Exam II Lecture III

Question 1

Blood supply to dorsum of foot

Answer 1

Anterior tibial artery via dorsalis pedis artery
Arcuate artery- to dorsal digitals
Deep plantar artery

Question 2

Muscles of dorsum of foot

Answer 2

Extensor digitorum brevis
Extensor hallucis brevis
Dorsal interossei- Abductors

Question 3

Superficial peroneal nerve

Answer 3

Supplies dorsum

Gives rise to medial/intermediate dorsal cutaneous nerves

Question 4

Deep peroneal nerve

Answer 4

Supplies dorsum
Lateral branch is motor to EHB and EDB
Medial branch is cutaneous

Question 5

Sural nerve gives off

Answer 5

Lateral dorsal cutaneous nerve

Question 6

Superior/inferior peroneal retinacula

Answer 6

Tendons of peroneus longus and brevis pass through both of these retinacula

Question 7

Blood supply to sole of foot

Answer 7

Posterior tibial artery–>medial/lateral plantar arteries

Perforating arteries

Question 8

Cutaneous nerve supply to sole

Answer 8

Tibial nerve–> Medial calcaneal, medial/lateral plantar
Saphenous nerve
Sural nerve

Question 9

Motor nerve supply to sole

Answer 9

Tibial nerve via lateral/medial plantar nerves

Question 10

Superficial muscle layers in sole

Answer 10

Skin

Plantar aponeurosis

Question 11

First muscle layer in sole

Answer 11

Abductor hallucis
Flexor digitorum brevis
Abductor digit minimi

Question 12

Tendons in first layer in sole

Answer 12

Flexor digitorum longus

Flexor hallucis longus

Question 13

Second muscle layer in sole

Answer 13

Quadratus plantae

Lumbricals

Question 14

Third muscle layer in sole

Answer 14

Flexor hallucis longus tendon
Adductor hallucis
Flexor digiti minimi brevis

Question 15

Fourth muscle layer in sole

Answer 15

Peroneus longus tendon
Tibialis posterior tendon
Interossei
-three plantar adductors
-four dorsal abductors

Question 16

Origin of muscles in first layer

Answer 16

Calcaneal tuberosity

Question 17

Innervation of first layer muscles

Answer 17

Medial plantar nerve for AbH, FDB

Lateral plantar nerve for ADM (abductor digiti minimi)

Question 18

Abductor hallucis insertion/action

Answer 18

Medial sesamoid and base of proximal phalanx big toe

Abducts great toe at MP, helps flex MP

Question 19

Flexor digitorum brevis insertion/action

Answer 19

Sides of middle phalanges of digits 2-5

Flexes PIP joints of digits 2-5

Question 20

Quadratus plantae origin/insertion

Answer 20

Medial head-medial/plantar surface of calcaneus
Lateral head-lateral/plantar surface of calcaneus
Ins- lateral edge of tendon of flexor digitorum longus

Question 21

Action/innervation of quadratus plantae

Answer 21

Help flex DIP joints of digits 2-5

Lateral plantar nerve

Question 22

Lumbricals origin/insertion

Answer 22

First lumbrical from long tendon of second digit
Three lateral lumbricals from b/w the adjacent long flexor tendons
-Joins extensor tendons on medial side of proximal phalanges 2-5

Question 23

Lumbricals action

Answer 23

Flexes MP joints, extends PIP/DIP joints of digits 2-5

Question 24

Lumbricals 2-4 innervation

Answer 24

Lateral plantar nerve

Question 25

Lumbrical 1 innervation

Answer 25

Medial plantar nerve

Question 26

Flexor hallucis brevis origin/insertion

Answer 26

O- Plantar surfaces of cuboid and lateral cuneiforms | I- Both sides of base of proximal phalanx of first digit

Question 27

Flexor hallucis brevis action/innervation

Answer 27

Flexes proximal phalanx of first digit | Medial plantar nerve

Question 28

Adductor hallucis insertion/action/innervation

Answer 28

I- base of proximal phalanx of great toe Adducts the great toe at MP joint Lateral plantar nerve

Question 29

Flexor digiti minimi origin/insertion

Answer 29

O- Sheath of peroneus longus and base of 5th metatarsal | I-Base of proximal phalanx of little toe

Question 30

Flexor digiti minimi action/innervation

Answer 30

Flexes PIP joint of little toe | Lateral plantar nerve

Question 31

Dorsal interossei origin/insertion

Answer 31

O-Adjacent sides of shafts of metatarsals 1-5 | I- Medial side of proximal phalanx digit 2, lateral sides of proximal phalanx of digits 2-4

Question 32

Dorsal interossei action/innervation

Answer 32

Abducts digits 2-4 , flex metatarsal phalangeal joints | Lateral plantar nerve

Question 33

Plantar interossei origin/insertion

Answer 33

O-Each head arises from medial side of metatarsus 3-5 and sheath of peroneus longus I- Medial side of base of proximal phalanx of same digit

Question 34

Plantar interossei action/innervation

Answer 34

Adducts digits 3-5 at MP joint toward second toe Flexes MP joint and extends PIP DIP joints of 3-5 Lateral plantar nerve