Structures of the Foot

Question 1

Extensor Hallucis Brevis

Answer 1

Origin: Dorsal Calcaneus
Insertion: first extensor expansion hood
Action: EXT 1st IP of foot and MTP
Nerve: Deep fibular (VR L4-S3)
Perfusion: Dorsal pedis aa/vv

Question 2

Extensor Digitorum Brevis

Answer 2

Origin: Dorsal Calcaneus
Insertion: 2-5 extensor expansion hood
Action: EXT 2-5 MTP, PIP, and DIP
Nerve: Deep Fibular (VR L4-S3)
Perfusion: dorsal pedis aa/vv

Question 3

Abductor Hallucis

Answer 3

Origin: Calcaneus
Insertion: 1st proximal phalanx
Action: ABD big toe
Nerve: medial plantar (VR L4-S3)
Perfusion: medial plantar aa/vv

Question 4

Abductor Digiti Minimi

Answer 4

Origin: Calcaneus
Insertion: 5th Proximal Phalange
Action: ABD little toe
Nerve: lateral plantar (VR L4-S3)
Perfusion: lateral plantar aa/vv

Question 5

Flexor Digitorum Brevis

Answer 5

Origin: Calcaneus
Insertion: middle phalanges 2-5
Action: FLX 2-5 MTP and PIP
Nerve: medial plantar (VR L4-S3)
Perfusion: medial plantar aa/vv

Question 6

Flexor Hallucis Brevis (medial and lateral belly)

Answer 6

Origin: cuboid, lateral cuneiform
Insertion: 1st proximal phalanx
Action: FLX 1st MTP
Nerve: medial plantar (VR L4-S3)
Perfusion: medial plantar aa/vv

Question 7

Flexor Digiti Minimi Brevis OF THE FOOT

Answer 7

Origin: base of 5th Metatarsal
Insertion: 5th proximal phalange
Action: FLX 5th MTP
Nerve: lateral plantar (VR L4-S3)
Perfusion: lateral plantar aa/vv

Question 8

Quadratus Plantae

Answer 8

Origin: calcaneus
Insertion: tendons of flexor digitorum longus
Action: aid FDL actions (foot arch)
Nerve: Lateral Plantar (VR L4-S3)
Perfusion: lateral plantar aa/vv

Question 9

Lumbricals 4x

Answer 9

Origin: tendons of flexor digitorum longus
Insertion: 2-5 extensor expansion hood
Action: FLx 2-5 MTP; EXT 2-5 PIP and DIP
Nerve: #1 lumbrical medial plantar n (VR L4-S3) #2-4 lateral plantar ( VR L4-S3)
Perfusion: #1 lumbrical medial plantar aa/vv, #2-4 lumbricals lateral plantar aa/vv

Question 10

Adductor Hallucis

Answer 10

Origin: Transverse: metatarsals 2-5; Oblique: metatarsals 2-4
Insertion: 1st proximal phalanx
Action: ADD big toe
Nerve: lateral plantar VR L4-S3
Perfusion: lateral plantar aa/vv

Question 11

Dorsal Interosseous (4)

Answer 11

Origin: all metatarsals
Insertion: proximal phalange 2-4
Action: ABD digits 1,3,4,5 from digit 2 (at MTP)
Nerve: lateral plantar VR L4-S3
Perfusion: lateral plantar aa/vv

Question 12

Plantar Interosseous 3x

Answer 12

Origin: medial aspect of metatarsals 3-5
Insertion: proximal phalange 3-5
Action: ADD digits 3-5 (at MTP)
Nerve: lateral plantar VR L4-S3
Perfusion: lateral plantar aa/vv

Question 13

Plantar Aponeurosis