VH Dissector: Lower Limb: Anterior & Lateral Leg
VH Dissector: Lower Limb: Anterior & Lateral Leg
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Nerves and Vessels of the Anterior Compartment
Nerves and Vessels of the Anterior Compartment
Anterior compartment is located anterior to the interosseous membrane between the lateral surface of the tibia and anterior crural intermuscular septum.
It contains the dorsiflexors of the ankle and extensors of the toes.
Add the Anterior Tibial artery which comes off the common tibial artery from the popliteal artery. The anterior tibal artery passes between two heads of the posterior tibialis muscule on the interosseus membrane. The artery pierces the membrane then lies on its anterior surface, deep to the Extensor Digitorum Longus. The anterior tibial artery terminates at the inferior extensor retinaculum as it becomes the dorsalis pedis artery.
Add the Anterior Tibial veins which is a paired system paralleling the anterior tibial artery. .
Add the Common Fibular Nerve (Peroneal) which comes around the head of the fibula to enter the lateral compartment of the leg. While in the fibularis (peroneus) longus muscle, the common fibular nerve will split into the superficial and deep branches.
Add the Deep Fibular Nerve (Peroneal) which innervates all the muscles of the anterior compartment.
The deep branch travels out of the lateral compartment and enters the EDL in the anterior compartment.
It descends through the anterior compartment on the interosseous membrane and will supply all four anterior compartment muscles and the EDB and EHL on the dorsum of the foot.
The deep peroneal nerve's sensory portion exists in the first web space of the dorsum of the foot.
The Superficial Fibular Nerve is not identified in this cadaver.
Muscles of the Anterior Compartment
Muscles of the Anterior Compartment
Anterior compartment is located anterior to the interosseous membrane between the lateral surface of the tibia and anterior crural intermuscular septum.
It contains the dorsiflexors of the ankle and extensors of the toes.
Add the Fibularis (peroneus) Tertius muscle. This is included in this cadaver but is visualized together with the fibularis (peroneus) group. The fibularis group is part of the Lateral Compartment and will be visualized as part of the lateral compartment.
Lateral Compartment of the Leg
Lateral Compartment of the Leg
The lateral compartment is bounded by the lateral surface of the fibula, anterior and posterior crural intermuscular septa, and crural fascia. It contains two muscles, one nerve and receives its blood supply from perforating branches of the fibular artery in the deep posterior compartment.
The tendons of the two muscles are held in place by the superior and inferior fibular retinaculum (extensions of the crural fascia).
The muscles are everters and plantar flexors of the ankle.
The Arterial Supply comes from perforating branches off the fibular artery (a branch off the posterior tibial artery in the posterior compartment). No vessel travels through the lateral compartment.
The Nerve Supply comes from the superficial branch of the fibular nerve (NOT IDENTIFIED IN THIS CADAVER) which lies within the muscle of fibularis longus and then travels down the compartment and innervates fibularis longus and brevis. The sensory portion of this nerve lies on the lateral and dorsal surface of the foot.
Add the Fibularis (Peroneal) Muscle Group.
This group of muscles includes the following components:
Credits:
Credits:
VH Dissector steps modified for Drexel Dissector by Dr. Haviva Goldman and Ms. Sophie Geagan (M.D. Student) from original website activity created by Jeffrey Fahl, MD, Kyle Petersen, PhD, Richard Drake, PhD, Alesha Petitt, MA, Claira Ralston, MS and Kim Price, MA and modified by Jeffrey Fahl, MD, Michael Smith, PhD, Albany Medical College.
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