Plantar Foot

Question 1

Abductor Hallucis (Layer 1)

Answer 1

Origin: Calcaneus

Insertion: 1st proximal phalanx

Action: 2nd-5th PIP flexion

Innervation: Tibial nerve (S1-3)

Question 2

Flexor Digitorum Brevis (Layer 1)

Answer 2

Origin: Calcaneus

Insertion: Middle phalanges 2-5

Action: 2nd-5th PIP flexion

Innervation: Tibial nerve (S1-3)

Question 3

Abductor Digiti Minimi (Layer 1)

Answer 3

Origin: Calcaneus

Insertion: 5th proximal phalanx

Action: 5th MTP abduction

Innervation: Tibial nerve (S1-3)

Question 4

Quadratus Plantae (Layer 2)

Answer 4

Origin: Calcaneus

Insertion: FDL tendon

Action: Assist FDL (realigns oblique pull)

Innervation: Tibial nerve (S1-3)

Question 5

Lumbricales (Layer 2)

Answer 5

Origin: FDL tendons

Insertion: Extensor hoods

Action: MTP flexion, IP extension

Innervation: Tibial nerve (S2, S3)

Question 6

Flexor Hallucis Brevis (Layer 3)

Answer 6

Origin: Cuboid, lateral cuneiform, tibial posterior tendon

Insertion: 1st proximal phalanx

Action: 1st MTP flexion

Innervation: Tibial nerve (S1, S2)

Question 7

Adductor Hallucis (Layer 3)

Answer 7

Origin:
Transverse Head - 3rd-5th MTPs
Oblique Head - 2nd-4th MT

Insertion: 1st proximal phalanx

Action: 1st MTP adduction

Innervation: Tibial nerve (S2, S3)

Question 8

Flexor Digiti Minimi Brevis (Layer 3)

Answer 8

Origin: Base of 5th MT

Insertion: 5th proximal phalanx

Action: 5th MTP flexion

Innervation: Tibial nerve (S2, S3)

Question 9

Dorsal Interossei (Layer 4)

Answer 9

Origin: Metatarsals

Insertion: Extensor hoods

Action: Abduction of toes 2-4

Innervation: Tibial nerve (S2, S3)

Question 10

Palmar Interossei (Layer 4)

Answer 10

Origin: 3rd-5th Metatarsals

Insertion: Extensor hoods

Action: Adduction of toes 3-5

Innervation: Tibial nerve (S2, S3)