Deep fibular (peroneal) nerve
Nerves of the right lower extremity, anterior view.
Details
From	Common peroneal nerve
Innervates	Anterior compartment of leg
Identifiers
Latin	nervus fibularis profundus, nervus peroneus profundus
TA98	A14.2.07.055
TA2	6579
FMA	44771
Anatomical terms of neuroanatomy [edit on Wikidata]

Thedeep fibular nerve (also known asdeep peroneal nerve) begins at the bifurcation of thecommon fibular nerve between thefibula and upper part of thefibularis longus, passes infero-medially, deep to theextensor digitorum longus, to the anterior surface of theinterosseous membrane, and comes into relation with theanterior tibial artery above the middle of the leg; it then descends with the artery to the front of theankle-joint, where it divides into alateral and amedial terminal branch.

The deep fibular nerve is the nerve of the anterior compartment of the leg and the dorsum of the foot. It is one of the terminal branches of thecommon fibular nerve. It corresponds to theposterior interosseus nerve of the forearm. It begins at the lateral side of the fibula bone, and then enters the anterior compartment by piercing the anterior intermuscular septum. It then pierces theextensor digitorum longus and lies next to theanterior tibial artery, following the course of the artery until theankle-joint where the nerve divides into medial and lateral terminal branches. In the leg, the deep fibular nerve divides into several branches:^[1]

• Muscular branches: Supplies four muscles in the leg:tibialis anterior,extensor hallucis longus,extensor digitorum longus, andfibularis tertius^[1]

Close to the ankle joint, the deep fibular nerve terminates by dividing into medial and lateral terminal branches.^[1]

• Medial terminal branch: This nerve accompanies thedorsalis pedis artery along the dorsum of the foot, and, at the first interosseous space, divides into twodorsal digital nerves which supply the adjacent sides of the great and second toes,^[1] communicating with themedial dorsal cutaneous branch of the superficial fibular nerve. Before it divides it gives off to the first space an interosseous branch which supplies themetatarsophalangeal joint of the great toe and sends a filament to the firstInterosseous dorsalis muscle.^[2]
• Lateral terminal branch - This nerve passes across thetarsus, beneath theextensor digitorum brevis, supplying latter. This nerve ends in a pseudoganglion deep to the extensor digitorum brevis.^[1] From the pseudoganglion, three minute branches are given off to supply thetarsal joints and themetatarsophalangeal joints of the second, third, and fourth toes.^[2]

In the leg, the deep fibular nerve supplies muscular branches to the anterior compartment of extensor muscles in the leg which include thetibialis anterior,extensor digitorum longus,fibularis tertius, andextensor hallucis longus (propius), and an articular branch to theankle-joint. After its bifurcation past the ankle joint, the lateral branch of the deep fibular nerve innervates theextensor digitorum brevis and theextensor hallucis brevis, while the medial branch goes on to provide cutaneous innervation to the webbing between the first and second toes.

Damage to the deep fibular nerve, as is possible with traumatic injury to the lateral knee, results infoot drop. The deep fibular nerve is also subject to injury resulting from lower motor neuron disease, diabetes, ischemia, and infectious or inflammatory conditions. Injury to the common fibular nerve is the most common isolated mononeuropathy of the lower extremity and produces sensory problems on the lateral lower leg in addition to foot drop.^[3]

• 
  Cross-section through middle of leg.
• 
  Cutaneous nerves of the right lower extremity, anterior and posterior views.
• 
  Cutaneous nerves of the right lower extremity, anterior and posterior views.
• 
  Deep nerves of the front of the leg.
• 
  Nerves of the dorsum of the foot.
• 
  Deep fibular nerve

This article incorporates text in thepublic domain frompage 965 of the 20th edition ofGray's Anatomy(1918)

• Anatomy photo:16:st-0601 at the SUNY Downstate Medical Center - "The Foot: Nerves"

• Wikipedia articles incorporating text from the 20th edition of Gray's Anatomy (1918)
• Nerves of the lower limb and lower torso

• Articles with short description
• Short description matches Wikidata