sciatic origins near the head of the fibula, crosses the lateral head of the gastrocnemius to the middle of the leg, and joins with the medial sural cutaneous nerve to form the sural nerve
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Variation
Another branch observed, that is mentioned in passing in previous literature is the medial branch of the lateral sural cutaneous nerve.
In a 2021 study by Steele et al. (Annals of Anatomy), a medial branch of the lateral sural cutaneous nerve was observed in approximately 36% of lower extremities dissected (n=208) with an average diameter of 1.47 ± 0.655 mm with a 95% CI of 1.31 – 1.625 mm. This branch was noted to travel in a subcutaneous plane over the sural nerve to the posteromedial aspect of the ankle. "The lateral branch of the LSCN traveled the expected course over the fibula in the superficial fascia of the posterolateral compartment of the leg, while the medial branch terminates into the lower posteromedial aspect of ankle."