Week 4

Question 1

What is the origin of the Tibialis Anterior?

Answer 1

Anterior proximal tibia, crural fascia (lateral tibial condyle, proximal 2/3 of anteriolateral surface of tibia and interosseous membrane)

Question 2

What is the insertion of the Tibialis Anterior?

Answer 2

Medial cuneiform and base of 1st metatarsal

Question 3

What is the action of the Tibialis Anterior?

Answer 3

Dorsiflexion and inversion of ankle

Question 4

What is the innervation of the Tibialis Anterior?

Answer 4

Deep peroneal (fibular) nerve

Question 5

What muscles make up the stirrup of the foot?

Answer 5

Tibialis anterior and fibularis longus

Question 6

What are shinsplints often due to?

Answer 6

Tight or damaged anterior tibialis

Question 7

What is the origin of the Extensor Digitorum Longus?

Answer 7

Proximal 2/3 of fibula, interosseous membrane, lateral condyle of tibia

Question 8

What is the insertion of the Extensor Digitorum Longus?

Answer 8

Dorsal surface of digits 2-5 (via dorsal expansion to middle and distal phalanges)

Question 9

What is the action of the Extensor Digitorum Longus?

Answer 9

Extension of digits 2-5 (at MTP and IP joints), dorsiflexion and eversion of foot

Question 10

What is the innervation of the Extensor Digitorum Longus?

Answer 10

Deep peroneal (fibular) nerve

Question 11

What is the origin of the Extensor Hallucis Longus?

Answer 11

Anterior middle 1/3 of fibula and interosseous membrane

Question 12

What is the insertion of the Extensor Hallucis Longus?

Answer 12

Base of distal phalanx of big toe (dorsal surface)

Question 13

What is the action of the Extensor Hallucis Longus?

Answer 13

Extension of big toe (at MTP, IP joint), dorsiflexion and inversion of foot

Question 14

What is the innervation of the Extensor Hallucis Longus?

Answer 14

Deep peroneal (fibular) nerve

Question 15

What is the origin of the Fibularis (Peroneus) Tertius?

Answer 15

Distal 1/3 of anterior fibula

Question 16

What is the insertion of the Fibularis (Peroneus) Tertius?

Answer 16

Base of 5th metatarsal (dorsal)

Question 17

What is the action of the Fibularis (Peroneus) Tertius?

Answer 17

Dorsiflexion and eversion of foot

Question 18

What is the innervation of the Fibularis (Peroneus) Tertius?

Answer 18

Deep peroneal (fibular) nerve

Question 19

What is the origin of the Fibularis (Peroneus) Brevis?

Answer 19

Distal lateral ½ of fibula

Question 20

What is the insertion of the Fibularis (Peroneus) Brevis?

Answer 20

Base of 5th metatarsal (styloid process)

Question 21

What is the action of the Fibularis (Peroneus) Brevis?

Answer 21

Eversion and plantar flexion of foot

Question 22

What is the innervation of the Fibularis (Peroneus) Brevis?

Answer 22

Superficial peroneal nerve

Question 23

What is the origin of the Fibularis (Peroneus) Longus?

Answer 23

Head and proximal lateral shaft of fibula

Question 24

What is the insertion of the Fibularis (Peroneus) Longus?

Answer 24

Medial cuneiform and base of 1st metatarsal

Question 25

What is the action of the Fibularis (Peroneus) Longus?

Answer 25

Eversion and plantar flexion of foot

Question 26

What is the innervation of the Fibularis (Peroneus) Longus?

Answer 26

Superficial peroneal nerve

Question 27

What muscles make up the stirrup of the foot?

Answer 27

Fibularis longus and tibialis anterior

Question 28

What is the origin of the Soleus?

Answer 28

Soleal line of tibia, head of fibula and posterior proximal fibula

Question 29

What is the insertion of the Soleus?

Answer 29

Calcaneus (via calcaneal/Achilles tendon)

Question 30

What is the action of the Soleus?

Answer 30

Plantar flexion of foot (inversion of foot)

Question 31

What is the innervation of the Soleus?

Answer 31

Tibial nerve

Question 32

What is the prime mover for plantar flexion?

Answer 32

Soleus

Question 33

What is the origin of the Gastrocnemius?

Answer 33

Medial head: above medial condyle of femur (posterior), lateral head: above lateral condyle of femur (posterior)

Question 34

What is the insertion of the Gastrocnemius?

Answer 34

Calcaneus (via Achilles tendon)

Question 35

What is the action of the Gastrocnemius?

Answer 35

Plantar flexion of foot (knee flexion and inversion of foot)

Question 36

What is the innervation of the Gastrocnemius?

Answer 36

Tibial nerve