LE Lecture 22- Exam 3

Question 1

abductor hallucis

Answer 1

P: Calcaneal tuberosity (medial process); flexor retinaculum, plantar aponeurosis
D: 1st toe (base of proximal phalanx via
the medial sesamoid)
N: medial plantar S1-S2
A: 1st MTP joint: flexion and abduction of the 1st toe; Supports the longitudinal arch

Question 2

flexor hallucis brevis

Answer 2

P: cuboid, lateral cuneiforms, plantar calcaneocuboid ligament
D: 1st toe (at base of proximal phalanx via medial and lateral sesamoids)
N: medial and lateral plantar S1-S2
A: Flexes the first MTP joint; Supports the longitudinal arch

Question 3

abductor digiti minimi

Answer 3

P: Calcaneal Tuberosity (medial tubercle); Plantar Aponeurosis
D: Base of proximal phalanx of the 5th toe; 5th metatarsal at the tuberosity
N: lateral plantar S1-3
A: Flexes the MTP joint of the 5th toe; Abducts the 5th toe; Supports the longitudinal arch

Question 4

quadratus plantae

Answer 4

P: Calcaneal tuberosity (medial and
plantar borders on plantar side)
D: Flexor digitorum longus tendon (lateral border)
N: lateral plantar S1-3
A: Redirects and augments the pull of flexor
digitorum longus

Question 5

lumbrical

Answer 5

P: Flexor digitorum longus tendons (medial borders)
D: 2nd to 5th toes (at dorsal aponeuroses)
N: 1st lumbrical- medial plantar S2-3
2-4 lumbricals- lateral plantar S2-3
A: Flexes the MTP joints of 2nd to 5th toes; Extension of IP joints of 2nd to 5th toes; Adducts 2nd to 5th toes toward the big toe

Question 6

flexor digitorum brevis

Answer 6

P: Calcaneal Tuberosity (medial tubercle); Plantar Aponeurosis
D: Sides of middle phalanges of 2nd to 5th toes
N: medial plantar S1-2
A: Flexes the MTP and PIP joints of the 2nd to 5th toes; Supports the longitudinal arch

Question 7

adductor hallucis

Answer 7

P: Oblique head: 2nd to 4th metatarsals (at bases) cuboid and lateral cuneiforms; Transverse head: MTP joints of 3rd to 5th toes, deep transverse metatarsal ligament
D: 1st proximal phalanx (at base, by a common tendon via the lateral sesamoid)
N: lateral plantar, deep part S2-3
A: Flexes the first MTP joint; Adducts big toe; Transverse head: supports transverse arch; Oblique head: supports longitudinal arch

Question 8

flexor digiti minimi brevis

Answer 8

P: 5th metatarsal (base), long plantar ligament
D: 5th toe (base of proximal phalanx)
N: lateral plantar, superficial branch S2-3
A: Flexes the MTP joint of the little toe

Question 9

plantar interossei

Answer 9

P: 3rd to 5th metatarsals (medial border)
D: 3rd to 5th toes (medial base of proximal phalanx)
N: lateral plantar S2-3
A: Flexes the MTP joints of 3rd to 5th toes; Extension of IP joints of 3rd to 5th toes; Adducts 3rd to 5th toes toward 2nd toe

Question 10

dorsal interossei

Answer 10

P: 1st to 5th metatarsals (by two heads on opposing sides)
D: 1st: 2nd proximal phalanx (medial base)
2nd to 4th interossei: 2nd to 4th proximal phalanges (lateral base), 2nd to 4th toes (at dorsal aponeuroses)
N: lateral plantar S2-3
A: Flexes the MTP joints of 2nd to 4th toes; Extension of IP joints of 2nd to 4th toes; Abducts 3rd and 4th toes from 2nd toe