Foot Muscles

Question 1

Action and Innervation of:

• Extensor digitorum brevis
• Extensor hallucis brevis

Answer 1

Deep fibular nerve

Mainly assist extrinsic muscles in their actions
- EDB - extension of toes 2-4 and MTP joint of great toe

Question 2

What are the muscles of the first layer of the foot

Answer 2

Abductor hallucis
Flexor digitorum brevis
Abductor digiti minimi

Question 3

What are the muscles of the second layer of the foot

Answer 3

Quadratus plantae

Lumbricals

Question 4

What is the innervation and action of abductor hallucis

Answer 4

Medial plantar nerve (from tibial nerve)

Abducts and flexes great toe at MTP joint

Question 5

What is the innervation and action of flexor digitorum brevis

Answer 5

Medial plantar nerve (from tibial nerve)

Flexes lateral 4 toes at proximal IP joint

Question 6

What is the innervation and action of abductor digiti minimi

Answer 6

Lateral plantar nerve (from tibial nerve)

Abducts little toe at MTP joint