Intrinsic Muscles of the Feet [Part 1] Layers 1 & 2

The video tutorial provides an in-depth exploration of the muscles of the feet, focusing on their origins, insertions, innervations, and actions. It begins with an overview of the foot's muscle layers, emphasizing the importance of understanding the superficial and deep layers. The tutorial then delves into the plantar fascia and aponeurosis, explaining their significance in foot anatomy. The first layer of foot muscles, including abductor hallucis and flexor digitorum brevis, is discussed in detail, followed by an examination of the second layer, featuring lumbricals and quadratus plantae.

What is the superficial layer of muscles in the foot closest to?

• The bones

• The floor

• The toes

• The ankle

Which muscle is part of the first layer of foot muscles?

• Flexor hallucis longus

• Quadratus plantae

• Abductor hallucis

• Lumbricals

What is the primary function of the abductor hallucis muscle?

• Flex the great toe

• Extend the great toe

• Adduct the great toe

• Abduct the great toe

Which nerve innervates the intrinsic muscles of the foot?

• Radial nerve

• Femoral nerve

• Medial plantar nerve

• Sciatic nerve

What is the role of the flexor digitorum longus tendon in the foot?

• To flex the toes

• To extend the toes

• To abduct the toes

• To adduct the toes

Where does the flexor digitorum longus tendon insert?

• Middle phalanges of the lateral four toes

• Proximal phalanx of the great toe

• Distal phalanx of the big toe

• Distal phalanx of the lateral four digits

What is the origin of the lumbrical muscles in the foot?

• Dorsal surface of the metatarsals

• Plantar surface of the calcaneus

• Lateral borders of the tendons of flexor hallucis longus

• Medial borders of the tendons of flexor digitorum longus

What is the function of the quadratus plantae muscle?

• Redirect the line of pull of flexor digitorum longus

• Extend the toes

• Abduct the little toe

• Flex the great toe

How many lumbrical muscles are present in the foot?

• Three

• Four

• Five

• Two

Which muscle is not intrinsic to the foot?

• Flexor hallucis longus

• Quadratus plantae

• Flexor digitorum brevis

• Abductor digiti quinti