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CT MSK 2 > Posterior Leg > Flashcards

Posterior Leg Flashcards

1
Q

Sustentaculum tali is found on the Calcaneus and is a shelf-like projection that supports superior tarsal and provides a groove for the tendon of which of the following muscles?

A. Extensor Hallucis Longus M.

B. Flexor Hallucis Longus M.

C. Tibialis Posterior M.

D. Plantaris M.

A

Flexor Hallucis Longus M.

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2
Q

Gluteus Maximus recieves blood from the Superficial Branch of the Superior Gluteal A.

A

Gluteus Maximus receives blood from the Superficial Branch of the Superior Gluteal A.

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3
Q

T/F: The Tibialis Posterior T. creates a sling across the bottom of the tarsals within the foot

A

True

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4
Q

A 19-yo male PT presents in the ER with extreme pain in his right leg after slamming it against a rock while inner-tubing down Boulder creek. The posterior tibial pulse is weak and his creatine kinase levels are elevated. The PT’s pain level increases when attempting to flex the toes. What emergency do you undertake?

A. Femoral to Femoral arterial shunt

B. Amputation

C. Deep Posterior fasciotomy

D. Lateral Compartment fasciotomy

A

Deep Posterior fasciotomy

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5
Q

What is the name of the thick fascial stocking that surrounds the leg and gives off septa that compartmentalizes the leg?

What are the compartments?

A

Crural Fascia

Posterior

Anterior

Lateral

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6
Q

The posterior compartment of the leg is divided into a Deep Posterior and Superficial Posterior compartments by which of the following?

A. Interosseous Membrane

B. Anterior Septum

C. Posterior Septum

D. Transverse Septum

A

Transverse Septum

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7
Q

Which of the following compartments of the leg is responsible for flexion?

A. Anterior

B. Lateral

C. Posterior

A

Posterior

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8
Q

What muscles are part of the superficial posterior compartment of the leg? (3)

A

Gastrocnemius M.

Soleus M.

Plantaris M.

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9
Q

What muscles are part of the Deep Posterior compartment of the leg? (4)

A

Popliteus M.

Flexor Hallucis Longus M.

Flexor Digitorum Longus M.

Tibialis Posterior M.

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10
Q

A 24-yo male is admitted to the ED after a car collision. Radiologic examination reveals a fracture at the junction of the middle and lower thirds of the femur. An MRI examination provides evidence that the popliteal vessels were injured when the distal fragment of the fracture was pulled posteriorly. Which of the following muscles is most likely to displace the distal fracture fragment?

A. Soleus

B. Gastrocnemius

C. Semitendinosus

D. Gracilis

E. Tibialis Anterior

A

Gastrocnemius

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11
Q

T/F: The medial head of the gastrocnemius is larger than the lateral head generally

A

True

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12
Q

What is the common insertion of the 3 muscles of the superficial posterior leg compartment?

(Gastrocnemius, Soleus, Plantaris Ms.)

A

Posterior surface of the calcneus via the Tendo Calcaneus

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13
Q

What structure does the Gastrocnemius originate from?

A. Medial/Lateral Femoral Condyle

B. Medial/Lateral Femoral Epicondyle

C. Soleal Line of Tibia

D. Head of Fibula (posteriorly)

E. Lateral Supracondylar Line

F. Medial Supracondylar Line

A

Medial/Lateral Femoral Condyle

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14
Q

What 2 structures does the Soleus originate from?

A. Medial/Lateral Femoral Condyle

B. Medial/Lateral Femoral Epicondyle

C. Soleal Line of Tibia

D. Head of Fibula (posteriorly)

E. Lateral Supracondylar Line

F. Medial Supracondylar Line

A

Soleal Line of Tibia

Head of Fibula (posteriorly)

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15
Q

What structure does the Plantaris M. originate from?

A. Medial/Lateral Femoral Condyle

B. Medial/Lateral Femoral Epicondyle

C. Soleal Line of Tibia

D. Head of Fibula (posteriorly)

E. Lateral Supracondylar Line

F. Medial Supracondylar Line

A

Lateral Supracondylar Line

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16
Q

All muscles of the superficial posterior compartment of the leg perform what action?

What additional action does the gastrocnemius perform?

A

Plantarflexion

Flex leg

17
Q

Fabella means bean in latin, and is a small sesamoid bone that may exists close to what muscles?

A. Medial Head of Gastrocnemius

B. Lateral Head of Gastrocnemius

C. Plantaris M.

D. Soleus

A

Lateral Head of Gastrocnemius

Note: stress fracture of the Fabella may accompany a total knee replacement

18
Q

What nerve supplies the muscles of the superficial and deep posterior compartment of the leg?

19
Q

Which of the following is the unusual trait of the Plantaris M.?

A. Contains an unusually high density of proprioceptice receptor end organs that make it seem like it is a proprioceptive organ for foot position

A

Contains an unusually high density of proprioceptice receptor end organs that make it seem like it is a proprioceptive organ for foot position

20
Q

Which of the following arteries is found superior to the heads of the gastrocnemius M.?

A. Superior Medial/Lateral Genicular As.

B. Inferior Medial Genicular A.

C. Inferior LAteral Genicular A.

D. Middle Genicular A.

A

Superior Medial/Lateral Genicular As.

21
Q

Which of the following arteries is found deep to the medial head of gastrocnemius M.?

A. Superior Medial/Lateral Genicular As.

B. Inferior Medial Genicular A.

C. Inferior LAteral Genicular A.

D. Middle Genicular A.

A

Inferior Medial Genicular A.

22
Q

Which of the following arteries is found deep to Plantaris M. and superficial to Popliteus M.

A. Superior Medial/Lateral Genicular As.

B. Inferior Medial Genicular A.

C. Inferior LAteral Genicular A.

D. Middle Genicular A.

A

Inferior Lateral Genicular A.

23
Q

What structure does the Popliteus M. originate from?

A. Posterior Tibia (inferior to soleal line)

B. Fibula (posteromedial surface)

C. Fibular (inferior 2/3rds of posterior portion)

D. Interosseous Membrane

A

Posterior Tibia (inferior to soleal line)

24
Q

What structure does the Flexor Hallucis Longus M. originate from?

A. Posterior Tibia (inferior to soleal line)

B. Fibula (posteromedial surface)

C. Fibular (inferior 2/3rds of posterior portion)

D. Interosseous Membrane

A

Fibular (inferior 2/3rds of posterior portion)

25
Q

What structure does the Flexor Digitorum Longus M. originate from?

A. Posterior Tibia (inferior to soleal line)

B. Fibula (posteromedial surface)

C. Fibular (inferior 2/3rds of posterior portion)

D. Interosseous Membrane

A

Posterior Tibia (inferior to soleal line)

26
Q

What 3 structures does the Tibialis Posterior M. originate from?

A. Posterior Tibia (inferior to soleal line)

B. Fibula (posterolateral surface)

C. Fibular (inferior 2/3rds of posterior portion)

D. Interosseous Membrane

E. Fibula (posteromedial surface)

A

Posterior Tibia (inferior to soleal line)

Interosseous Membrane

Fibula (posteromedial surface)

27
Q

Where does the Popliteus M. insert?

A. Medial Femoral Condyle and Lateral Meniscus

B. Lateral Femoral Condyle and Lateral Meniscus

C. Base of Distal Phalanx of 1st Digit

D. Base of Distal Phalanx for Digits 2-5

A

Lateral Femoral Condyle and Lateral Meniscus

28
Q

Where does the Flexor Hallucis Longus M. insert?

A. Medial Femoral Condyle and Lateral Meniscus

B. Lateral Femoral Condyle and Lateral Meniscus

C. Base of Distal Phalanx of 1st Digit

D. Base of Distal Phalanx for Digits 2-5

A

Base of Distal Phalanx of 1st Digit

29
Q

Where does the Flexor Digitorum Longus M. insert?

A. Medial Femoral Condyle and Lateral Meniscus

B. Lateral Femoral Condyle and Lateral Meniscus

C. Base of Distal Phalanx of 1st Digit

D. Base of Distal Phalanx for Digits 2-5

A

Base of Distal Phalanx for Digits 2-5

30
Q

The Tibilis Posterior M. inserts on 3 structures, what are they?

A

Navicular Tuberosity

Cuneiforms

Metatarsals 2-4

(Naval Cuties Meet 2-4)

31
Q

What is the deepest muscle of the deep posterior compartment of the leg?

A

Tibialis Posterior

32
Q

What action does the popliteus M. perform?

A. Plantarflexion

B. Flexion of 1st Digit

C. Flexion of Digits 2-5

D. Weakly flex and unlock knee by medially rotating femur on stationary tibia

E. Weakly flex and unlock knee by laterally rotating femur on stationary tibia

A

Weakly flex and unlock knee by laterally rotating femur on stationary tibia

33
Q

What action does the Flexor Hallucis Longus M. perform? (2)

A. Plantarflexion

B. Flexion of 1st Digit

C. Flexion of Digits 2-5

D. Weakly flex and unlock knee by medially rotating femur on stationary tibia

E. Weakly flex and unlock knee by laterally rotating femur on stationary tibia

A

Plantarflexion

Flexion of 1st Digit

34
Q

What action does the Flexor Digitorum Longus M. perform? (2)

A. Plantarflexion

B. Flexion of 1st Digit

C. Flexion of Digits 2-5

D. Eversion

E. Inversion

A

Plantarflexion

Flexion of Digits 2-5

35
Q

What action does the Tibialis Posterior M. perform? (2)

A. Plantarflexion

B. Flexion of 1st Digit

C. Flexion of Digits 2-5

D. Eversion

E. Inversion

A

Plantarflexion

Inversion

36
Q

Tom Dick a.n. Harry is a mneumonic used to determine the order of structures as they cross the medial ankle joint. What are these structures going from anterior to posterior?

A

Tibialis Posterior M.

Flexor Digitorum Longus M.

Posterior Tibial A.

Nerves

Flexor Hallucis Longus M.

37
Q

THe Tibial N. ends by dividing into what 2 branches after passing deep to the Flexor Retinaculum b/w the medial malleolus and calcaneus?

A

Medial and Lateral Plantar Ns.

38
Q

What is the largest branch of the Posterior Tibial A., that vascularizes the posterior and lateral leg compartments ?

A

Fibular A.

CT MSK 2 (7 decks)

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