Fibula

Fibula: Anatomy & FunctionKey facts about the anatomy of the fibula, also known as the calf bone
~ 3 min

Let us examine the structure of the fibula. It is one of the leg bones and is positioned laterally

Fibula
Fibula

It has three parts:

  • body (corpus fibulae/diaphysis)

Body (corpus fibulae/diaphysis)
Body (corpus fibulae/diaphysis)
  • proximal epiphysis (epiphysis proximalis)

    Proximal epiphysis (epiphysis proximalis)
    Proximal epiphysis (epiphysis proximalis)
  • distal epiphysis (epiphysis distalis)

    Distal epiphysis (epiphysis distalis)
    Distal epiphysis (epiphysis distalis)

    Between the proximal epiphysis and the body lies the neck of the fibula (collum fibulae).

    Neck of the fibula (collum fibulae)
    Neck of the fibula (collum fibulae)

    We also distinguish between three surfaces (they are best seen around the body of the bone):

  • posterior surface (facies posterior)

    Posterior surface (facies posterior)
    Posterior surface (facies posterior)
  • medial surface (facies medialis)

    Medial surface (facies medialis)
    Medial surface (facies medialis)
  • lateral surface (facies lateralis)

    Lateral surface (facies lateralis)
    Lateral surface (facies lateralis)

    There are also three borders of the fibula (best seen in the area of the body of the bone):

  • anterior border (margo anterior)

    Anterior border (margo anterior)
    Anterior border (margo anterior)
  • posterior border (margo posterior)

    Posterior border (margo posterior)
    Posterior border (margo posterior)
  • interosseous border (margo interosseus)

Interosseous border (margo interosseus)
Interosseous border (margo interosseus)

On the proximal epiphysis lies the head of the fibulae (caput fibulae).

Head of the fibulae (caput fibulae)
Head of the fibulae (caput fibulae)

The head has an apex (apex capitis fibulae)

Apex (apex capitis fibulae)
Apex (apex capitis fibulae)

and an articular facet (facies articularis capitis fibulae) that connects to the tibia.

Articular facet (facies articularis capitis fibulae)
Articular facet (facies articularis capitis fibulae)

There is a medial crest (crista medialis) on the body of the bone.

Medial crest (crista medialis)
Medial crest (crista medialis)

From the distal epiphysis, the lateral malleolus (malleolus lateralis) is derived.

Lateral malleolus (malleolus lateralis)
Lateral malleolus (malleolus lateralis)

It has an articular facet (facies articularis malleoli) connecting to the talus.

Articular facet (facies articularis malleoli)
Articular facet (facies articularis malleoli)

There is also the malleolar fossa (fossa malleoli lateralis) at the back of the ankle

Malleolar fossa (fossa malleoli lateralis)
Malleolar fossa (fossa malleoli lateralis)

Slightly in front lies the malleolar groove (sulcus malleolaris), in which the tendon of the fibularis longus muscle passes.

Malleolar groove (sulcus malleolaris) fibula
Malleolar groove (sulcus malleolaris) fibula
Dictionary

Fibula (calf bone)

fibula
fibula
body of fibula
corpus fibulae/diaphysis
proximal epiphysis
epiphysis proximalis
distal epiphysis
epiphysis distalis
neck of fibula
collum fibulae
posterior surface
facies posterior
medial surface
facies medialis
lateral surface
facies lateralis
anterior border
margo anterior
posterior border
margo posterior
interosseous border
margo interosseus
head of fibula
caput fibulae
apex of head of fibula
apex capitis fibulae
articular facetof head of fibula
facies articulariscapitis fibulae
medial crest
crista medialis
lateral malleolus
malleolus lateralis
articular facet of malleolus
facies articularis malleoli
malleolar fossa
fossa malleoli lateralis
malleolar groove
sulcus malleolaris
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