Anterior Fasial compartment Of Leg

Question 1

What is the mnemonic for the anterior fascial compartment of the leg?

Answer 1

Poor Tom, Exausted Drained Lethargic , Exaserbated Haggard Limp, Tuckered & Annoyed he…
( Peroneus Tertius, Extensor Digitorum Longus, Extensor Hallucis Longus, Tibialis Anterior

Question 2

What muscles make up the anterior compartment of the leg?

Answer 2

1.) Peroneus tertius
2.) Extensor digitorum Longus
3.) extensor hallucis longus
4.) Tibialis anterior

Question 3

What are the origins and insertions for the anterior compartment of the leg?

Answer 3

1.) Peroneus tertius
O: Shaft of fibula (lower 1/3)+
Interosseus membrane
I: Base off 5th Metatarsal

2.) EDL
O: shaft of fibula (upper 2/3)+
Tibia (lateral condyle)+
Interosseus membrane
I: Extensor expansions of digits 2-5 into bases of middle and distal phalanges

3.) EHL
O: shaft of fibula (middle1/2)+
Interosseus membrane
I: Big toe ( base of distal phalanx)

4.) Tibialis Anterior
O: shaft of tibia (lateral condyle and upper 1/2 of lateral surface)+
Interosseus membrane
I: Medial cuneiform+
Base of 1st metatarsal ( plantar surface)

Question 4

What Nerve/s innervate the anterior compartment of the leg?

Answer 4

1.) Deep peroneal Nerve

Question 5

What muscles make up the lateral fascial compartment of the leg?

Answer 5

1.) Peroneus longus
2.) Peroneus brevis

Question 6

What nerve/s innervate the lateral fascial compartment of the leg?

Answer 6

1.) superficial peroneal nerve

Question 7

What are the origins and insertions for the lateral leg muscles?

Answer 7

1.) Peroneus longus
O: Fibula ( head and upper 2/3 of the lateral surface)
I: Medial cuneiform (lateral side) +
Base of 1st metatarsal

2.) Peroneus brevis
O: Fibula (lower 2/3 of the lateral surface)
I: tuberosity of the 5th metatarsal

Question 8

What 3 joints do the 2 lateral leg muscles cross?

Answer 8

1.) Subtalar joint
2.) Transverse Tarsals
3.) Ankle

Question 9

What 2 actions do the lateral leg muscles do?

Answer 9

1.) Eversion ( subtalar and transverse tarsal joints)
2.) the ankle assists with Plantar flexion

Question 10

What is the only muscle of the lateral leg compartment to insert onto a cuneiform?

Answer 10

Peroneus Longus has a partial insertion onto the lateral side of the medial cuneiform

Question 11

Both of the lateral leg muscles originate off of what structure?

Answer 11

The fibula.
They both originate off the lateral surface
( PL= upper 2/3, PB= lower 2/3)

Question 12

What lateral leg muscle also originates off of the head of the fibula?

Answer 12

Peroneus longus originates off of the head and upper 2/3 of the lateral surface of fibula

Question 13

What metatarsals do the lateral leg muscles insert onto?

Answer 13

Peroneus longus inserts onto the base of the 1st
Peroneus brevis inserts on the tuberosity of the 5th

Question 14

What are the muscles of the superficial posterior leg compartment?

Answer 14

1.) Gastrocnemius
2.) Plantaris
3.) Soleus

Question 15

Where do all 3 of the superficial posterior leg muscles insert?

Answer 15

The calcaneus.
Gastrocnemius and Soleus have a shared insertion via the Achilles,
Plantaris is just medial

Question 16

What actions do all 3 of the superficial posterior leg muscles have in common?

Answer 16

Plantar flexion

Question 17

All 3 superficial posterior leg muscles cross the ankle joint,
1.) what 2 muscles also cross the knee?
2.) What action do these muscles do?

Answer 17

1.) gastrocnemius + Plantaris
2.) assist with knee flexion

Question 18

What are the origins and insertions for the superficial posterior leg muscles?

Answer 18

1.) Gastrocnemius
O: Lateral head= lateral femoral condyle
Medial head= medial femoral condyle +
Popliteal surface
: calcaneus via Achilles tension

2.) Plantaris
O: supracondylar ridge of femur
I: calcaneus ( just medial to the Achilles tendon)

3.) Soleus
O: Shaft of fibula ( upper 1/3 and posterior surface of head)+
Soleal line+
Tendinous arch
I: Calcaneus (via Achilles tendon)

Question 19

What muscles make up the deep posterior fascial compartment of the leg?

Answer 19

1.) popliteus
2.) Flexor digitorum longus
3.) Tibialis posterior
4.) flexor hallucis longus

Question 20

What air the origins and insertions for the deep posterior compartment of the leg?

Answer 20

1.) Popliteus
O: lateral femoral condyle +
Lateral meniscus of knee
I: Proximal tibia ( posterior surface above the soleal line)

2.) FDL
O: Tibia ( middle 1/3 of posterior surface below the soleal line)
I: lateral 4 digits ( bases of distal phalanges on plantar surface)

3.) Tibialis posterior
O: Tibia ( upper posterior surface)+
Interosseus membrane+
Fibula (upper 1/2 of posterior surface)
I: Navicular+
Cuboid+
Cuneiforms+
Bases of MT 2,3,4

4.) FHL
O: shaft of fibula (inferior 2/3 of posterior)+
Interosseous membrane
I: Big toe ( base of distal phalanx)

Question 21

What nerve/s innervate both the superficial and deep posterior compartments of the leg?

Answer 21

Tibial Nerve