Leg

Question 1

Describe the organization of the talocrural fascia?

Answer 1

Superior extensor retinaculum
Inferior extensor retinaculum
Superior fibular retinaculum
Inferior fibular retinaculum
Flexor retinaculum

Question 2

From which parts of the talocrural fascia does the extensor retinaculum arise?

Answer 2

Superior Extensor retinaculum (distal tibia to distal fibula)
Inferior Extensor Retinaulum (calcaneus to navicular & med. malleolus)

Question 3

Name the attachments of the superior fibular retinaculum?

Answer 3

Lateral malleolus to calcaneus

Question 4

Name the attachments of the inferior fibular retinaculum?

Answer 4

inferior extensor retinaculum to calcaneus

Question 5

Name the attachments of the Flexor retinaculum?

Answer 5

Medial malleolus to calcaneus (forms tarsal tunnel)

Question 6

Describe the actions, contents, innervation, and blood supply of the Anterior Compartment of the Leg

Answer 6

Act: Ankle dorsiflexion, inversion, and toe extension
Mm: Tibialis anterior, extensor hallucis longus, extensor digitorum longus, fibularis tertius
I: Deep fibular n.
Blood supply by anterior tibial a.

Question 7

Describe the actions, contents, innervation, and blood supply of the Lateral Compartment of the Leg

Answer 7

Act: Eversion, plantar flexion
Mm: Fibularis longus & brevis
I: Superficial fibular n.
Blood supply by fibular a.

Question 8

Describe the actions, contents, innervation, and blood supply of the Superficial Posterior Compartment of the Leg

Answer 8

Act: Plantarflexion & knee flexion
Mm: Gastrocnemius, Soleus, Plantaris
I: Tibial n.
Blood supply by posterior tibial a.

Question 9

Describe the actions, contents, innervation, and blood supply of the Deep Posterior Compartment of the Leg

Answer 9

Act: Ankle plantar flexion & inversion, Toe & Knee flexion
Mm: flexor digitorum longus, flexor hallucis longus, tibialis posterior
I: Tibial n.
Blood supply by posterior tibial a.

Question 10

Describe the path of the Tibial Nerve

Answer 10

Tibial n. splits w/ Common Fibular from Sciatic n. @ popliteal fossa
Joins popliteal a. & v.
Continues with posterior tibial a.
Gives off Sural n. branch
Splits into Lateral & Medial Plantar nn. in foot, distal to tarsal tunnel

Question 11

Identify the muscular branches of the Tibial n.?

Answer 11

Lateral Plantar n.
Medial Plantar n.

Question 12

Describe the path of the Common Fibular Nerve

Answer 12

Common fibular n. splits off of Sciatic n. w/ Tibial n. @ popliteal fossa
Curves lateral to the neck of fibula
Dives deep to fibularis longus m.
Bifurcates into Deep Fibular and Superficial Fibular nn.

Question 13

Identify the muscular branches of the Common Fibular n.?

Answer 13

Deep Fibular n.
Superficial Fibular n.

Question 14

P, D, A, I Extensor digitorum longus

Answer 14

P: lateral tibial condyle, proximal 3/4th of fibular & crural interosseus membrane
D: dorsal digital expansions of digits 2-5
A: dorsiflexes ankle & extends digits 2-5 (IP&MP)
I: deep fibular n. (L4-S1)

Question 15

P, D, A, I Extensor hallucis longus

Answer 15

P: middle 1/2 of fibular surgace & crural interosseous membrane
D: distal phalangeal base of 1st digit
A: dorsiflex ankle & extend 1st digit (MP & IP)
I: Deep fibular n. (L4-S1)

Question 16

P, D, A, I Fibularis tertius

Answer 16

P: distal fibula and crural interosseous membrane
D: base of 5th metatarsal
A: dorsiflexes ankle & everts foot
I: deep fibular n. (L4-S1)

Question 17

P, D, A, I Tibialis anterior

Answer 17

P: lateral condyle and proximal 2/3rds of lateral tibial surface & crural interosseus membrane
D: medial cuneifrom & adjacent 1st metatarsal
A: dorsiflex ankle & invert foot
I: deep fibular n. (L4-S1)

Question 18

P, D, A, I Fibularis Longus

Answer 18

P: head & proximal 2/3rds of fibula
D: lateral aspects of 1st metatarsal & adjacent medial cuneiform
A: everts foot, plantar flexes ankle, & depresses 1st metatarsal head
I: superficial fibular n. (L4-S1)

Question 19

P, D, A, I Fibularis Brevis

Answer 19

P: distal 2/3 fibula
D: lateral base of 5th metatarsal
A: everts foot, plantar flexes ankle
I: superficial fibular n. (L4-S1)

Question 20

P, D, A, I Flexor digitorum longus

Answer 20

P: Posterior tibia distal to soleal line
D: plantar surface of distal phalangeal bases
A: plantar flexes ankle & flexes digits 2-5 (MP & IP)
I: tibial n. (L5-S2)

Question 21

P, D, A, I Flexor hallucis longus

Answer 21

P: distal 2/3 posterior fibula & crural interosseous membrane
D: plantar aspect of distal phalangeal base of 1st digit
A: plantar flexes ankle & flexes 1st digit (MP & IP)
I: tibial n. (L5-S2)

Question 22

P, D, A, I Gastrocnemius

Answer 22

P: posterior aspect of femoral condyles and joint capsule
D: posterior calcaneal surface
A: flexes knee & plantar flexes ankle
I: tibial n. (S1-S2)

Question 23

P, D, A, I Plantaris

Answer 23

P: lateral supracondylar line
D: posterior calcaneal surface
A: flexes knee & plantarflexes ankle
I: tibial n. (L4-S1)

Question 24

P, D, A, I Popliteus

Answer 24

P: lateral femoral condyle and oblique popliteal lig
D: soleal line of tibia
A: medial rotation of tibia & knee flexion (NWB) or lateral rotation of femur & knee flexion “unlocks knee” (WB)
I: tibial n. (L4-S1)

Question 25

P, D, A, I Soleus

Answer 25

P: posterior aspect of head & proximal 1/4 fibula & soleal line
D: posterior calcaneal surface
A: plantar flexes ankle
I: tibial n. (L5-S2)

Question 26

P, D, A, I Tibialis posterior

Answer 26

P: crural interosseus membrane, lateral tibial surface & medial fibular
D: Navicular, medial & intermediate cuneiforms, bases of metatarsals 2-4
A: inverts foot & plantar flexes ankle
I: tibial n. (L4-S1)