Lateral Compartment of the Leg Flashcards
The lateral compartment of the leg is border by …. and contains 2 muscles 1 nerve
- anterior and posterior intermuscular septum - lateral border of the fibula - Superficial PERONEAL nerve - Fibular longus - Fibular brevis
Since there is no main vascular branches for the lateral compartment of the leg, how do this leg region receive its vascular supply?
Arterial supply from perforating branches of Anterior Tibial and Peroneal Arteries
The main nerve supply of the lateral compartment of the leg
Muscles and skin?
The superficial fibular nerve is the only nerve running through the lateral compartment
L5, S1, S2
This nerve supply the fibular muscles and most of the skin on the dorsum of the foot
Actions of the PERONEUS LONGUS AND BREVIS
eversion at the ankle and even plantar flexion because it inserts into the sole of the foot it plays an important role to maintain the medial arch of the foot in contact with the ground during locomotion Functionally, these muscles helps to stabilize the ankle during locomotion. Prevents ankle inversion injuries
How does the peroneus longs and brevis prevent ankle injuries
They help keep the medial border of the foot fixed on the ground during locomotion if caught off guard, the ankle can roll inwards, resulting in a sprain ankle
Peroneus Longus Origin and Insertion Action
O: shaft of the fibular its tendon runs downward around the lateral malleolus to travel medially to the sole of the foot to insert into the base of the medial CUNIFORM and the base of the 1st METATARSAL. Superficial peroneal nerve L5, S1, S2
Peroneus Brevis Origin, Insertion, Action
O: laterally 2/3 of the fibula and runs behind the lateral malleolus, posterior to the peroneus longus to insert into the base of the 5th metatarsal. Action is to evert the foot and keep the lower leg over the foot when standing on one leg.
What is the purpose of the synovial sheath?
To reduce friction of the tendons as the past through and to improve gliding of the tendons as they pass through ligaments or osseous fibrous tunnels
Superficial PERONEUS nerve Course and branches and supply
originate from the common fibular nerve at the head of the fibula - and descend vertically down the lateral compartment of the leg … - traveling superficially to the extensor digitorum muscle in the leg where it becomes cutaneous only… and then - it splits into two branches above the superior extensor retinaculum - supply the skin of the anterior leg to most of the foot…. (not the patch of skin between the 1st and 2nd toe)
The superficial peroneus nerve does not supply the?
web space between the 1st and 2nd toe
The lateral compartment of the thigh receives its arterial supply from?
The perforating branches of anterior tibial and perineal arteries
Arterial supply?
receive their blood supply from the perforating arteries of the anterior tibial and fibular arteries
