Lecture 17: Foot Instrinsics Flashcards
extensor digitorum brevis action
aids the extensor digitorum longus with digits 2-4 extension @MTP & IP joints
extensor digitorum brevis PA
calcaneus (floor of tarsal sinus)
interosseous talocalcaneal ligament
stem of inferior extensor retinaculum
extensor digitorum brevis DA
long extensor tendons of digits 2-4
extensor digitorum brevis nerve innervation
deep fibular nerve L5, S1
extensor hallucis brevis action
aids the extensor hallucis longus with great toe extension @ MTP & IP joints
extensor hallucis brevis PA
calcaneus (floor of tarsal sinus)
interosseous talocalcaneal ligament
stem of inferior extensor retinaculum
extensor hallucis brevis DA
dorsal aspect of base of proximal phalanx of great toe
extensor hallucis brevis nerve innervation
deep fibular nerve L5, S1
abductor hallucis action
1st digit abduction
1st digit flexion
abductor hallucis PA
medial tubercle of calcaneal tuberosity
plantar aponeurosis
intermuscular septa
abductor hallucis DA
base of proximal phalanx of 1st digit
abductor hallucis nerve innervation
medial plantar nerve L5, S1
flexor digitorum brevis action
digits 2-5 flexion @ MTP & PIP joints
flexor digitorum brevis PA
medial tubercle of calcaneal tuberosity
plantar aponeurosis
intermuscular septa
flexor digitorum brevis DA
both sides of middle phalanges of digits 2-5
flexor digitorum brevis nerve innervation
medial plantar nerve L5, S1
abductor digiti minimi action
5th digit abduction and flexion @ MTP & PIP joints
abductor digiti minimi PA
medial and lateral tubercles of calcaneal tuberosity
plantar aponeurosis
intermuscular septa
abductor digiti minimi DA
base of proximal phalanx of 5th digit
abductor digiti minimi nerve innervation
lateral plantar nerve S1, S2, S3
quadratus plantae action
assists flexor digitorum longus with digits 2-5 flexion @ MTP & IP joints
quadratus plantae PA
medial calcaneus
quadratus plantae DA
flexor digitorum longus tendon
quadratus plantae nerve innervation
lateral plantar nerve S1, S2, S3
lumbricals action
of digits 2-5…
MTP flexion
PIP & DIP extension
lumbricals PA
flexor digitorum longus tendons
lumbricals DA
medial aspects of extensor expansions over digits 2-5
lumbricals nerve innervation
medial one:
medial plantar nerve L5, S1
lateral three:
lateral plantar nerve S1, S2, S3
adductor hallucis action
1st digit adduction
assists in maintaining transverse arch by pulling metatarsals medially
adductor hallucis PA
oblique head:
bases of metatarsals 2-4
transverse head:
plantar ligaments of MTP joints
adductor hallucis DA
lateral side of base of proximal phalanx of 1st digit
adductor hallucis nerve innervation
lateral plantar nerve S1, S2, S3
flexor hallucis brevis action
1st MTP joint flexion
flexor hallucis brevis PA
plantar cuboid
lateral cuneiforms
flexor hallucis brevis DA
both sides of base of proximal phalanx of 1st digit
2 sesamoid bones are contained within these tendons!
flexor hallucis brevis nerve innervation
medial plantar nerve L5, S1
flexor digiti minimi brevis action
5th MTP joint flexion
flexor digiti minimi brevis PA
base of 5th metatarsal
flexor digiti minimi brevis DA
base of 5th proximal phalanx
flexor digiti minimi brevis nerve innervation
lateral plantar nerve S1, S2, S3
plantar interossei action
digits 3-5 adduction @MTP joint
plantar interossei PA
plantar medial shafts of metatarsals 3-5
plantar interossei DA
medial phalanges of digits 3-5
plantar interossei nerve innervation
lateral plantar nerve S1, S2, S3
dorsal interossei action
digits 2-4 abduction @MTP joint
dorsal interossei PA
adjacent sides of shafts of metatarsals 1-5
dorsal interossei DA
1st:
medial side of proximal phalanx of 2nd digit
2nd-4th:
lateral sides of digits 2-4
dorsal interossei nerve innervation
lateral plantar nerve S1, S2, S3