Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Lower Limb Anatomy > Dorsum of Foot Lab > Flashcards

Dorsum of Foot Lab Flashcards

1
Q

Overlies shafts of the metatarsal bones

A

dorsal venous arch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Medially the dorsal venous arch joins ___ to form ___.

A

joins Medial dorsal digital vein of the great toe to form the medial marginal vein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Anterior to the medial malleolus, the medial marginal vein becomes the ____.

A

Great Saphenous Vein

NOTE: GSV begins anterior to the medial malleolus**

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Laterally the dorsal venous arch joins the ___ to form the ___.

A

Joins Lateral Dorsal digital vein of the 5th toe to form the lateral marginal vein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Inferior to the lateral malleolus, the lateral marginal vein becomes ___.

A

Small saphenous vein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Dorsal Metatarsal Veins

A
  • the 4 of them drain into the dorsal venous arch.
  • Located in metatarsal spaces
  • origin = dorsal digital veins of toes

** No 2 cadavers are alike in their venous distribution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Saphenous Nerve

A
  • sensory branch of the femoral nerve
  • follows great saphenous vein in leg on lateral side
  • anterior to medial malleolus
  • skin along medial side of foot innervated by this
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Sural Nerve

A
  • Inferior to lateral malleolus
  • follows to small saphenous vein
  • becomes the Lateral Dorsal cutaneous nerve of foot
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Lateral Dorsal cutaneous Nerve

A
  • from the Sural Nerve on lateral side
  • terminal part= 10th Dorsal digital nerve**
  • Occasionally can give rise or anastomose with intermediate dorsal cutaneous nerve
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Superficial Peroneal Nerve terminal branches _____

A

Intermediate dorsal cutaneous nerve

medial dorsal cutaneous nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Medial Dorsal cutaneous Nerve

A
  • communicates with saphenous nerve and medial terminal branch of deep peroneal
  • gives rise to one dorsal digital nerve (1st Dorsal Digital Nerve) and 1st Common Dorsal Digital Nerve
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

1st Dorsal Digital Nerve

A

Innervates medial side of great toe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

1st Common dorsal Digital Nerve

A

Courses to space between toes 2 and 3, where it divides into the 4th and 5th dorsal digital nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Intermediate Dorsal Cutaneous Nerve

A

Divides into 2nd and 3rd Common dorsal Digital nerves for intermetatarsal spaces 3 and 4

Each common divides to give two dorsal digital nerves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Deep Peroneal Nerve

A
  • courses into foot from below tendon of Extensor Hallucis Longus
  • terminal branches= Lateral and Medial Terminal Branches
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Lateral Terminal Branch of Deep Peroneal n

A

disappears below extensor digitorum brevis muscle to supply it with motor innervation**
- also supplies extensor halluces brevis m.

(artery running laterally with nerve is the lateral tarsal branch of dorsalis pedis artery)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Medial Terminal Branch of Deep Peroneal n.

A
  • follows dorsalis pedis a. and tendon of extensor hallucis longus to reach 1st intermetatarsal space
  • divides into: 2nd and 3rd Dorsal Digital nerves for adjacent sides of toes 1 and 2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Can the Intermediate dorsal cutaneous nerve be missing?

A

Yes!! In this case, the lateral dorsal cutaneous nerve supplies the skin normally innervated by the intermediate.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Thickenings of the crural fascia: ____.

A

Superior and Inferior Extensor Retinacula are thickenings of the deep fascia (crural fascia)

20
Q

Superior Extensor Retinaculum

A
  • Lies superior to level of malleoli and courses between tibia and fibula

Tendons passing below the retinaculum: Extensor Digitorum Longus, Extensor Hallucis Longus, Peroneus tertius, Tibialis anterior

21
Q

Inferior Extensor Retinaculum

A
  • Usually “Y” shaped band
    Stem: Frondiform Ligament- attached to lateral surface of calcaneus (sinus tarsi and sinus canal)
    Limbs (course medially): 
           Superomedial Limb- attaches medial malleolus
           Inferomedial Limb- blends with deep fascia at cuneonavicular joint

-Note: Can be cruciate “X” shaped
25% of time there is Superolateral Limb
Extends to lateral malleolus

22
Q

Synovial Sheaths

A
  • look for sheaths under the inferior extensor retinaculum
  • surround tendons of the extensor muscles
  • 3 sheaths, one for each tendon:
    1. Tibialis Anterior
    2. Extensor Hallucis Longus
    3. Common sheath to Peroneus Tertius and Extensor Digitorum Longus
23
Q

Tendons confined by:

A

Deep fibers of the superior extensor retinaculum serve to compartmentalize and confine the tendons

24
Q

Extensor Digitorum Brevis

A
  • tendons to medial 4 toes
  • medial or 1st tendon can have separate belly called Extensor Hallucis Brevis
  • rest of muscle )Extensor Digitorum Brevis to toes 2, 3, 4
  • Note: tendons join the lateral side of tendons of extensor halluces longus and extensor digitorum longus
25
Q

Dorsalis Pedis a.

A

Distal continuation of anterior tibial artery at ankle joint

26
Q

First and largest Branch of Dorsalis Pedis artery

A

Lateral Tarsal Artery

  • arises near distal border of inferior extensor retinaculum
  • courses inferolaterally deep to extensor digitorum brevis m. along with lateral terminal branch of deep peroneal n.

(may be a 2nd Lateral Tarsal a.)

  • communicating branches with perforating branch of peroneal artery (branch of posterior tibial artery)
27
Q

Arise from medial side of Dorsalis Pedis a.

A

1-2 medial tarsal arteries

  • usually pretty small
  • connection with medial malleolar rete (plexus of arteries superficial to medial malleolar)
28
Q

Arcuate Artery

A
  • branch of Dorsalis Pedis

- arises near base of 2nd metatarsal and courses laterally, deep to extensor digitorum longus and brevis

29
Q

Arise directly from Arcuate Artery

A

2nd, 3rd, 4th dorsal metatarsal arteries

30
Q

Dorsal metatarsal arteries

A
  • course across anterior surface of dorsal interossei muscles to supply them
  • each artery gives rise to 2 dorsal digital arteries
31
Q

Dorsal Digital arteries

A

Break up into numerous branches and anastomose with proper plantar arteries

32
Q

Proximal (posterior) perforating Branches

A
  • originate from plantar arch

- perforate dorsally to join proximal ends of dorsal metatarsal arteries

33
Q

Distal (anterior) perforating Branches

A
  • branches of plantar metatarsal arteries

- received by the dorsal metatarsal arteries

34
Q

Dorsal metatarsal arteries receive the Distal perforating branches and become:

A

Common Dorsal Digital arteries

Each common then divides at webbing of toes to form 2 dorsal digital arteries

35
Q

Dorsal Digital Arteries

A

1-10

1st Dorsal Digital is a branch from the 1st Dorsal Metatarsal a. (terminal branch of dorsalis pedis a. )

36
Q

Terminal Branches of Dorsalis Pedis a.

A

1st Dorsal Metatarsal a.

Deep Plantar a.

37
Q

1st Dorsal Metatarsal a.

A
  • gives off 1st dorsal digital artery–> to medial side of 1st toe
  • does not receive a proximal perforating branch
  • does receive a distal perforating branch—> then known as 1st Common Dorsal Digital a.
38
Q

Anastomoses with terminal part of arcuate artery and perforating branch of peroneal artery:

A

Lateral Tarsal Artery

39
Q

1st Common Dorsal Digital a. gives rise to:

A

2nd and 3rd dorsal digital arteries

40
Q

2nd Common Dorsal Digital a. gives rise to:

A

4th and 5th dorsal digital arteries

41
Q

3rd Common Dorsal Digital a. gives rise to:

A

6th and 7th dorsal digital arteries

42
Q

4th Common dorsal Digital a. gives rise to:

A

8th and 9th dorsal digital arteries

43
Q

Number of Proximal Perforating branches

A

3

44
Q

Number of Distal perforating Branches

A

4

45
Q

Perforating branch of peroneal a.

A

Pierces through interosseous membrane to gain access to dorsal part of foot.

  • usually small but can be large on occasion and take over vascular supply of dorsal foot.

Lower Limb Anatomy (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions