what do the peroneus muscles do?

Answer 1

http://en.wikipedia.org/wiki/Peroneus_longus_muscle

Answer 2

The muscle peroneus longus (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.

[edit]
Details from Gray's anatomy
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.

Answer 3

A group of three muscle essentially wrapped around the fibula. They are used to stabilize the ankle, dorsiflex, evert, plantarflex, and abduct the foot.
See links below with photos and much more detail.
http://www.rad.washington.edu/atlas2/peroneuslongus.html
http://www.rad.washington.edu/atlas2/peroneusbrevis.html
http://www.rad.washington.edu/atlas2/peroneustertius.html

Answer 4

leg muscle

http://www.jdenuno.com/6~Muscles.htm

Answer 5

DON'T KNOW !! :)