Foot Muscles

Question 1

Main innervation of muscles of the sole of the foot?

Answer 1

By branches of tibial nerve:
Medial plantar nerve
Lateral plantar nerve

Question 2

Name the muscles of sole of foot?

Answer 2

4 layers:

1st layer
1.Abductor hallucis
2.Flexor digitorum brevis
3.Abductor digiti minimi

2nd layer
4. Quadratus plantae
5. Flexor digitorum longus
6. Lumbricals
7. Flexor hallucis longus

3rd layer
8. Flexor hallucis brevis
9. Adductor hallucis
10. Flexor digiti minimi brevis

4th layer
11. Dorsal Interossei
12. Plantar interossei
13. Peroneus longus
14. Tibialis posterior

Question 3

Origin and insertion of flexor digitorum brevis?

Answer 3

origin
Medial tubercle of calcaneum

Insertion
Medial phalanx of 4 lateral toes

Question 4

Medial to flexor digitorum brevis is which muscle?

Answer 4

Abductor hallucis

Question 5

Origin and insertion of abductor hallucis ?

Answer 5

origin
Medial tubercle of calcaneum,
Flexor retinaculum

Insertion
Medial side of base of proximal phalanx of big toe

Question 6

Which is the lateral muscle of the 1st layer of the muscles of sole of foot?

Answer 6

Abductor digiti minimi

Question 7

Origin and insertion of abductor digiti minimi?

Answer 7

origin
Medial and lateral tubercles of calcaneum

Insertion
Lateral side of base of proximal phalanx of the 5th toe

Question 8

Innervation of 1st layer of muscles of the sole of foot?

Answer 8

medial plantar nerve
Abductor hallucis
Flexor digitorum brevis

Lateral plantar nerve
Abductor digiti minimi

Question 9

Name the muscles of second layer of sole of the foot?

Answer 9

2nd layer
Quadratus plantae
Flexor digitorum longus
Lumbricals
Flexor hallucis longus

Question 10

Origin and insertion of quadratus plantae?

Answer 10

origin
Medial and lateral sides of calcaneum

Insertion
Tendon of flexor digitorum longus

Question 11

Innervation of 2nd layer of muscles of sole of foot?

Answer 11

Quadratus plantae - lateral plantar nerve
Flexor digitorum longus -Tibial nerve
Lumbricals
(1st - medial plantar nerve
Remainder - lateral plantar nerve)
Flexor hallucis longus - Tibial nerve

Question 12

Origin and insertion of lumbricals?

Answer 12

Origin
Tendons of flexor digitorum longus

Insertion
Dorsal extensor expansion of lateral 4 toes

Question 13

Name the muscles of 3rd layer of the sole of the foot?

Answer 13

3rd layer
8. Flexor hallucis brevis
9. Adductor hallucis
10. Flexor digiti minimi brevis

Question 14

Origin and insertion of flexor hallucis brevis?

Answer 14

origin
Cuboid and lateral cuneiform bones
Tibialis posterior tendon

Insertion
Medial and lateral sides of the base of the proximal phalanx of the big toe

Question 15

Innervation of muscles of 3rd layer of soles of foot?

Answer 15

Flexor hallucis brevis - medial plantar nerve
Adductor hallucis - Deep branch of lateral plantar nerve
Flexor digiti minimi brevis -
Lateral plantar nerve