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plan·tar cal·ca·ne·o·na·vic·u·lar lig·a·ment[TA]
a dense fibroelastic ligament that extends from the sustentaculum tali to the plantar surface of the navicular bone; it supports the head of the talus, actually forming part of the articular "socket" for the head of the talus.
The interior calcaneonavicular ligament of the sole of the foot. It joins the calacaneus to the navicular.
See also: ligament
spring ligament; plantar calcaneonavicular ligament ligament binding the navicular to the sustentaculum tali; forms plantar part of the socket into which the head of talus fits (remainder of socket is formed by the anterior calcaneum and proximal navicular facet) (see Table 1)
|Long plantar ligament (LPL)||Plantar aspect of calcaneum (just anterior to calcaneal tuberosity); insert|
• Deep portion: into plantar aspect of cuboid
• Superficial portion: base of 2-5 metatarsals
|Short plantar ligament (SPL) (plantar calcaneocuboid ligament)||Anterior tubercle of calcaneum; inserts into adjacent plantar surface of cuboid|
|Spring ligament (SL) (plantar calcaneonavicular ligament)||Anterior margin of sustentaculum tali; inserts into plantar aspect of navicular|
|Interosseous ligament (IL) (talocalcaneal ligament)||Within sinus tarsi; connects non-articular parts of subtalar joint|
|Deltoid ligament (DL) (medial collateral ankle ligament)||Fans out from anterior, medial and posterior aspects of medial malleolus; insets into navicular, spring ligament, sustentaculum tali and adjacent talus|
|Plantar aponeurosis (PA) (deep plantar fascia)||From calcaneal tuberosity to midfoot, where it splits into five bands|
|Each band attaches distally to plantar aspect of transverse intermetatarsal ligament (overlying and linking plantar aspects of all metatarsophalangeal joints) and plantar surface of respective proximal phalanx|