LEA Quiz 8 Muscles Flashcards
origin of the extensor digitorum brevis
sinus tarsi, superolateral calcaneus, interoessous talocalcaneal ligament, cruciate crural ligament
insertion of the EDB
lateral aspect of EDL tendons 2-4
- 1st tendon goes to 2nd digit
- 2nd tendon to 3rd digit
- 3rd tendon to 4th digit
nerve to EDB
lateral terminal branch of deep fibular
blood supply to EDB
lateral tarsal artery
function of the EDB
dorsiflex toes 2-4
extensor hallucis brevis origin
sinus tarsi, superolateral calcaneus, interoessous talocalcaneal ligament, cruciate crural ligament
extensor hallucis brevis insertion
dorsal aspect of the proximal phalanx of hallux
extensor hallucis brevis nerve
lateral terminal branch of deep fibular
extensor hallucis brevis blood
lateral tarsal artery
extensor hallucis brevis fxn
dorsiflex hallux
proximal attachment of the medial band of plantar fascia
medial tubercle of calcanea tuberosity
distal attachment of the medial band of plantar fascia
not bony, blends with fascia- fascia dorsals pedis, inferior band of cruciate crural ligament, central band of plantar fascia
proximal attachment of the lateral band of plantar fascia
lateral tubercle of calcaneus tuberosity
distal attachment of the lateral band of plantar fascia
deep fascia (fascia dorsali pedis and central band) styloid process of 5th met (calcaneometatarsal ligament)
abductor hallucis origin
medial tubercle of calcaneal tuberosity, flexor retinaculum, plantar fascia, and intermusuclar septum
abductor hallucis insertion
medial tubercle base of proximal phalanx of hallux, medial sesamoid
abductor hallucis nerve and blood
medial plantar artery and nerve
flexor digitorum brevis origin
medial tubercle of calcaneal tuberosity, plantar aponeurosis, intermusuclar septum
flexor digitorum brevis insertion
plantar aspect of the bases of middle phalanges 2-5
blood and nerve to flexor digitorum brevis
medial plantar artery and nerve
function of flexor digitorum brevis
flex digits 2-5 PIP and MTP)
abductor digiti minimi (quinti) origin
medial and lateral tubercles of calcaneal tuberosity, plantar aponeurosis, inter muscular septum
abductor digiti minimi (quinti) insertion
lateral base of the proximal phalanx of 5th toe
blood and nerve to abductor digiti minimi (quinti)
lateral plantar artery and nerve (inferior calcaneal nerve, baxters nerve)
function of abductor digiti minimi (quinti)
abduct 5th toe, plantar flexes 5th toe
origin of the quadratus plantae
medial head: medial surface calcaneus
lateral head: triennium plantar and inferior calcareous distal to lateral tubercle.
quadratus plantae insertion
heads untie to insert onto the FDL tendon
blood to quadratus plantae
medial and lateral plantar arteries
quadratus plantae nerve
lateral plantar nerve
function of quadratus plantae
redirect the pull of the FDL, helps flex phalanges
origin of the lumbricals
1st lumbrical: medial side of 1st tendon of FDL (tendon going to 2nd digit)2 – 4: adjacent tendons (e.g. 3rd lumbrical: medial side of 3rd, lateral side of 2nd; 2nd lumbrical medial side of 2, lateral side of 1)
insertion off lumbricals
medial aspect of extensor wing of the extensor expansion at base of proximal phalanx of digits 2-5
blood supply of lumbricals
respective plantar metatarsal arteries
function of lumbricals
flex MTP joints, extend PIP and DIP joints
origin of the flexor hallucis brevis
lateral: plantar surface of cuboid and lateral cuneiform medial: tibialis posterior tendon
insertion of the flexor hallucis brevis
medial and lateral plantar aspect of the base of proximal phalanx
blood to FHB
1st plantar metatarsal artery
nerve to FHB
medial plantar nerve, Proper plantar digital nerve 1 (of hallux)
function of FHB
flex (plantarflex) hallux MTP joint
Flexor digiti minimi brevis origin
base of 5th metatarsal, tendon sheath of fibularis longus
Flexor digiti minimi brevis insertion
plantar/lateral aspect of base of proximal phalanx of 5th toe
Flexor digiti minimi brevis blood
lateral plantar artery
Flexor digiti minimi brevis nerve
superficial branch of lateral plantar nerve (proper plantar digital branch)
Flexor digiti minimi brevis fxn
flex (plantar flex) 5th digit at MTP joint
adductor hallucis origin
transverse head:fibrous capsule, plantar plates of digits 3-5, deep transverse metatarsal ligament
oblique head: plantar aspect of metatarsal bases 2-4; fibularis longus tendon sheath
adductor hallucis insertion
lateral sesamoid and lateral aspect of proximal phalanx base of 1st digit
adductor hallucis blood
plantar metatarsal arteries
adductor hallucis nerve
deep branch of lateral plantar nerve
function of adductor halluis
adducts hallux
opponens digiti minimi origin
base of 5th metatarsal, long plantar ligament, FDMB, tendon sheath of fibularis longus
opponens digiti minimi insertion
lateral shaft of 5th metatarsal and surrounding fascia
opponens digiti minimi fxn
Abduction and flexion of 5th toe
blood supply to dorsal interossei
corresponding dorsal metatarsal artery
nerve to dorsal interoessei
lateral plantar nerve
-deep branch of lateral plantar nerve innervates 1st – 3rd
• superficial branch of lateral plantar nerve innervates 4th
•1st also receives innervation from deep fibular nerve
nerve to plantar interossei
lateral plantar nerve
•Superficial branch innervates 3rd plantar interossei
•Deep branch innervates 1st and 2nd plantar interossei
blood to plantar interossei
plantar metatarsal arteries 2-4
