Ankle and Foot Structure and actions

The video tutorial covers the anatomy and function of the ankle and foot joints, focusing on the tibiotalar and subtalar joints. It explains the movements allowed by these joints, such as dorsiflexion, plantar flexion, inversion, and eversion. The tutorial also details the ligaments involved in stabilizing the ankle, including the ATFL, PFL, CFL, and deltoid ligament, and clarifies common misconceptions about ankle movements like supination and pronation.

What type of joint is the tibiotalar joint?

• Pivot joint

• Mortise type joint

• Ball and socket joint

• Hinge joint

Which muscles are primarily responsible for dorsiflexion of the foot?

• Flexor digitorum longus and flexor hallucis longus

• Tibialis anterior and extensor digitorum longus

• Gastrocnemius and soleus

• Peroneus longus and brevis

What is the primary function of the sub-talar joint?

• Enabling rotation of the tibia

• Facilitating inversion and eversion

• Allowing plantar flexion and dorsiflexion

• Supporting the arch of the foot

Which ligament is most commonly sprained in the ankle?

• Anterior talofibular ligament

• Posterior talofibular ligament

• Calcaneofibular ligament

• Deltoid ligament

What is the role of the calcaneofibular ligament?

• Facilitating plantar flexion

• Preventing anterior translation of the foot

• Limiting inversion in dorsiflexion

• Supporting the medial arch

How does supination differ from inversion?

• Supination includes inversion, plantar flexion, and adduction

• Supination is the opposite of inversion

• Supination involves only the sub-talar joint

• Supination is the same as inversion

What movement occurs when the plantar surface of the foot faces laterally?

• Supination

• Eversion

• Pronation

• Inversion