Anatomy Exam Joints of the Lower Limb 4

Question 1

The ankle (talocrural) joint primarily allows which movements?

Accepted Answer

Dorsiflexion and plantarflexion

Answer

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

Question 2

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

Accepted Answer

Anterior talofibular ligament

Answer

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

Question 3

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

Accepted Answer

Inversion and eversion

Answer

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

Question 4

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

Accepted Answer

Talus

Answer

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

Question 5

The deltoid ligament of the ankle resists which force?

Accepted Answer

Eversion of the foot

Answer

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

Anatomy Exam Practice Test

Anatomy Exam Practice Test

Anatomy Exam Joints of the Lower Limb 4