calcaneofibular ligament(redirected from ligamentum calcaneofibulare)
the middle of the three fascicles that form the lateral ligament of the ankle joint, reinforcing the lateral side of the ankle joint and resisting excessive inversion of the foot; the remaining two ligaments of the lateral ligaments are the anterior and posterior talofibular ligaments.
Synonym(s): ligamentum calcaneofibulare [TA]
calcaneofibular ligamentThe narrow rounded middle fascicle of the 3-part lateral ankle ligament, which counters excess foot inversion. It courses from the apex of the fibular malleolus inferoposteriorly to a tubercle on the lateral calcaneus. Sprains cause 85% of ankle injuries, of which 85% are inversion injuries involving the lateral ligaments, primarily the anterior talofibular ligament, closely followed by the calcaneofibular ligament.
RICE—rest, ice, compression, and elevation—are the mainstays of early management; surgery for grade-III sprains, especially for young professional athletes.
calcaneofibular ligamentAbbreviation: CFL
An extracapsular ligament of the lateral ankle joint. The calcaneofibular ligament originates from the inferior apex of the lateral malleolus and courses at approximately a 133° angle to attach to the calcaneus. It is the primary restraint against talar inversion when the ankle is in its neutral position.
See also: ligament
calcaneofibular ligament; CFL extra-capsular, cord-like ligament crossing ankle and subtalar joints; originates at distal inferior surface of fibula and inserts into tubercle on lateral aspect of calcaneum, deep to the peroneal tendons; strongly resists calcaneal inversion (see Table 1)
|Type||Characteristics of the injury to the ankle ligament|
|Grade I||History of mild inversion injury|
|Overstretching of lateral collateral ligament + microscopic tears of ATFL fibres|
|Stable ankle joint but some restriction in range of motion/weight-bearing|
|Mild local swelling without bruising/ecchymosis along lateral border of ankle|
|Pinpoint area of tenderness overlying area of ligament injury|
|Grade II||History of moderate inversion injury|
|Complete tear of ATFL and partial tear of CFL|
|Mild/moderate ankle instability with restricted range of motion|
|Moderate swelling over anterior lateral aspect of ankle with marked soft-tissue bruising/ecchymosis or haemorrhage in area of injury|
|Marked pain on direct palpation of ATFL|
|Grade III||History of severe inversion injury|
|Complete tear of ATFL, CFL and underlying joint capsule|
|Marked instability and laxity of ankle with positive anterior drawer test, talar inversion tilt and inability to evert foot at subtalar joint|
|Severe swelling along lateral border of ankle and heel with marked haemorrhage and ecchymosis|
|Discrete pain and tenderness of soft tissues overlying ATFL, CFL and anterolateral joint capsule|
ATFL, anterior talofibular ligament; CFL, calcaneofibular ligament.