Peroneus longus

(Redirected from Fibularis longus)
Jump to navigation Jump to search

Template:Infobox Muscle

WikiDoc Resources for Peroneus longus


Most recent articles on Peroneus longus

Most cited articles on Peroneus longus

Review articles on Peroneus longus

Articles on Peroneus longus in N Eng J Med, Lancet, BMJ


Powerpoint slides on Peroneus longus

Images of Peroneus longus

Photos of Peroneus longus

Podcasts & MP3s on Peroneus longus

Videos on Peroneus longus

Evidence Based Medicine

Cochrane Collaboration on Peroneus longus

Bandolier on Peroneus longus

TRIP on Peroneus longus

Clinical Trials

Ongoing Trials on Peroneus longus at Clinical

Trial results on Peroneus longus

Clinical Trials on Peroneus longus at Google

Guidelines / Policies / Govt

US National Guidelines Clearinghouse on Peroneus longus

NICE Guidance on Peroneus longus


FDA on Peroneus longus

CDC on Peroneus longus


Books on Peroneus longus


Peroneus longus in the news

Be alerted to news on Peroneus longus

News trends on Peroneus longus


Blogs on Peroneus longus


Definitions of Peroneus longus

Patient Resources / Community

Patient resources on Peroneus longus

Discussion groups on Peroneus longus

Patient Handouts on Peroneus longus

Directions to Hospitals Treating Peroneus longus

Risk calculators and risk factors for Peroneus longus

Healthcare Provider Resources

Symptoms of Peroneus longus

Causes & Risk Factors for Peroneus longus

Diagnostic studies for Peroneus longus

Treatment of Peroneus longus

Continuing Medical Education (CME)

CME Programs on Peroneus longus


Peroneus longus en Espanol

Peroneus longus en Francais


Peroneus longus in the Marketplace

Patents on Peroneus longus

Experimental / Informatics

List of terms related to Peroneus longus


In human anatomy, the peroneus longus (also known as fibularis longus) is a superficial muscle in the lateral compartment of the leg, and acts to evert and plantar flex the ankle.

It is situated at the upper part of the lateral side of the leg, and is the most superficial of the three peroneus muscles.

It is innervated by the superficial fibular nerve (superficial peroneal nerve).


The terms Peroneus (i.e., Longus and Brevis) and Peroneal (i.e., Artery, Retinaculum) are derived from the Greek word Perone (pronounced Pair-uh-knee) meaning pin of a brooch or a buckle. In medical terminology, both terms refer to being of or relating to the fibula or to the outer portion of the leg.

Origin and insertion

It is attached proximally to the head of the fibula and its 'belly' runs down most of this bone. It becomes a tendon that goes posteriorly around the lateral malleolus of the ankle, then continues under the foot to attach to the 1st metatarsal.

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; 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 peroneus 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 medial 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.


The Peronæi longus and brevis extend the foot upon the leg, in conjunction with the Tibialis posterior, antagonizing the Tibialis anterior and Peronæus tertius, which are flexors of the foot.

The Peronæus longus also everts the sole of the foot, and from the oblique direction of the tendon across the sole of the foot is an important agent in the maintenance of the transverse arch.

Taking their fixed points below, the Peronæi serve to steady the leg upon the foot.

This is especially the case in standing upon one leg, when the tendency of the superincumbent weight is to throw the leg medialward; the Peronæus longus overcomes this tendency by drawing on the lateral side of the leg.

Additional images

See also

External links

Template:Gray's Template:Muscles of lower limb