Deep Sural Muscles | FDL, FHL & Tibialis Posterior

The video tutorial provides an in-depth look at the anatomy and function of the syral muscles, focusing on the flexor digitorum longus, flexor hallucis longus, and tibialis posterior. It explains their origins, insertions, actions, innervation, and blood supply. The tutorial also covers exercises to strengthen these muscles, such as marble pickups and heel raises, emphasizing their role in foot movement and stability.

Which muscle lies deep to the gastrocnemius and soleus in the posterior compartment of the lower leg?

• Peroneus longus

• Extensor digitorum longus

• Tibialis anterior

• Plantaris

What is the primary action of the flexor digitorum longus?

• Extension of the toes

• Inversion of the foot

• Dorsiflexion of the ankle

• Flexion of the toes

Which nerve innervates the flexor digitorum longus?

• Common peroneal nerve

• Tibial nerve

• Femoral nerve

• Sural nerve

Where does the flexor hallucis longus insert?

• Navicular bone

• Distal phalanx of the great toe

• Base of the first metatarsal

• Cuboid bone

Which artery supplies blood to the flexor hallucis longus?

• Posterior tibial artery

• Anterior tibial artery

• Popliteal artery

• Dorsalis pedis artery

What is the primary purpose of the marble pickup exercise?

• Enhancing ankle stability

• Strengthening the digital flexors

• Improving balance

• Strengthening the intrinsic foot muscles

Which exercise is NOT suitable for strengthening intrinsic foot muscles?

• Foot shortening exercise

• Towel scrunches

• Marble pickups

• Toe curls

What is the main action of the tibialis posterior muscle?

• Subtalar inversion

• Dorsiflexion of the ankle

• Eversion of the foot

• Extension of the toes

Which bones does the tibialis posterior tendon insert on?

• Calcaneus and talus

• Navicular and cuneiforms

• Cuboid and metatarsals 1-2

• Phalanges of the toes

How can you increase the contribution of the tibialis posterior during heel raises?

• Turn the toes outward

• Perform the exercise seated

• Use a heavier weight

• Turn the toes inward