Superficial Plantar Foot Muscles

Question 1

Layer 1 of superficial plantar foot muscles

Answer 1

Abductor hallucis
Flexor digitorum brevis
Abductor digiti minimi

Question 2

Layer 2 of superficial plantar foot muscles

Answer 2

Quadratus plantae

Lumbrical

Question 3

Abductor hallucis

Answer 3

• Originates on the medial tubercle of the calcaneus
• Inserts on the base of the proximal phalanx of toe 1
• Abducts toe 1.

Question 4

Flexor digitorum brevis

Answer 4

• Originates on the medial tubercle of the calcaneus
• Inserts on the middle phalanges of toes 2—4; splits to allow passage of tendons of flexor digititorum.
• Flexes toes 2—4

Question 5

Abductor digiti minimi

Answer 5

• Originates on the medial and lateral tubercles of the calcaneus
• Inserts on the proximal phalanx of the 5th toe,
• Abducts toe 5.

Question 6

Quadratus plantae

Answer 6

• Originates on the medial and lateral sides of the calcaneus
• Inserts on the tendons of flexor digitorum longus
• Aids in toe flexion.

Question 7

Lumbrical

Answer 7

• Originate on the tendons of flexor digitorum longus
• Insert on the extensor expansions associated with the phalanges of toes 2—5.

• The lumbricals have two actions on digits 2—5:
– They flex the proximal phalanges, and, – They extend the middle and distal phalanges.