Deep fibular nerve
Encyclopedia
The deep fibular nerve begins at the bifurcation of the common fibular nerve
, between the fibula and upper part of the fibularis (peronæus) longus
, passes infero-medially, deep to extensor digitorum longus, to the anterior surface of the interosseous membrane
, and comes into relation with the anterior tibial artery
above the middle of the leg; it then descends with the artery to the front of the ankle-joint, where it divides into a lateral
and a medial terminal branch
.
It lies at first on the lateral side of the anterior tibial artery
, then in front of it, and again on its lateral side at the ankle-joint.
In the leg, the deep fibular nerve supplies muscular branches to the tibialis anterior, extensor digitorum longus, fibularis (peronæus) tertius
, and extensor hallucis longus (propius), and an articular branch to the ankle-joint. After its bifurcation past the ankle joint, the lateral branch of the deep fibular nerve innervates the extensor digitorum brevis and the extensor hallucis brevis, while the medial branch goes on to provide cutaneous innervation to the webbing between the first and second digits.
Damage to the deep fibular nerve, as is possible with traumatic injury to the lateral knee, results in foot 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 peroneal 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.http://emedicine.medscape.com/article/1141734-overview
Common fibular nerve
The common fibular nerve , about one-half the size of the tibial nerve, is derived from the dorsal branches of the fourth and fifth lumbar and the first and second sacral nerves.It descends obliquely along the lateral side of the popliteal fossa to the head of the fibula,...
, between the fibula and upper part of the fibularis (peronæus) longus
Fibularis longus
In human anatomy, the peroneus longus is a superficial muscle in the lateral compartment of the leg, and acts to evert and plantar flex the ankle....
, passes infero-medially, deep to extensor digitorum longus, to the anterior surface of the interosseous membrane
Interosseous membrane
An interosseous membrane is a broad and thin plane of fibrous tissue that separates many of the bones of the body. It is an important component of many joints.Interosseous membranes in the human body:* Interosseous membrane of the forearm...
, and comes into relation with the anterior tibial artery
Anterior tibial artery
The anterior tibial artery of the lower limb carries blood to the anterior compartment of the leg and dorsal surface of the foot, from the popliteal artery.It is accompanied by a deep vein, the anterior tibial vein, along its course....
above the middle of the leg; it then descends with the artery to the front of the ankle-joint, where it divides into a lateral
Lateral terminal branch of deep fibular nerve
The lateral terminal branch passes across the tarsus, beneath the extensor digitorum brevis, and, having become enlarged like the dorsal interosseous nerve at the ankle, supplies the extensor digitorum brevis....
and a medial terminal branch
Medial terminal branch of deep fibular nerve
The medial terminal branch accompanies the dorsalis pedis artery along the dorsum of the foot, and, at the first interosseous space, divides into two dorsal digital nerves The medial terminal branch (internal branch) accompanies the dorsalis pedis artery along the dorsum of the foot, and, at the...
.
It lies at first on the lateral side of the anterior tibial artery
Anterior tibial artery
The anterior tibial artery of the lower limb carries blood to the anterior compartment of the leg and dorsal surface of the foot, from the popliteal artery.It is accompanied by a deep vein, the anterior tibial vein, along its course....
, then in front of it, and again on its lateral side at the ankle-joint.
In the leg, the deep fibular nerve supplies muscular branches to the tibialis anterior, extensor digitorum longus, fibularis (peronæus) tertius
Fibularis tertius
The peroneus tertius is a muscle of the human body located in the lower limb.The muscle arises from the lower third of the anterior surface of the fibula; from the lower part of the interosseous membrane; and from an intermuscular septum between it and the peroneus brevis muscle...
, and extensor hallucis longus (propius), and an articular branch to the ankle-joint. After its bifurcation past the ankle joint, the lateral branch of the deep fibular nerve innervates the extensor digitorum brevis and the extensor hallucis brevis, while the medial branch goes on to provide cutaneous innervation to the webbing between the first and second digits.
Damage to the deep fibular nerve, as is possible with traumatic injury to the lateral knee, results in foot drop
Foot drop
Foot drop is the dropping of the forefoot due to weakness, damage to the peroneal nerve or paralysis of the muscles in the anterior portion of the lower leg. It is usually a symptom of a greater problem, not a disease in itself. It is characterized by the inability or difficulty in moving the ankle...
. 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 peroneal 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.http://emedicine.medscape.com/article/1141734-overview