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MSK Test 2 Extra > Anterior and Lateral Leg > Flashcards

Anterior and Lateral Leg Flashcards

1
Q

What innervates the anterior leg?

A

Deep Fibular N.

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2
Q

What is the blood supply to the anterior leg?

A

Anterior tibial a.

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3
Q

What innervates the lateral leg?

A

Superficial Fibular N.

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4
Q

What is the blood supply to the lateral leg?

A

Fibular Branch of Posterior TIbial A.

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5
Q

Where does the fibular branch of the Posterior Tibial A. Come from?

A

Posterior Compartment

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6
Q

Tibialis Anterior:

Origin

A

Lateral condyle
Lateral surface of tibia
Interosseous membrane

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7
Q

Tibialis Anterior:

insertion

A

Medial cuneiform

Base of 1st metatarsal

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8
Q

Tibialis Anterior:

Innervation

A

Deep fibular n.

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9
Q

Tibialis Anterior:

Artery

A

Anterior tibial a.

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10
Q

Tibialis Anterior:

Action

A

Dorsiflexion

Inversion

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11
Q

Extensor Hallucis Longus:

Origin

A

Anterior surface of fibula

Interosseous membrane

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12
Q

Extensor Hallucis Longus:

Insertion

A

Dorsal aspect of base of distal phalanx of great toe

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13
Q

Extensor Hallucis Longus:

Innervation

A

Deep fibular n.

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14
Q

Extensor Hallucis Longus:

Artery

A

Anterior tibial a.

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15
Q

Extensor Hallucis Longus:

Action

A

Extend hallux

Dorsiflex ankle

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16
Q

Extensor Digitorum Longus:

origin

A

Lateral condyle of tibia

Medial surface of tibia

Interosseous membrane

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17
Q

Extensor Digitorum Longus:

Insertion

A

Middle and distal phalanges of lateral 4 digits

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18
Q

Extensor Digitorum Longus:

Innervation

A

Deep fibular N.

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19
Q

Extensor Digitorum Longus:

Artery

A

Anterior tibial a.

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20
Q

Extensor Digitorum Longus:

Action

A

Extends lateral 4 digits

Dorsiflexion of ankle

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21
Q

Fibularis Tertius:

Origin

A

Anterior surface of fibula

Interosseous membrane

22
Q

Fibularis Tertius:

Insertion

A

Dorsal base of 5th metatarsal

23
Q

Fibularis Tertius:

Innervation

A

Deep fibular n.

24
Q

Fibularis Tertius:

Artery

A

Anterior tibial a.

25
Q

Fibularis Tertius:

Action

A

Dorsiflexion

Eversion

26
Q

Fibularis Longus:

Origin

A

Lateral surface of fibula

27
Q

Fibularis Longus:

Insertion

A

Base of 1st metatarsal

Medial cuneiform

28
Q

Fibularis Longus:

Innervation

A

Superficial Fibular N.

29
Q

Fibularis Longus:

Artery

A

Fibular branch of posterior tibial a.

30
Q

Fibularis Longus:

Action

A

Eversion

Weak plantarflexion

31
Q

Fibularis Brevis:

Origin

A

Lateral surface of fibula

32
Q

Fibularis Brevis:

Insertion

A

Dorsal surface of tuberosity on lateral side of the base of 5th metatarsal

33
Q

Fibularis Brevis:

Innervation

A

Superficial Fibular N.

34
Q

Fibularis Brevis:

Artery

A

Fibular branch of Posterior Tibial A.

35
Q

Fibularis Brevis:

Action

A

Eversion

Weak plantar flexion

36
Q

Where does the Deep Fibular N. Com from?

A

Common fibular n. (One of the 2 terminal branches)

37
Q

What does the Deep Fibular N. Supply cutaneouslY?

A

Flip flop spot

38
Q

What does the Anterior Tibial A. Become?

A

Dorsalis pedis a.

39
Q

What do the tendons of the extensor Digitorum longus form?

What does it divide into?

A

Forms an Extensor Expansion two lateral slips

2 lateral slips to distal phalanx
1 central slip to middle phalanx

40
Q

What does the Fibularis Longus M. Use as a pulley?

A

Fibular Trochlea on Calcaneus and Cuboid Sulcus on Cuboid B.

41
Q

What two muscles will stop you from rolling your ankle?

A

Fibularis Longus and Brevis

42
Q

What is the most commonly injured lower extremity n.?

What does it wind around?

A

Common fibular n.

Fibular head

43
Q

Injury to the common fibular n results in what?

A

Loss of dorsiflexion and eversion
Foot drop
High steppage gait
Leg swung strongly and strikes w/ a clop
Loss of sensation along anterolateral leg and dorsum of foot

44
Q

What forms the extensor Retinaculum?

A

Crural Fascia

Thickens distally
(Prevents bowstringing during dorsiflexion)

45
Q

What is Leg Compartmental Syndromes?

What relieves it?

A

Caused by trauma that can lead to hemorrhage,edema, and inflammation

Intracompartmental pressure may lead to ischemia and permanent injury

Fasciotomy

46
Q

What causes shin splints?

A

Repetitive micro trauma to tibialis anterior

Overuse induces small tear to periosteum over tibia and/or tear to overlying deep fascia

Mild form of compartmental syndrome
Swelling of tibialis anterior due to repetitive ground reaction force

47
Q

Young parents were concerned that their 14 month old daughter had not yet begun walking. Their pediatrician reassured them, saying that one of the muscles of the leg, the fibularis (peroneus) tertius, had to complete its central neurologic development before the child could lift the outer corner of the foot and walk without stumbling over her toes.

a. Sural
b. Lateral plantar
c. Deep fibular 
d. Superficial fibular
e. Tibial
A

Deep fibular

48
Q

Lower limb angiography of an 82 yo woman reveals a possible cause for her limb pain during her workout routines int he health spa. The artery that was occluded is one that should have been demonstrable passing between the proximal part of the space between the tibia and fibula. which of the following arteries is most likely affected?

a. Deep femoral 
b. Popliteal
c. Posterior tibial (in the posterior compartment) 
d. Fibular
e. Anterior tibial
A

Posterior tibial

49
Q

A 22 yo male martial arts competitor was examined by the clinician because of pain and serious disability suffered from a kick to the side of his knee. Physical examination revealed a dark bruise just distal to the head of the fibula. Which of the following Ms. will most likely be paralyzed?

a. Tibialis anterior and extensor Digitorum longus
b. Tibialis posterior
c. Soleus and gastrocnemius
d. Plantaris and popliteus
e. Flexor Digitorum longus and flexor hallucis longus
A

Tibialis anterior and extensor Digitorum longus

50
Q

A 45 yo man is treated at the hospital after he fell from his bicycle. Radiologic exam reveals fracture both of the tibia and the fibula. On PE ,the patient has a foot drop, but normal eversion. Which of the following Ns. Is most likely injured?

a. Tibial 
b. Common fibular
c. Superficial fibular
d. Saphenous
e. Deep fibular
A

Deep fibular

51
Q

During the prep of an evening meal, a female medical student dropped a sharp, slender kitchen knife. The blade pierced the fist web space of her foot, resulting in numbness along adjacent sides of the 1st and 2nd toes. Which nerve was most likely injured?

a. Saphenous
b. Deep Fibular
c. Superficial fibular
d. Sural
e. Common fibular
A

Deep fibular

MSK Test 2 Extra (5 decks)

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