MM of the foot Flashcards
Abductor digiti minimi
attachments- from calcaneal tuberosity to lateral side of proximal phalangeal base of 5th digit
actions- abducts & flexes 5th digit
innervation- lateral plantar nerve
(S1-2)
Abductor Hallucis
attachments- from medial calcaneal tuberosity to medial side of proximal phalangeal base of great toe
actions- flexes & abducts great toe
innervation- medial plantar nerve
(L4-5-S1)
Adductor hallucis
attachments- from 2-4th metatarsal bases (oblique head) & distal ends of 3-5 metatarsal (transverse head) to lateral base of the proximal phalanx of great toe
actions- adducts great toe
innervation- lateral plantar nerve
(S1-2)
Extensor digitorum brevis
attachments- from anterolateral calcaneus to dorsal aspect of the base of the proximal phalanx (digit 1 for EHB) or to the lateral side of tendons of extensor digitorum longus (digits 2-4 for EDB)
actions- extension of digits 2-5 (MP & IP; EDB) and extension of digit 1 (EHB)
innervation- deep fibular nerve
L4-5-S1
(medial slip of this muscle is extensor hallucis brevis)
Extensor hallucis brevis
attachments- from extensor digitorum brevis to dorsal aspect of the base of the proximal phalanx of the hallux
action- extension of great toe at metatarsophalangeal joint
innervation- deep fibular nerve
(L4-5-S1)
Quadratus plantae
attachments- from medial surface of calcaneus & lateral process of calcaneal tuberosity to long flexor tendons
actions- assists flexor digitorum longus
innervation- lateral plantar nerve
(S1-2)
Flexor digitorum brevis
attachments- from medial process of calcaneal tuberosity to sides of intermediate phalanges of digits 2-5
actions- flexes toes (proximal IP)
innervation- medial plantar nerve
(L4-5-S1)
Flexor digiti minimi brevis
attachments- from 5th metatarsal base to proximal phalangeal base
actions- flexion of 5th digit (MP)
innervation- lateral plantar nerve
(S1-2)
Flexor hallucis brevis
attachments- from cuboid & tendon of tibialis posterior to base of the proximal phalanx of great toe
actions- flexion of great toe (MP)
innervation- medial plantar nerve
(L4-5-S1)
Dorsal interossei
attachments- from metatarsal shafts to proximal phalangeal bases & dorsal digital expansions of digits 2-4
actions- abducts (MP) & flexes (MP) digits 2-4
innervation- lateral plantar nerve
(S1-2)
Plantar interossei
attachments- from plantar surface of base of metatarsals to dorsal digital expansions of digits 3-5
actions- adducts & flexes (MP) digits 3-5
innervation- lateral plantar nerve
(S1-2)
Lumbricals
attachments- from tendons of flexor digitorum longus to medial sides of dorsal expansions of digits 2-5
actions- flexes proximal phalanges (MP), and extend IP joints
innervation- 1st- medial plantar nerve & 2nd-4th- lateral plantar nerve
(1st: L4-5-S1; 2nd -4th: S1-2)
