Muscles of the Foot Flashcards
Abductor digiti minimi attachments
from calcaneal tuberosity to lateral side of proximal phalangeal base of 5th digit
Abductor digiti minimi actions
abducts the 5th digit, flexes the 5th digit
abductor digiti minimi innervation
lateral plantar nerve (S1-2)
Abductor hallucis attachments
from medial calcaneal tuberosity to medial side of proximal phalangeal base of great toe
Abductor hallucis actions
abducts and flexes the great toe
abductor hallucis innervation
medial plantar nerve (L4-5-S1)
Flexor digitorum brevis attachments
from medial process of calcaneal tuberosity to sides of intermediate phalanges of digits 2-5
Flexor digitorum brevis actions
flexes toes (proximal IP)
flexor digitorum brevis innervation:
medial plantar nerve (L4-L5-S1)
quadratus plantae attachments
from medial surface of calcaneus & lateral process of calcaneal tuberosity to long flexor tendons via the flexor digitorum longus
quadratus plantae actions
assists flexor digitorum longus with toe flexion at PIP AND DIP
quadratus plantae innervation
lateral plantar nerve (S1-2)
lumbricals attachments
from tendons of flexor digitorum longus to medial sides of dorsal expansions of digits 2-5
lumbricals actions
flexes proximal phalanges (MTP), and extend IP joints
lumbricals innervation
1st- medial plantar nerve & 2nd-4th- lateral plantar nerve (1st: L4-5-S1; 2nd -4th: S1-2)
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
adductor hallucis actions
adducts great toe
adductor hallucis innervation
lateral plantar nerve (S1-2)
flexor digiti minimi brevis attachments
from 5th metatarsal base to proximal phalangeal base of the 5th digit
flexor digiti minimi brevis attachments
flexor digiti minimi brevis actions
flexion of 5th digit (MP-metatarsophalangeal joint )
flexor digiti minimi brevis 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
flexor hallucis brevis actions
- flexion of great toe (MP)
flexor hallucis brevis innervation
medial plantar nerve (L4-5-S1)
plantar interossei attachments
from plantar surface of base of metatarsals to dorsal digital expansions of digits 3-5
plantar interossei actions
adducts & flexes (MP) digits 3-5
plantar interossei innervation
lateral plantar nerve (S1-2)
dorsal interossei attachments (4 muscles)
from metatarsal shafts to proximal phalangeal bases & dorsal digital expansions of digits 2-4
dorsal interossei actions
abducts and flexes (MP) digits 2-4
dorsal interossei innervation
lateral plantar nerve (S1-2)
extensor digitorum brevis attachments (dorsal surface of the foot)
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)
extensor digitorum brevis actions
extension of digits 2-5 (MP & IP; EDB) and extension of digit 1 (EHB)
extensor digitorum brevis innervation
deep fibular nerve brevis (L4-5-S1; medial slip of this muscle is extensor hallucis brevis)
extensor hallucis brevis attachments
from anterolateral calcaneus to dorsal aspect of the base of the proximal phalanx of the great toe
extensor hallucis brevis actions
extends the great toe at the metatarsophalangeal joint
extensor hallucis brevis innervation
deep fibular nerve (L4-L5-S1)
