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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
Fibularis Tertius: | Action
Dorsiflexion | Eversion
26
Fibularis Longus: | Origin
Lateral surface of fibula
27
Fibularis Longus: | Insertion
Base of 1st metatarsal Medial cuneiform
28
Fibularis Longus: | Innervation
Superficial Fibular N.
29
Fibularis Longus: | Artery
Fibular branch of posterior tibial a.
30
Fibularis Longus: | Action
Eversion Weak plantarflexion
31
Fibularis Brevis: | Origin
Lateral surface of fibula
32
Fibularis Brevis: | Insertion
Dorsal surface of tuberosity on lateral side of the base of 5th metatarsal
33
Fibularis Brevis: | Innervation
Superficial Fibular N.
34
Fibularis Brevis: | Artery
Fibular branch of Posterior Tibial A.
35
Fibularis Brevis: | Action
Eversion Weak plantar flexion
36
Where does the Deep Fibular N. Com from?
Common fibular n. (One of the 2 terminal branches)
37
What does the Deep Fibular N. Supply cutaneouslY?
Flip flop spot
38
What does the Anterior Tibial A. Become?
Dorsalis pedis a.
39
What do the tendons of the extensor Digitorum longus form? | What does it divide into?
Forms an Extensor Expansion two lateral slips 2 lateral slips to distal phalanx 1 central slip to middle phalanx
40
What does the Fibularis Longus M. Use as a pulley?
Fibular Trochlea on Calcaneus and Cuboid Sulcus on Cuboid B.
41
What two muscles will stop you from rolling your ankle?
Fibularis Longus and Brevis
42
What is the most commonly injured lower extremity n.? | What does it wind around?
Common fibular n. | Fibular head
43
Injury to the common fibular n results in what?
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
What forms the extensor Retinaculum?
Crural Fascia | Thickens distally (Prevents bowstringing during dorsiflexion)
45
What is Leg Compartmental Syndromes? What relieves it?
Caused by trauma that can lead to hemorrhage,edema, and inflammation Intracompartmental pressure may lead to ischemia and permanent injury Fasciotomy
46
What causes shin splints?
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
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
Deep fibular
48
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
Posterior tibial
49
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
Tibialis anterior and extensor Digitorum longus
50
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
Deep fibular
51
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
Deep fibular

MSK Test 2 Extra (5 decks)

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