Muscles of the Foot

Question 1

Action of the extensor hallucis brevis m.

Answer 1

dorsiflexes the proximal phalanx of the hallux at the MTPJ

Question 1

Action of the extensor digitorum brevis m.

Answer 1

dorsiflex the phalanges of digits 2-4

Question 2

Action of the quadratus plantae m.?

Answer 2

aids FDL in plantarflexion of the lesser digits

Question 3

Action of the lumbricals?

Answer 3

plantarflex the proximal phalanges, extend the middle and distal phalanges of the lesser digits

Question 4

This muscle adducts and assists in plantarflexion of the hallux.

Answer 4

Adductor hallucis (transverse and oblique head)

Question 5

This muscle plantarflexes the proximal phalanx of the fifth digit.

Answer 5

Flexor digiti minimi

Question 6

This muscle plantarflexes the proximal phalanges of the hallux (at the MTPJ).

Answer 6

Flexor hallucis brevis

Question 7

How many plantar interossei muscles are there?

Answer 7

3

Question 8

How many dorsal interossei muscles are there?

Answer 8

4

Question 9

What is the action of the plantar interossei?

Answer 9

adduct the 3rd, 4th, and 5th digits (moving toward the midline)

Question 10

What is the action of the dorsal interossei?

Answer 10

abduct the 2nd, 3rd, and 4th digits (away from the midline)

Question 11

What are the attachments of the superior extensor retinaculum?

Answer 11

anterior aspect of the tibia and fibula

Question 11

What are the attachments of the inferior extensor retinaculum?

Answer 11

It is Y-shaped. The stem is attached to lateral surface of the calcaneus. Other side is attached to medial malleolus and the plantar aponeurosis.