Leg, Ankle And Foot

Question 1

Tibialis anterior

402

Answer 1

O: lateral condyle and proximal half of tibia and interosseus membrane 
I: plantar surface of medial cuniform 
A: dorsiflexes the ankle 
-inverts foot
N: deep peroneal nerve L4-L5

Question 2

Extensor digitorum longus

403

Answer 2

O: lateral tibial condyle
I: middle and distal phalanges of digits 2-5, by 4 tendons to dorsal tendons
A: extends the 2nd through to 5th metatarsophalangeal and interphalangeal joints
N: deep peroneal nerve

Question 3

Extensor hallucis longus

404

Answer 3

O: middle of anterior surface of fibula and interosseus membrane
I: base of 1st distal phalanxes
A: extends 1st metatarsophalangeal and interphalangeal joints
-dorsiflexes the ankle
-inverts the foot
N: deep peroneal nerve

Question 4

Peroneus longus

405

Answer 4

O: head and lateral 2/3 of fibula 
I: lateral sides of the first metatarsal and medial cuniform
A: plantar flexes the ankle 
-everts the foot 
N: superficial peroneal nerve

Question 5

Gastrocnemius

408

Answer 5

O: medial head: posterior of medial femoral condyle
I: lateral head: posterior surface of lateral femoral condyle
I: posterior surface of calcaneous
A: plantar flexes the ankle
-flexes the knee
N: tibial nerve S1-S2

Question 6

Soleus

Answer 6

O: posterior surface of tibia and posterior head and proximal surface of the fibula
I: posterior surface of the calcaneus via Achilles’ tendon
A: plantar flexes the ankle
N: tibial nerve

Question 7

Tibialis posterior

411

Answer 7

O: lateral posterior tibia, proximal 2/3 of medial fibula and interosseus membrane
I: navicular tuberosity, cuniforms 1-3, cuboid, and base of metatarsals 2-4
A: plantar flexes the ankle and inverts the foot
N: tibial nerve

Question 8

Flexor digitorum longus

Pg 412

Answer 8

O: middle of posterior surface of tibia
I: base of distal phalanges of digits 2-5 by 4 tendons
A: flexes 2-5 metatarsophalangeal and interphalangeal joints
Plantar flexes the ankle
Inverts the foot
N: tibial nerve s2-s3

Question 9

Flexor hallucis longus

Pg 413

Answer 9

O: distal, posterior surface of fibula and interosseus membrane
I: base of first distal phalanx, plantar surface
A: flexes first metatarsophalangeal and interphalangeal joint
Plantar flexes ankle
Inverts foot
I: tibial nerve