Chapter 10 Ankle T/F

An ankle sprain caused by inversion is a common injury that involves the stretching or tearing of one or more of the lateral tendons.

False

Both the tibialis anterior muscle and the extensor digitorum longus muscle are innervated by the tibial nerve (L5, S1).

False

Dorsiflexion, the dorsal aspect of the foot moving toward the anterior tibia, occurs through eccentric contractions of the tibialis anterior, extensor digitorum longus, extensor hallucis longus and fibularis tertius.

False

During both walking and running there is a point where neither foot is touching the ground.

False

Each toe has three interphalangeal joints except for the great toe which has only two.

False

Inversion occurs at the talocrural joint by turning the ankle and foot inward toward the midline of the body where the weight is on lateral edge of foot.

False

The cuboid bone is located medially and distally to the navicular bone.

False

The medial malleolus is an enlarged protrusion located on the distal fibula.

False

Both the tibialis posterior muscle and the flexor digitorum longus muscle are innervated by the tibial nerve (L5, S1).

True

Heel-strike normally occurs by landing on the heel with the foot in supination and the leg in external rotation.

True

Motions of the toe metatarsophalangeal joints include flexion, extension, abduction, and adduction.

True

Pronation is a combination of ankle dorsiflexion, subtalar eversion, and forefoot abduction, whether actively or passively.

True

Severe injuries at the distal tibiofibular joint can involve the anterior inferior tibiofibular ligament, interosseous ligament, and interosseous membrane.

True

The anterior tibialis and peroneus longus muscles are antagonist to each other in all of their respective actions.

True

The distal malleoli of the tibia and fibula serve as pulleys for the posterior tendons of the posterior tibialis and peroneus brevis to increase the mechanical advantage of these muscles in performing inversion and eversion actions, respectively.

True

The extensor hallucis longus muscle is a weak agonist to the flexor hallucis longus muscle for concentric actions about the sagittal axis.

True

The gastrocnemius, soleus and plantaris muscles are innervated by the tibial nerve (S1, S2).

True

The only foot extrinsic muscle involved in extending all of the metacarpophalangeal and interphalangeal joints of the four lesser toes is the extensor digitorum longus.

True

The soleus muscle can perform muscular actions only in the sagittal plane about a frontal axis.

True

The tibialis anterior and tibialis posterior muscles are agonistic to each other in their frontal plane movements but are antagonistic to each other in their sagittal plane movements.

True

Toe flexion is movement of toes at the metatarsophalangeal and interphalangeal joints toward plantar surface of the foot through concentric contractions of the flexor digitorum longus and flexor hallucis longus muscles.

True