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Lower Extremity Anatomy > LEA Lateral Compartment of the Leg > Flashcards

LEA Lateral Compartment of the Leg Flashcards

1
Q

the lateral compartment of the leg is formed from

A

the fibula and anterior/posterior intermuscular septum

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2
Q

muscles of the lateral compartment attach proximally to

A

lateral fibular shaft

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3
Q

tendons are visible at the

A

lateral ankle, posterior to lateral malleolus (retromalleolar groove)

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4
Q

lateral compartment muscle of the leg are __ and aid in ___

A

everters, plantarflexion

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5
Q

lateral compartment muscles are innervated by

A

superficial fibular nerve

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6
Q

blood supply to the lateral compartment muscles

A

perforating branches from fibular artery and anterior tibial

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7
Q

branches to the lateral muscles pierce the

A

intermuscular septum

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8
Q

there is no major artery located __

A

in the lateral compartment of the leg

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9
Q

fibularis longus origin

A

fibular head
proximal 1/2 of lateral fibular shaft
crural fascia

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10
Q

fibularis longus insertion

A
  • lateral/plantar aspect of medial cuneiform

- 1st metatarsal (tuberosity)

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11
Q

path of the fibularis longus

A
  • Posterior to lateral malleolus within fibular groove
  • deep to superior fibular retinaculum
  • inferior to peroneal (fibular) trochlea, deep to inferior fibular retinaculum,
  • fibular sulcus and groove of cuboid (inferior surface),
  • crosses sole of foot to insert on medial side
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12
Q

the fibular groove is converted to tunnel by

A

the long plantar ligament

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13
Q

function of the fibularis longus

A
  • eversion and plantar flexion
  • pronates subtalar and mid tarsal joints
  • helps support 1st metatarsal during propulsion
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14
Q

Fibularis Brevis origin

A

distal 1/2 of lateral fibular shaft and crural fascia

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15
Q

the Fibularis Brevis originates __ to the fibularis longus

A

medial and inferior

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16
Q

when Fibularis Brevis and Longus pass around the lateral malleolus, Fibularis Brevis is __

A

anterior

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17
Q

the insertion of the Fibularis Brevis

A

styloid process of 5th metatarsal

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18
Q

path of the Fibularis Brevis

A
  • Posterior to lateral malleolus (anterior to fibularis longus tendon)
  • Deep to superior fibular retinaculum
  • Superior to peroneal trochlea, deep to inferior fibular retinaculum
  • Heads anteriorly toward its insertion
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19
Q

Fibularis Brevis tendon is __ to Longus tendon at the ankle

A

anterior

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20
Q

the function of Fibularis Brevis

A

eversion and plantarflexion (pronation of subtler joint)

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21
Q

Peroneus (fibularis) quartus

A

common accessory muscle (10-26%)

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22
Q

origin of peroneus quartus

A

the muscle belly of either fibularis brevis or fibularis longus
AND lateral fibular shaft between origins of the fibularis longus and brevis

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23
Q

the insertion of peroneus quartus

A

cuboid, 5th met base

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24
Q

the peroneus quartus can cause

A

overcrowding of the retromalleolar region/fibular groove which can cause degradation/dislocation of fibularis brevis

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25
Q

fibular synovial sheath begins

A

immediately superior to lateral malleolus (4cm above)

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26
Q

tendons share a sheath proximally as the pass

A

posterior to lateral malleolus in retromalleolar groove

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27
Q

the fibular synovial sheath divides at the __ and is separated by

A

fibular trochela;

fascial extensions of the inferior fibular retinaculum that attaches to peroneal trochlea

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28
Q

the fibular synovial sheath ends at

A

the level of the cuboid

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29
Q

the fibularis longus tendon has a synovial sheath as is passes

A

along the plantar foot

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30
Q

the fibularis longus tendon may or may not communicate with

A

the proximal fibular synovial sheath

31
Q

fibular (personal retinacula)

A

thickening of crural fascia and deep fascia of the foot (pedis fascia)

32
Q

superior fibular retinaculum is continuous with

A

superior extensor retinaculum (transverse crural ligament)

33
Q

the superior fibular retinaculum attaches

A

posteroinferior lateral malleolus and retrotrochlear eminence

34
Q

creates a pulley for tendons as they pass posterior to lateral malleolus

A

superior fibular reticulum attachment

35
Q

inferior fibular retinaculum is continuous with

A

stem (frondiform ligament) of inferior extensor retincaulum

36
Q

inferior fibular retinaculum attaches

A

sinus tarsiperoneal trochlea and lateral calcaneus

37
Q

branches from fibular and anterior tibial arteries penetrate through

A

the anterior and posterior inter muscular septa

38
Q

common fibular nerve roots

A

L4-S2

39
Q

common fibular nerve is from

A

sciatic

40
Q

common fibular nerve passes

A

around fibular neck

41
Q

common fibular nerve enters lateral compartment by passing through

A

posterior intermuscular septum

42
Q

common fibular nerve pierces

A

fibularis longus

43
Q

common fibular nerve bifurcates

A

into terminal branches, deep fibular and superficial fibular nerves

44
Q

superficial fibular nerve roots

A

L4-S1

45
Q

superficial fibular nerve arises from

A

common fibular in the lateral compartment

46
Q

superficial fibular nerve descends between ___ to supply lateral compartment muscles

A

the fibularis muscles

47
Q

superficial fibular nerve pierces

A

anterolateral crural fascia in the distal 1/3 of leg

48
Q

superficial fibular nerve supplies __ innervation to __

A

cutaneous; distal anterolateral leg, dorsum of foot

49
Q

branches of superficial fibular nerve

A

medial dorsal cutaneous

intermediate dorsal cutaneous

50
Q

medial dorsal cutaneous nerve supplies

A

cutaneous to medial hallux and adjacent 2nd and 3rd digit (branches will give rise to 3 digital branches)

51
Q

intermediate dorsal cutaneous supplies

A

cutaneous innervation to adjacent 3rd and 4th, 4th and 5th digits. (branches gives rise to 4 digital branches)

52
Q

superficial fibular nerve and its branches do not provide innervation to

A

lateral side of 5th digit

53
Q

medial dorsal cutaneous nerve crosses ankle

A

centrally

54
Q

intermediate dorsal cutaneous nerve is __ to lateral malleolus

A

anterior

55
Q

supplies dorsomedial mid foot

A

medial dorsal cutaneous nerve and intermediate dorsal cutaneous nerve

56
Q

branches of medial dorsal cutaneous

A
  1. proper dorsal digital nerve 1
  2. 1st common dorsal digital nerve
  3. communicating branch of deep fibular nerve
57
Q

proper dorsal digital nerve

A

dorsomedial hallux

58
Q

1st common dorsal digital nerve branches

A

4th proper dorsal digital nerve

5th proper dorsal digital nerve

59
Q

4th proper dorsal digital nerve

A

dorsolateral 2nd toe

60
Q

5th proper dorsal digital nerve

A

dorsomedial 3rd toe

61
Q

branches of intermediate dorsal cutaneous nerve

A

2nd common dorsal digital nerve and 3rd common dorsal digital nerve

62
Q

2nd common dorsal digital nerve

A

3rd intermetatarsal space

63
Q

3rd common dorsal digital nerve

A

4th intermtatarsal space

64
Q

2nd common dorsal digital nerve branches

A

6th and 7th proper dorsal digital nerves

65
Q

3rd common dorsal digital nerve branches

A

8th and 9th dorsal digital nerves

66
Q

6th proper dorsal digital nerve

A

dorsolateral 3rd toe

67
Q

7th proper dorsal digital nerve

A

dorsomedial 4th toe

68
Q

8th proper dorsal digital nerve

A

dorsolateral 4th toe

69
Q

9th proper dorsal digital nerve

A

dorsomedial 5th toe

70
Q

lateral dorsal cutaneous (after lateral malleolus) is a continuation of

A

sural

71
Q

lateral dorsal cutaneous (after lateral malleolus) supplies

A

lateral foot border

72
Q

lateral dorsal cutaneous branch

A

10th proper dorsal digital nerve (continuous)

73
Q

10th proper dorsal digital nerve

A

dorsolateral 5th toe

74
Q

Saphenous nerve supplies

A

medial midfoot/arch and medial ankle

Lower Extremity Anatomy (16 decks)

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