Week 10: OIA Lower Extremity

Question 1

Origin of Tibialis Posterior

Answer 1

Proximal, posterior shaft tibia and fibula, interosseous membrane

PP - TF
T for tibia F for fibula

Question 2

Insertion of Tibialis Posterior

Answer 2

5 tarsal bones, base 2-4 met

Question 3

Action of Tibialis posterior

Answer 3

plantarflexion and inversion

Question 4

Origin of Flexor Hallucis Longus

Answer 4

Middle 1/2 posterior fibula

Middel 1/2 PF
Hall = half

Question 5

Insertion of flexor Hallucis Longus

Answer 5

Distal Phalanx 1st toe

Question 6

Action of flexor Hallucis Longus

Answer 6

Flexion of 1st toe, invert foot and assist in plantar flexion

Question 7

Origin of Flexor Digitorum Longus

Answer 7

Middle, posterior tibia

T in digit = T in tibia
Back side of tibia

Question 8

Insertion of flexor digitorum longus

Answer 8

Distal phalanx 2-5th toes,

Question 9

Action of flexor digitorum longus

Answer 9

Flex 2-5 toe, invert foot, assist in plantar flexion

Question 10

Origin of extensor digitorum brevis

Answer 10

Dorsal surface calcaneus

Digitorum (D) = D in dorsal
D-E (ABCDE)

Question 11

Insertion of Extensor digitorum brevis

Answer 11

2-4 toe via EDL tendon

EDB = EDL
ED = ED

Question 12

action of Extensor digitorum brevis

Answer 12

Extend 2-4th toes

Question 13

Origin of flexor digitorum brevis

Answer 13

Medial calcaneus; plantar aponeurosis

M at the end of digitorum = M in medial

Question 14

Insertion of flexor digitorum brevis

Answer 14

Middle phalange 2-5th toe

Question 15

Action of flexor digitorum brevis

Answer 15

Flexion and middle phalange 2-5 toe

Question 16

Origin of extensor hallucis brevis

Answer 16

Dorsal surface of calcaneus

Question 17

Insertion of extensor hallucis brevis

Answer 17

Proximal phalanx 1st toe

Question 18

Action of extensor hallucis brevis

Answer 18

Extension of 1st toe

Question 19

Origin of flexor hallucis brevis

Answer 19

Plantar surface cuboid, lateral cuneiform

Plan cube and lateral cuneiform

Question 20

Insertion of flexor hallucis brevis

Answer 20

Med, lat surface base proximal 1st toe

FHB = ML-1

Question 21

Action of flexor hallucis brevis

Answer 21

Flexion of 1st toe

Question 22

Origin of abductor Hallucis

Answer 22

Medial calcaneus, plantar aponeurosis

Question 23

Insertion of abductor Hallucis

Answer 23

Proximal phalanx 1st toe, medial sesamoid bone

1st toe and medial sesamoid

Question 24

Action of abductor hallucis

Answer 24

Abductor 1st toe, assist flexion of 1st toe

Question 25

Origin of adductor hallucis

Answer 25

Oblique H: base 2-4 toe Transverse H: plantar ligament, 3-5 MTP joint ## Footnote O: 2-4 T: 3-5 MTP

Question 26

Insertion of adductor Hallucis

Answer 26

Lateral surface base proximal phalanx 1st toe

Question 27

Action of adductor Hallucis

Answer 27

Adduction, assist flexion 1st toe, assist maintain arch ## Footnote Adds flexion and assistance

Question 28

Origin of abductor digiti minimi

Answer 28

Lateral calcaneus; plantar aponeurosis

Question 29

Insertion of abductor digiti minimi

Answer 29

Proximal phalanx 5th

Question 30

Action of abductor digiti minimi

Answer 30

flexion of 5th, assist in abduction of 5th

Question 31

Origin of flexor digiti minimi

Answer 31

base 5th metacarpal

Question 32

Insertion of flexor digiti minimi

Answer 32

Base proximal phalanx 5th toe

Question 33

Action of flexor digiti minimi

Answer 33

Flexion of 5th

Question 34

Origin of Quadratus plantae

Answer 34

medial and lateral sides plantar surface calcaneus ## Footnote MLC

Question 35

Insertion of Quadratus plantae

Answer 35

Posterior, lateral aspect FDL tendon

Question 36

Action of Quadratus Plantae

Answer 36

Assist FD in 2-5 flexion

Question 37

Origin of Dorsal Interossei

Answer 37

Adjacent surface of all metacarpals

Question 38

Insertion of dorsal interossei

Answer 38

1st: medial, proximal of 2nd 2-4: lateral, proximal 2-4th

Question 39

Action of dorsal interossei

Answer 39

Abduction and flexion 2-4th ## Footnote Abd(minus) flexion

Question 40

Origin Plantar interossei

Answer 40

Medial surface 3-5th metacarpal

Question 41

Insertion of plantar interossei

Answer 41

Medial surface proximal 3-5th toe

Question 42

Action of plantar interossei

Answer 42

Adduction and flexion 3-5th

Question 43

Origin of lumbricals

Answer 43

Tendon FDL

Question 44

Insertion of lumbricals

Answer 44

Base proximal 2-5th toes, EDL tendon, dorsal surface

Question 45

Action of lumbricals

Answer 45

Flexion proximal 2-5 MTP, extend middle and distal phalanx 2-5 PIP and DIP