Lab 1-5 - Dorsum of Foot

Question 1

what forms the medial marginal vein?

Answer 1

medial dorsal digital vein of the great toe
AND
dorsal venous arch

Question 2

where does the great saphenous vein begin?

Answer 2

anterior to the medial malleolus

Question 3

what forms the lateral marginal vein?

Answer 3

lateral dorsal digital vein of the fifth toe
AND
dorsal venous arch

Question 4

where does the lateral marginal vein become the small saphenous vein?

Answer 4

inferior to the lateral malleolus

Question 5

how many dorsal metatarsal veins are there?

Answer 5

4 - located in metatarsal spaces

Question 6

where do the dorsal metatarsal veins terminate?

Answer 6

dorsal venous arch

Question 7

what is the origin of the dorsal metatarsal veins?

Answer 7

dorsal digital veins of the toes

Question 8

the saphenous nerve branches from what nerve?

Answer 8

the saphenous nerve is a sensory branch of the femoral nerve

Question 9

what follows the great saphenous vein in the leg along the lateral side?

Answer 9

spahenous n

Question 10

what n. follows the small saphenous v. in the leg?

Answer 10

sural n.

Question 11

what do you call the continuation of the sural n. on the lateral side of the foot?

Answer 11

lateral dorsal cutaneous n. of the foot

Question 12

what is the name of the n. on the lateral side of the 5th toe and from what n. does it originate?

Answer 12

10th dorsal digital n.

originates from the lateral dorsal cutaneous n. of the foot

Question 13

On occassion the lateral dorsal cutaneous n. will give rise to or anastomose with what n. ?

Answer 13

intermediate dorsal cutaneous n.

Question 14

what n. is located on the anterior surface of ankle joint?

Answer 14

superficial peroneal n.

Question 15

what are the terminal branches of the superficial peroneal n.?

Answer 15

medial dorsal cutaneous n.
AND
intermediate dorsal cutaneous n.

Question 16

the medial terminal branch of the deep peroneal communicates with what nerves?

Answer 16

saphenous n. and medial terminal branch of the deep peroneal

Question 17

what does the medial dorsal cutaneous nerve of the foot give rise to?

Answer 17

1st dorsal digital n.
AND
1st common dorsal digital n.

Question 18

how many dorsal digital branches does the medial dorsal cutaneous n. give rise to? common dorsal digital branches?

Answer 18

one

one

Question 19

what innervates the medial side of the great toe?

Answer 19

1st dorsal digital nerve

Question 20

what nerve do the 4th and 5th dorsal digital nerves come from?

Answer 20

1st common dorsal digital

Question 21

the space between toes two and three is innervated by what nerves?

Answer 21

4th and 5th dorsal digital nn.

Question 22

what does the intermediate dorsal cutaneous n. divide into?

Answer 22

2nd and 3rd common dorsal digital nn.

Question 23

what n. is associated with intermetatarsal space 3?

Answer 23

2nd common dorsal digital n.

Question 24

what n. is associated with intermetatarsal space 4?

Answer 24

3rd common dorsal digital n.

Question 25

The 10th dorsal digital n. originates from what n?

Answer 25

lateral dorsal cutaneous n.

Question 26

The 8th dorsal digital n. originates from what n. ?

Answer 26

3rd common dorsal digital n. which originates from the intermediate dorsal cutaneous n. which originates from the superficial peroneal n.

Question 27

what n. enters the foot from below the tendon of the extensor hallucis longus?

Answer 27

deep peroneal n.

Question 28

what are the two terminal branches of the deep peroneal n.?

Answer 28

the lateral and medial terminal branches of the deep peroneal n.

Question 29

what supplies the motor innervation to the extensor digitorum brevis ?

Answer 29

lateral terminal branch of the deep peroneal n.

Question 30

the a. running laterally with the lateral terminal branch of the deep peroneal n. is a branch off of what a.?

Answer 30

lateral tarsal branch OF the dorsalis pedis a.

Question 31

which branch of the deep peroneal a. reaches the first intermetatarsal space?

Answer 31

medial terminal branch

Question 32

the 2nd an 3rd dorsal digital n. are branches off of what n?

Answer 32

medial terminal branch of the deep peroneal n.

Question 33

the deep fascia is aka ?

Answer 33

crural fascia

Question 34

the superior and inferior extensor retinacula are thickenings of what?

Answer 34

crural fascia

Question 35

what retinaculum lies superior to the level of the malleoli and courses b/w the tibia and fibula?

Answer 35

superior extensor retinaculum

Question 36

what tendons pass under the superior extensor retinaculum?

Answer 36

``` 4 extensor digitorum longus extensor hallucis longus peroneus tertius tibialis anterior ```

Question 37

which retinaculum is described as a y-shaped band?

Answer 37

inferior extensor retinaculum

Question 38

the stem part of the 'y' retinaculum is know as what?

Answer 38

frondiform ligament

Question 39

where does the frondiform ligament attach?

Answer 39

lateral surface of the calcaneus at sinus tarsi and sinus canal

Question 40

the superomedial limb of inferior extensor retinaculum attaches where? inferomedial limb?

Answer 40

superior - medial malleolus | inferior - blends with deep fascia along medial side of foot at cuneonavicular jt

Question 41

how often is there a superolateral limb to the inferior extensor retinaculum?

Answer 41

25% if present it extends up to the lateral malleolus it found gives the inferior extensor retinaculum an X/cruciate shape

Question 42

what surround tendons of the extensor muscles?

Answer 42

synovial sheaths

Question 43

how many synovial sheaths can be found below the inferior extensor retinaculum?

Answer 43

3 1 - tibialis anterior tendon 1- extensor hallucis longus 1 - peroneus tertius and extensory digitorum longus

Question 44

how many tendons does the extensor digitorum brevis have?

Answer 44

3 to the 2nd, 3rd, and 4th toes at times the medial tendon has a separate belly called the extensor hallucis brevis

Question 45

The tendons of the extensor hallucis brevis and extensor digitorum brevis join what other tendons?

Answer 45

join the lateral side of the tendons of the extensor hallucis longus and extensor digitorum longus

Question 46

what is the continuation of the anterior tibial a. in the foot?

Answer 46

dorsalis pedis a.

Question 47

what a. is usually the first and largest branch of the dorsalis pedis?

Answer 47

lateral tarsal a. usually arises from the lateral side of the dorsalis pedis near the distal border of the inferior extensor retinaculum courses deep to extensor digitorum brevis m.

Question 48

the lateral tarsal a. has communicating branches with what a?

Answer 48

perforating branch of the peroneal a. also anastomoses with the terminal part of the arcuate a.

Question 49

the peroneal a. is a branch of what a.?

Answer 49

posterior tibial a.

Question 50

what are the 1-2 very small aa. that may be seen arising from the medial side of the dorsalis pedis as it courses over the navicular bone?

Answer 50

medial tarsal aa.

Question 51

what does the medial tarsal a. connect with?

Answer 51

medial malleolar rete (plexus of arteries superficial to the medial malleolar)

Question 52

the arcuate a. is a continuation of what a.?

Answer 52

dorsalis pedis

Question 53

is the arcuate a. superficial or deep to the extensor digitorum brevis and longus?

Answer 53

deep the arcuate a. arises near the base of the 2nd metatarsal and courses laterally, deep to the extensor digitorum longus and brevis

Question 54

which a. arise directly from the arcuate a.?

Answer 54

(3) 2nd, 3rd, and 4th dorsal metatarsal a.

Question 55

what supplies the dorsal interosseous mm?

Answer 55

dorsal metatarsal a. (course directly across the anterior surface of these m.)

Question 56

each dorsal metatarsal a gives rise to what a?

Answer 56

two dorsal digital arteries

Question 57

the dorsal digital aa. eventually anastomose with what aa?

Answer 57

proper plantar aa.

Question 58

which arteries originate from the plantar arch and perforate dorsally to join the proximal ends of the dorsal metatarsal arteries?

Answer 58

proximal/posterior perforating branches

Question 59

what arteries do the dorsal metatarsal aa receive at the distal end?

Answer 59

distal/anterior perforating branches | branches of the plantar metatarsal aa

Question 60

where can you find the distal perforating branches?

Answer 60

lateral sides of the tendons of the dorsal interossei m.

Question 61

when do the dorsal metatarsal arteries become known as the common dorsal digital aa?

Answer 61

after receiving the perforating branches

Question 62

two dorsal digital arteries arise from one artery known as what?

Answer 62

common dorsal digital arteries

Question 63

what are the two terminal branches of the dorsalis pedis artery?

Answer 63

first dorsal metatarsal a AND deep plantar a.

Question 64

the 1st dorsal digital artery arises from what a.?

Answer 64

1st dorsal metatarsal goes to the medial side of 1st toe

Question 65

which perforating branches does the 1st dorsal metatarsal a. receive?

Answer 65

only the distal perforating branch does not receive a proximal perforating branch since the deep plantar a. takes it place

Question 66

the 1st common dorsal digital a. is formed when?

Answer 66

1st dorsal metatasal a. is joined by a distal perforating branch

Question 67

what n. courses with the lateral tarsal a. to provide branches to extensor digitorum brevis m.?

Answer 67

lateral terminal branch of the deep peroneal n.

Question 68

the 1st common dorsal digital a. terminates into what?

Answer 68

2nd and 3rd dorsal digital a.

Question 69

what a. is found piercing through the interosseous membrane to gain access to the dorsal part of the foot?

Answer 69

perforating branch of the peroneal a. usually small but on occasion is lg and takes over the vascular supply of dorsal foot