Muscle Chart: 1st Plantar Surface Layer

Question 1

Flexor Digitorum Brevis

Origin, Insertion, Innervation, Blood Supply

Answer 1

Origin: Medial process of calcaneus and plantar aponeurosis

Insertion: Middle phalanx of 2nd and 5th toes

Innervation: Medial plantar from tibial nerve (L4, L5, S1)

Blood Supply: Medial plantar artery

Question 2

Flexor Digitorum Brevis Movements

Answer 2

Flex middle phalanges of the 2nd and 5th toes (PIP joints)

Question 3

Abductor Hallucis

Origin, Insertion, Innervation, Blood Supply

Answer 3

Origin: Medial process of calcaneus and plantar aponeurosis

Insertion: Proximal phalanx of the 1st toe (medial surface) and medial sesamoid bone

Innervation: Medial plantar nerve from tibial nerve (L4, L5, S1)

Blood Supply: Medial plantar artery

Question 4

Abductor Hallucis Movements

Answer 4

Abduct the 1st toe at MTP joint

Flex 1st toes MTP joint

Question 5

Abductor Digiti Minimi (foot)

Origin, Insertion, Innervation, Blood Supply

Answer 5

Origin: Lateral process of calcaneus and plantar aponeurosis

Insertion: Proximal phalanx of 5th toe (lateral surface)

Innervation: Lateral plantar nerve from tibial nerve (S1, S2)

Blood Supply: Lateral plantar artery

Question 6

Abductor Digiti Minimi Movements

Answer 6

Flex 5th toe

Abduct the 5th toe at MTP joint