Fibula

The fibula , also called the fibula , is a bone constituting the side part of the skeleton of the leg. Articulated with the tibia at its two ends, with the Os astragale at its distal end (external Malleolus). In the current birds, the fibula is a fine osseous rod in the rammer.

It is a long, even, asymmetrical bone and hail. It presents a ventro-side torsion in its lower part. It forms the skeleton of the leg with the tibia; it is laterally behind this one. It is composed of a Diaphyse (bodies) and of two épiphyse S (ends).

The body (diaphyse)

It is triangular prismatic.

Three faces:

Posterior face

Insertion in its 1/3 superior of the Muscle soléaire (on the level of the collar). Insertion in its 2/3 inferiors of the Flexor of the hallux.

Side face

It is, in its upper part, excavated in gutter:
  • Insertion in front of the gutter of the long Muscle fibulaire former chief (peroneal ex-length).
  • Insertion with the back of the gutter of the long Muscle fibulaire posterior chief.
  • Insertion in its lower half of the short Muscle fibulaire (ex-court peroneal).

Face médiale

It is divided vertically into two fields by the interosseuse peak.

In front of the peak:

With the back of the peak:
  • Insertion of the posterior Muscle tibial (ex-leg posterior).
  • Lower part: insertion of the Muscle third fibulaire (ex-peroneal former). This mucle is inconstant has approximately 10%.

Three edges:

Former edge

It delimits the side face and the face médiale.

Side edge

  • It delimits the side face and the posterior face.
  • It is projecting, especially in its lower part.
  • Insertion in its upper part of the muscle soléaire.

Edge médial

It delimits the face médiale and the posterior face.

Higher end

It is composed of a collar on which the long muscle fibulaire comes to fit and of a bulky head, in the shape of lance:

Internal slope

It has an articular surface which answers the tibia. With the top and in lower part of this articular surface, insertion of the higher Ligaments tibiaux-fibulaire.

External slope

It gives insertion on its part more médiale to the external side Ligament. On its more large surface, laterally, with the insertion of, insertion of the biceps.

Apophysis styloïde

On its top, insertion of the ligament poplity arched.

Lower end (external malleolus)

It is longer, bulkier and goes down low than the internal malleolus (tibia). It presents two faces, two edges and a top:

Face médiale

  • It has a triangular articular surface (at top podal) encrusted cartilages.

This one will be articulated with the slope (ex-astragale).

  • In the lower part, presence of a small cavity in which the Ligament

fits talo-fibulaire posterior.

Side face

  • It is free of any insertion. It feels through the skin.

Former edge

  • It is convex forwards. It gives insertion:

    • In its 1/3 superior with the Ligament péronéo-tibial lower and former.
    • In its 1/3 means with the former Ligament péronéo-astragalien.
    • In its 1/3 lower (without reaching the top) than the Ligament péronéo-calcanéen.

Posterior edge

  • In the shape of gutter, it allows the passage of peroneal side.

Summit (apex)

  • Rounded, it is located laterally compared to the median axis of the fibula; it is free of any insertion.

Random links:Georges Balandier | Peridot | Pierre Bergé | 11th battalion of Alpine hunters | Splashes | Comté_d'Anderson,_Tennessee