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Anterior ligament of fibular head

The anterior ligament of the fibular head is a small but important stabilizing ligament of the proximal tibiofibular joint. It consists of short, strong fibers connecting the lateral condyle of the tibia to the anterior aspect of the head of the fibula. Despite being relatively short, it plays a crucial role in maintaining the stability of the tibiofibular articulation during leg movements, particularly rotational stresses.

It is clinically relevant in cases of proximal tibiofibular joint instability, trauma, and fibular head fractures.

Synonyms

  • Anterior superior tibiofibular ligament

  • Proximal anterior tibiofibular ligament

  • Fibular head anterior ligament

Origin and Insertion

  • Origin: Lateral condyle of the tibia (anterior surface)

  • Course: Fibers run obliquely downward and laterally across the front of the proximal tibiofibular joint

  • Insertion: Anterior aspect of the head of the fibula

Relations

  • Anteriorly: Subcutaneous tissue and skin of the lateral leg

  • Posteriorly: Proximal tibiofibular joint cavity and posterior ligament of fibular head

  • Superiorly: Lateral tibial condyle and insertion of biceps femoris tendon

  • Inferiorly: Upper fibers of the peroneus longus muscle and anterior compartment muscles

  • Medially: Lateral tibial condyle

  • Laterally: Fibular head prominence, palpable beneath the skin

Nerve Supply

  • Supplied by branches of the common peroneal (fibular) nerve

Arterial Supply

  • Branches of the inferior lateral genicular artery (from popliteal artery)

  • Contributions from the anterior tibial recurrent artery

Venous Drainage

  • Venous return via the inferior genicular veins into the popliteal vein

Function

  • Stabilizes the proximal tibiofibular joint

  • Prevents anterior displacement of the fibular head

  • Contributes to load transfer between tibia and fibula during ankle and knee motion

  • Assists in maintaining lateral knee stability

Clinical Significance

  • May be injured in proximal fibular fractures or ankle injuries

  • Involved in proximal tibiofibular joint dislocation or instability

  • Can cause lateral knee pain or mimic meniscal injury

  • Important landmark in surgical procedures around the knee and fibular head

MRI Appearance

T1-weighted images:

  • Ligament appears as a thin, low-signal band between tibia and fibula

  • Surrounded by bright fat planes that enhance visualization

T2-weighted images:

  • Ligament appears dark (low signal)

  • Injury or sprain shows focal bright hyperintensity or discontinuity

STIR (Short Tau Inversion Recovery):

  • Normal ligament remains dark

  • Sprains, tears, or inflammation appear as bright hyperintensity

Proton Density Fat-Saturated (PD FS):

  • Normal ligament: dark low signal

  • Pathology (strain, tear) shows focal or diffuse bright signal

T1 Fat-Sat Post-Contrast:

  • Normal ligament shows minimal or no enhancement

  • Pathology: enhancement at tear margins, periligamentous enhancement in inflammation

CT Appearance

Non-Contrast CT:

  • Ligament itself is not well visualized

  • May appear as a fine soft tissue density at anterior proximal tibiofibular joint

  • Calcification or ossification may be seen in chronic injury

Post-Contrast CT:

  • Ligament itself does not enhance significantly

  • Adjacent inflammatory or pathological processes may show enhancing soft tissue around the joint

MRI images

Anterior ligament of fibular head axial cross sectional anatomy 3T MRI AI enhanced radiology anatomy image-img-00000-00000

MRI images

Anterior ligament of fibular head SAGITTAL cross sectional anatomy 3T MRI AI enhanced radiology anatomy image-img-00000-00000

CT image

Anterior Ligament of Fibular Head CT SAG IMAGE