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

LEA Lateral Compartment of the Leg Flashcards

(74 cards)

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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
fibular synovial sheath begins
immediately superior to lateral malleolus (4cm above)
26
tendons share a sheath proximally as the pass
posterior to lateral malleolus in retromalleolar groove
27
the fibular synovial sheath divides at the __ and is separated by
fibular trochela; | fascial extensions of the inferior fibular retinaculum that attaches to peroneal trochlea
28
the fibular synovial sheath ends at
the level of the cuboid
29
the fibularis longus tendon has a synovial sheath as is passes
along the plantar foot
30
the fibularis longus tendon may or may not communicate with
the proximal fibular synovial sheath
31
fibular (personal retinacula)
thickening of crural fascia and deep fascia of the foot (pedis fascia)
32
superior fibular retinaculum is continuous with
superior extensor retinaculum (transverse crural ligament)
33
the superior fibular retinaculum attaches
posteroinferior lateral malleolus and retrotrochlear eminence
34
creates a pulley for tendons as they pass posterior to lateral malleolus
superior fibular reticulum attachment
35
inferior fibular retinaculum is continuous with
stem (frondiform ligament) of inferior extensor retincaulum
36
inferior fibular retinaculum attaches
sinus tarsiperoneal trochlea and lateral calcaneus
37
branches from fibular and anterior tibial arteries penetrate through
the anterior and posterior inter muscular septa
38
common fibular nerve roots
L4-S2
39
common fibular nerve is from
sciatic
40
common fibular nerve passes
around fibular neck
41
common fibular nerve enters lateral compartment by passing through
posterior intermuscular septum
42
common fibular nerve pierces
fibularis longus
43
common fibular nerve bifurcates
into terminal branches, deep fibular and superficial fibular nerves
44
superficial fibular nerve roots
L4-S1
45
superficial fibular nerve arises from
common fibular in the lateral compartment
46
superficial fibular nerve descends between ___ to supply lateral compartment muscles
the fibularis muscles
47
superficial fibular nerve pierces
anterolateral crural fascia in the distal 1/3 of leg
48
superficial fibular nerve supplies __ innervation to __
cutaneous; distal anterolateral leg, dorsum of foot
49
branches of superficial fibular nerve
medial dorsal cutaneous | intermediate dorsal cutaneous
50
medial dorsal cutaneous nerve supplies
cutaneous to medial hallux and adjacent 2nd and 3rd digit (branches will give rise to 3 digital branches)
51
intermediate dorsal cutaneous supplies
cutaneous innervation to adjacent 3rd and 4th, 4th and 5th digits. (branches gives rise to 4 digital branches)
52
superficial fibular nerve and its branches do not provide innervation to
lateral side of 5th digit
53
medial dorsal cutaneous nerve crosses ankle
centrally
54
intermediate dorsal cutaneous nerve is __ to lateral malleolus
anterior
55
supplies dorsomedial mid foot
medial dorsal cutaneous nerve and intermediate dorsal cutaneous nerve
56
branches of medial dorsal cutaneous
1. proper dorsal digital nerve 1 2. 1st common dorsal digital nerve 3. communicating branch of deep fibular nerve
57
proper dorsal digital nerve
dorsomedial hallux
58
1st common dorsal digital nerve branches
4th proper dorsal digital nerve | 5th proper dorsal digital nerve
59
4th proper dorsal digital nerve
dorsolateral 2nd toe
60
5th proper dorsal digital nerve
dorsomedial 3rd toe
61
branches of intermediate dorsal cutaneous nerve
2nd common dorsal digital nerve and 3rd common dorsal digital nerve
62
2nd common dorsal digital nerve
3rd intermetatarsal space
63
3rd common dorsal digital nerve
4th intermtatarsal space
64
2nd common dorsal digital nerve branches
6th and 7th proper dorsal digital nerves
65
3rd common dorsal digital nerve branches
8th and 9th dorsal digital nerves
66
6th proper dorsal digital nerve
dorsolateral 3rd toe
67
7th proper dorsal digital nerve
dorsomedial 4th toe
68
8th proper dorsal digital nerve
dorsolateral 4th toe
69
9th proper dorsal digital nerve
dorsomedial 5th toe
70
lateral dorsal cutaneous (after lateral malleolus) is a continuation of
sural
71
lateral dorsal cutaneous (after lateral malleolus) supplies
lateral foot border
72
lateral dorsal cutaneous branch
10th proper dorsal digital nerve (continuous)
73
10th proper dorsal digital nerve
dorsolateral 5th toe
74
Saphenous nerve supplies
medial midfoot/arch and medial ankle

Lower Extremity Anatomy (16 decks)

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