Lateral sural cutaneous nerve

The lateral sural cutaneous nerve of the lumbosacral plexus supplies the skin on the posterior and lateral surfaces of the leg. The lateral sural cutaneous nerve originates from the common fibular nerve(L4-S2) and is the terminal branch of the common fibular nerve.

Lateral sural cutaneous nerve
Cutaneous nerves of the right lower extremity. Front and posterior views. Lateral sural cutaneous nerve is not labeled. (Com. peroneal labeled in blue at center left and center right.)
Dissection of popliteal space to show the formation of a type 1 sural nerve
Details
From	common peroneal nerve
To	cutaneous innervation of the lateral calf
Identifiers
Latin	nervus cutaneus surae lateralis
TA98	A14.2.07.048
TA2	6572
FMA	44697
Anatomical terms of neuroanatomy

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

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."

Additional images

• 
  Most common formation (type 1) of the sural nerve depicted in the popliteal fossa
• 
  Most common formation of the sural nerve by Steele et al.
• 
  8 documented types of sural nerve formation
• 
  Areas of skin sensation supplied by nerves in the leg.
• 
  Areas of skin supplied by nerves of the leg - the sural nerve supplies the lateral ankle.
• 
  Deep nerves of the front of the leg.
• 
  Course of nerves at the bottom of the foot.

References

This article incorporates text in the public domain from page 964 of the 20th edition of Gray's Anatomy (1918)

External links

Referenced papers:

• Steele et al. 208 sample cadaveric review 2021
• Ramakrishnan et al.systematic review on sural nerve formation 2015

Anatomy web references

• Anatomy photo:11:07-0202 at the SUNY Downstate Medical Center
• Sural nerve at the Duke University Health System's Orthopedics program
• Cutaneous field