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Lower Extremity Anatomy > Dorsum of the Foot > Flashcards

Dorsum of the Foot Flashcards

(68 cards)

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1
Q

Muscles of the dorsum of the foot

A
  • Extensor digitorum brevis

- Extensor hallucis brevis

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2
Q

Extensor digitorum brevis origin

A
  • Sinus tarsi
  • Superolateral calcaneus
  • Interosseous talocalcaneal ligament
  • Cruciate crural ligament
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3
Q

Extensor digitorum brevis insertion

A
  • Lateral aspect of EDL tendons 2-4
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4
Q

Extensor digitorum brevis innervation

A
  • Lateral terminal branch of deep fibular
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5
Q

Extensor digitorum brevis blood supply

A
  • Lateral tarsal artery
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6
Q

Extensor digitorum brevis function

A
  • Dorsiflex toes 2-4
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7
Q

Extensor hallucis brevis

A
  • Tendon crosses dorsal to dorsalis pedis artery
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8
Q

Extensor hallucis brevis origin

A
  • Sinus tarsi
  • Superolateral calcaneus
  • Interosseous talocalcaneal ligament
  • Cruciate crural ligament
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9
Q

Extensor hallucis brevis insertion

A
  • Dorsal aspect of proximal phalanx of hallux
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10
Q

Extensor hallucis brevis innervation

A
  • Lateral terminal branch of deep fibular
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11
Q

Extensor hallucis brevis blood supply

A
  • Lateral tarsal artery
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12
Q

Extensor hallucis brevis function

A
  • Dorsifelx hallux
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13
Q

Arteries of dorsum of foot

A
  • Dorsalis pedis

- Dorsal metatarsal arteries

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14
Q

Dorsalis pedis artery

A
  • Continuation of anterior tibial artery

- Can arise from the perforating fibular artery (variation)

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15
Q

Dorsalis pedis location

A
  • Between the tendons of EHL and EDL (lateral to EHL)

- Deep to muscles/tendons, cruciate crural ligament (inferior ext retinaculum)

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16
Q

Branches of dorsalis pedis artery

A
  • Medial/lateral tarsal arteries
  • Arcuate artery
  • 1st dorsal metatarsal (terminal branch)
  • Deep plantar artery (terminal branch)
  • Artery of the sinus tarsi (sometimes)
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17
Q

Lateral tarsal artery

A
  • Can be more than 1

- Deep to EDB & EHB

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18
Q

Lateral tarsal artery supplies

A
  • Bones, joints, and ligaments that it passes by
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19
Q

Lateral tarsal artery anastomoses with

A
  • Lateral malleolar plexus
  • Perforating fibular
  • Arcuate
  • Lateral plantar
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20
Q

Medial tarsal artery

A
  • A couple of small branches
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21
Q

Medial tarsal artery supplies

A
  • Bones, joints, ligaments that it passes
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22
Q

Medial tarsal artery anastomoses with

A
  • Medial malleolar network

- Medial plantar artery

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23
Q

Arcuate artery (much varation)

A
  • Passes laterally across met bases

- Gives off 2-4 metatarsal arteries

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24
Q

If arcuate artery is absent

A
  • Lateral tarsal artery can take over area
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25
Deep plantar artery (terminal branch) pathway
- Passes through proximal end of intermetatarsal space
26
Deep plantar artery (terminal branch) anastomoses with
- Lateral plantar artery on plantar side of foot
27
Artery to sinus tarsi arises from the anastomotic connection with
- Lateral tarsal artery | - Perforating fibular artery
28
Dorsal metatarsal arteries are found in
- Intermetatarsal space on top of the dorsal interossei
29
Branches of 1st Dorsal metatarsal (terminal branch of dorsalis pedis)
- 1st dorsal digital artery (medial 1st toe) - 2nd dorsal digital artery (lateral 1st toe) - 3rd dorsal digital artery (medial 2nd toe) - Distal perforator (anastomosis with 1st plantar metatarsal) - Nutrient artery to 1st metatarsal
30
Branches from arcuate artery
- 2nd, 3rd, and 4th dorsal metatarsal | - Proper dorsal digital artery of 5th digit
31
2nd dorsal metatarsal artery gives off
- 4th dorsal digital artery (lateral 2nd toe) - 5th dorsal digital artery (medial 3rd toe) - Proximal and distal perforators
32
3rd dorsal metatarsal artery (from arcuate artery) gives off
- 6th dorsal digital artery (lateral 3rd toe) - 7th dorsal digital artery (medial 4th toe) - Proximal and distal perforators
33
4th dorsal metatarsal artery (from arcuate artery) gives off
- 8th dorsal digital artery (lateral 4th toe) - 9th dorsal digital artery (medial 5th toe) - Proximal and distal perforators
34
Proper dorsal digital artery of 5th digit gives off
- 10th dorsal digital artery - Lateral side of 5th toe - Can branch off 4th metatarsal artery or arcuate artery
35
The perforating arteries communicate with
- Plantar metatarsal arteries
36
Perforating arteries location
- Proximal located around met base | - Distal around MPJ
37
Plantar arteries can be a major source of
- Dorsal metatarsal arteries
38
Common fibular nerve (L4-S2) pathway
- Passes around fibular neck - Enters lateral compartment via posterior intermuscular septum - Bifurcates into terminal branches
39
Common fibular nerve (L4-S2) terminal branches
- Deep fibular nerve | - Superficial fibular nerve
40
Common fibular nerve (L4-S2) arises from
- Sciatic nerve
41
Anterior and lateral compartment, dorsum of the foot nerve supply (names)
- Common fibular (L4-S2) - Medial/lateral terminal branches of deep fibular nerve - Superficial fibular nerve (L4-S1)
42
Lateral terminal branch of deep fibular nerve innervates
- EHB - EDB - Joints of lateral foot
43
Medial terminal branch of deep fibular nerve communicates with
- Superficial fibular nerve | - (communicating branch of superficial fibular nerve)
44
Medial terminal branch of deep fibular nerve innervates
- 1st dorsal interossei muscle | - Joints of medial foot
45
Branches of medial terminal branch
- Proper dorsal digital nerve 2 | - Proper dorsal digital nerve 3
46
Proper dorsal digital nerve 2
- Cutaneous innervation of dorsolateral hallux
47
Proper dorsal digital nerve 3
- Cutaneous innervation of dorsomedial 2nd toe
48
Injury to Deep fibular nerve can result in
- Footdrop (increased tripping with gait) - Weak toe extension - Weak ankle dorsiflexion - Steppage gait - Altered sensation 1st web space
49
Superficial fibular nerve (L4-S1) | arises from
- Common fibular in the lateral compartment
50
Superficial fibular nerve (L4-S1) pathway
- Descends between the fibularis muscles | - Pierces anterolateral crural fascia in the distal 1/3 of leg
51
Superficial fibular nerve (L4-S1) | muscular innervation
- Lateral compartment muscles | - (Descends between fibularis muscles)
52
Superficial fibular nerve (L4-S1) | cutaneous innervation
- Distal anterolateral leg - Dorsum of foot - (Pierces anterolateral crural fascia in distal 1/3 of leg)
53
Branches of the superficial fibular nerve (L4-S1)
- Medial dorsal cutaneous | - Intermediate dorsal cutaneous
54
Medial dorsal cutaneous nerve innervates
- Medial hallux - Adjacent 2nd and 3rd digit - Branches will give rise to 3 digital branches
55
Intermediate dorsal cutaneous nerve innervates
- Adjacent 3rd and 4th, 4th and 5th digits - Branches will give rise to 4 digital branches - Lateral ankle - (NOT the lateral side of the 5th digit)
56
Injury to superficial fibular nerve may be caused by
- Chronic inversion ankle sprains
57
Injury to superficial fibular nerve (chronic inversion ankle sprains) symptoms
- Loss of eversion | - Altered sensation dorsum of foot
58
Medial dorsal cutaneous (crosses ankle centrally) supplies
- Dorsomedial midfoot
59
Branches of medial dorsal cutaneous
- P-roper dorsal digital nerve 1 (dorsomedial hallux) 1st common dorsal digital nerve (2nd intermetatarsal space) - 4th proper dorsal digital nerve (dorsolateral 2nd toe) - 5th proper dorsal digital nerve (dorsomedial 3rd toe) - Communicating branch to deep fibular nerve
60
Intermediate dorsal cutaneous nerve (anterior to lateral malleolus) supplies
- Dorsolateral midfoot
61
Branches of intermediate dorsal cutaneous nerve
- 2nd common dorsal digital nerve (3rd intermetatarsal space) - 6th proper dorsal digital nerve (dorsolateral 3rd toe) - 7th proper dorsal digital nerve (dorsomedial 4th toe) - 3rd common dorsal digital nerve (4th intermetatarsal space) - 8th proper dorsal digital nerve (dorsolateral 4th toe) - 9th proper dorsal digital nerve (dorsomedial 5th toe)
62
Lateral dorsal cutaneous (after lateral malleolus)
- Continuation of sural | - Supplies lateral foot border
63
Branches of lateral dorsal cutaneous
- 10th proper dorsal digital nerve (dorsolateral 5th toe) | - Continuation of lateral dorsal cutaneous
64
Saphenous nerve supplies
- Medial midfoot/arch | - Medial ankle
65
Superior leg (relationships)
- Anterior tibial artery and deep fibular nerve are between TA and EDL
66
Inferior leg (relationships)
- Anterior tibial artery and deep fibular nerve are between TA and EXL
67
Distal to ankle joint (relationships)
- Dorsalis pedis and deep fibular nerve are between EHL and EDL
68
Medial terminal branch of deep fibular nerve pathway
- Follows dorsalis pedis and 1st dorsal metatarsal arteries

Lower Extremity Anatomy (35 decks)

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