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Dorsal talonavicular ligament

The dorsal talonavicular ligament is a thin yet strong fibrous band located on the dorsum of the foot. It spans from the dorsal surface of the talar head to the dorsal aspect of the navicular bone, forming the dorsal reinforcement of the talonavicular joint capsule.

Although relatively small, it plays a key role in stabilizing the talonavicular joint, which is crucial for midfoot mobility and weight-bearing balance. This ligament is most often involved in midfoot sprains, trauma, and degenerative joint disease.

Synonyms

  • Superior talonavicular ligament

  • Dorsal ligament of the talonavicular joint

Origin, Course, and Insertion

  • Origin: Dorsal surface of the head of the talus

  • Course: Runs anteriorly and medially across the dorsum of the foot

  • Insertion: Dorsal aspect of the navicular bone

Relations

  • Superiorly: Extensor tendons of the foot, including extensor hallucis longus and extensor digitorum longus

  • Inferiorly: Talonavicular joint capsule and plantar calcaneonavicular (spring) ligament

  • Anteriorly: Navicular bone and capsule of the talonavicular joint

  • Posteriorly: Talar head and anterior aspect of the ankle joint

  • Laterally/Medially: Continuous with fibers of the joint capsule and adjacent dorsal cuneonavicular ligaments

Function

  • Joint stabilization: Reinforces the dorsal aspect of the talonavicular joint capsule

  • Foot biomechanics: Supports medial longitudinal arch indirectly by maintaining joint congruency

  • Motion control: Restricts excessive dorsal displacement of the navicular on the talus

  • Load bearing: Contributes to stability during walking, running, and pivoting

Clinical Significance

  • Midfoot sprains: Injuries often occur with inversion or twisting trauma

  • Degeneration: Involved in talonavicular arthritis or chronic instability

  • Associated injuries: May be damaged with talonavicular fractures or dislocations

  • Symptoms: Dorsal midfoot pain, swelling, tenderness, and reduced range of motion

  • Surgical relevance: Repair may be necessary in cases of severe instability or reconstructive procedures

MRI Appearance

  • T1-weighted images:

    • Ligament appears as a low signal (dark) thin band connecting talus to navicular

    • Normal surrounding fat planes are bright and outline the ligament

    • Disruption or thickening suggests injury

  • T2-weighted images:

    • Normal ligament: low signal (dark), thinner than adjacent capsule

    • Partial tear: intermediate to bright hyperintense signal within ligament fibers

    • Complete tear: discontinuity with surrounding joint effusion or edema

  • STIR:

    • Normal: uniformly dark band

    • Injury: bright hyperintense signal indicating edema or fiber disruption

  • Proton Density Fat-Saturated (PD FS):

    • Normal: dark homogeneous band

    • Pathology: bright signal within or around ligament consistent with sprain, partial tear, or synovitis

  • T1 Fat-Sat Post-Contrast:

    • Normal ligament: minimal or no enhancement

    • Injured ligament or inflamed capsule: contrast enhancement, particularly in chronic cases or synovitis

CT Appearance

Non-Contrast CT:

  • Ligament poorly visualized due to soft-tissue density

  • Indirect findings: joint malalignment, talonavicular subluxation, or fracture fragments near its attachment

Post-Contrast CT (standard):

  • Capsule and surrounding soft tissues may enhance if inflamed

  • Direct ligament visualization limited compared to MRI

MRI image

Dorsal talonavicular ligament coronal cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000

MRI image

Dorsal talonavicular ligament coronal cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000_00001

MRI image

Dorsal talonavicular ligament sag cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000_00002