Foot

Question 1

Abductor digiti minimi

Answer 1

Attachments: medial and lateral calcaneal tuberosities, lateral side of base of proximal phalanx of 5th digit
Innervation: lateral plantar nerve
Actions: abducts and flexes 5th digit

Question 2

Abductor hallucis

Answer 2

Attachments: medial tuberosity of calcaneus, medial side of base of proximal phalanx of 1st digit
Innervation: medial plantar nerve
Actions: abducts and flexes 1st digit

Question 3

Adductor hallucis

Answer 3

Attachments: both heads attach to lateral side of base of proximal phalanx of 1st digit
oblique head - bases of mets 2-4
transverse head - ligaments of metatarsophalangeal joints of digits 3-5
Innervation: deep branch of lateral plantar nerve
Actions: adducts 1st digit, maintains transverse arch

Question 4

Dorsal interossei

Answer 4

Attachments: adjacent sides of 1st-5th metatarsals
1st - medial side of proximal phalanx of 2nd digit
2nd thru 4th - lateral sides of digits 2-4
Innervation: lateral plantar nerve
Actions: abduct 2nd thru 4th toes, flex metatarsophalangeal joints, extend phalanges

Question 5

Flexor digiti minimi brevis

Answer 5

Attachments: base of 5th met to lateral base of proximal phalanx of 5th digit
Innervation: superficial branch of lateral plantar nerve
Actions: flexes proximal phalanx of 5th met

Question 6

Flexor digitorum brevis

Answer 6

Attachments: medial tubercle of calcaneus, both sides of middle phalanges of lateral 4 digits
Innervation: medial plantar nerve
Actions: flexes 2nd thru 5th digits

Question 7

Flexor hallucis brevis

Answer 7

Attachments: plantar surface of cuboid and lateral cuneiform to both sides of base of proximal phalanx of 1st digit
Innervation: medial plantar nerve
Actions: flexes proximal phalanx of 1st digit

Question 8

Lumbricals

Answer 8

Attachments: tendons of flexor digitorum longus to medial side of dorsal digital expansions of lateral 4 digits
Innervation: 1st medial plantar, lateral 3 from lateral plantar
Actions: flexes proximal phalanges at MTP, extends phalanges at PIP and DIP

Question 9

Plantar interossei

Answer 9

Attachments: bases and medial sides of 3rd thru 5th mets to medial sides of bases of proximal phalanges 3-5
Innervation: lateral plantar nerve
Actions: adduct digits 2-4 and flex metatarsophalangeal joint and extend phalanges

Question 10

Quadratus plantae

Answer 10

Attachments: medial and lateral sides of plantar surface of calcaneus to posterolateral edge of FDL tendon
Innervation: lateral plantar nerve
Actions: assists with flexion of the toes; corrects oblique pull of FDL

Question 11

Extensor digitorum brevis and extensor hallucis brevis

Answer 11

Attachments: superolateral calcaneus, lateral talocalcaneal ligament, cruciate crural ligament to proximal phalanx of great toe and lateral sides of EDL tendons to digits 2-4
Innervation: deep fibular nerve
Actions: aids EDL in extending digits at metatarsophalangeal joints and interphalangeal joints