Joints of the Lower Limb Flashcards

The ankle (talocrural) joint primarily allows which movements?

Answer: Dorsiflexion and plantarflexion

The talocrural joint is a hinge (ginglymus) joint that permits dorsiflexion and plantarflexion; inversion and eversion occur primarily at the subtalar joint.

The most commonly injured ligament in an inversion ankle sprain is:

Answer: Anterior talofibular ligament

The anterior talofibular ligament (ATFL) is the weakest and most frequently torn ligament in inversion ankle sprains, as it is taut during plantarflexion.

The subtalar (talocalcaneal) joint primarily contributes to which foot movements?

Answer: Inversion and eversion

The subtalar joint, between the talus and calcaneus, is the main joint responsible for foot inversion and eversion, allowing adaptation to uneven surfaces.

Which bone is sometimes called the 'keystone' of the medial longitudinal arch?

Answer: Talus

The talus sits at the apex of the medial longitudinal arch and transmits body weight to both the calcaneus posteriorly and the navicular anteriorly.

The deltoid ligament of the ankle resists which force?

Answer: Eversion of the foot

The strong deltoid (medial collateral) ligament on the medial side of the ankle is the primary restraint against eversion, making isolated deltoid tears uncommon.

The Lisfranc joint complex refers to the articulation between:

Answer: Tarsals and metatarsals

The Lisfranc joint (tarsometatarsal joint complex) connects the midfoot tarsals to the five metatarsal bases; injuries here are clinically significant and often missed.

The interosseous talocalcaneal ligament is located in which anatomical space?

Answer: Sinus tarsi

The interosseous talocalcaneal ligament lies within the sinus tarsi (a canal between the talus and calcaneus), binding the two bones and limiting subtalar motion.