|
| |
|
| |
129
|
| |
486
|
| |
Gray1240png
|
| |
Lateral aspect of right leg
|
| |
Gray441png
|
| |
The mucous sheaths of the tendons around the ankle Lateral aspect (Peroneus longus labeled at lower left)
|
| |
Fibula
|
| |
first Metatarsal , medial Cuneiform
|
| |
|
| |
Peroneal Nerve
|
| |
|
The muscle (also known as '''fibularis longus''') is a superficial
Muscle in the
Human Leg , and acts to evert and plantar flex the ankle.
It is attached proximally to the head of the
Fibula and its 'belly' runs down most of this bone.
Peroneus longus becomes a tendon that goes posterially around the
Lateral Malleolus of the
Ankle , then continues under the foot to attach to the 1st
Metatarsal .
It is a muscle of the lateral
Compartment of the leg and is innervated by the
Superficial Peroneal Nerve .
The Peronæus longus is situated at the upper part of the lateral side of the leg, and is the more superficial of the two muscles.
It arises from the head and upper two-thirds of the lateral surface of the body of the fibula, from the deep surface of the fascia, and from the intermuscular septa between it and the muscles on the front and back of the leg; occasionally also by a few fibers from the
Lateral Condyle of the
Tibia . Between its attachments to the head and to the body of the fibula there is a gap through which the common peroneal nerve passes to the front of the leg.
It ends in a long tendon, which runs behind the
Lateral Malleolus , in a groove common to it and the tendon of the
Peronæus Brevis , behind which it lies; the groove is converted into a canal by the superior peroneal retinaculum, and the tendons in it are contained in a common mucous sheath.
The tendon then extends obliquely forward across the lateral side of the calcaneus, below the
Trochlear Process , and the tendon of the
Peronæus Brevis , and under cover of the
Inferior Peroneal Retinaculum .
It crosses the lateral side of the
Cuboid , and then runs on the under surface of that bone in a groove which is converted into a canal by the
Long Plantar Ligament ; the tendon then crosses the sole of the foot obliquely, and is inserted into the lateral side of the base of the first
Metatarsal Bone and the lateral side of the first
Cuneiform .
Occasionally it sends a slip to the base of the second
Metatarsal bone.
The tendon changes its direction at two points: first, behind the lateral malleolus; secondly, on the cuboid bone; in both of these situations the tendon is thickened, and, in the latter, a sesamoid fibrocartilage (sometimes a bone), is usually developed in its substance.
