Lower Extremity 3rd Part

Question 1

Origin of the Tibialis anterior

Answer 1

Lateral condyle and shaft of tibia

Question 2

Insertion of the Tibialis anterior

Answer 2

Base of metatarsal bone 1(hallux); medial cuneiform

Question 3

Function of the Tibialis anterior

Answer 3

Dorsiflexion; inversion at ankle joint

Question 4

Origin of Extensor hallucis longus

Answer 4

Anterior surface of tibia and fibula + interosseous membrane

Question 5

Insertion of the Extensor Hallucis Longus

Answer 5

Dorsal surface of the base of the distal phalanx of digit 1 ( great toe, hallux)

Question 6

Function of the Extensor Hallucis Longus

Answer 6

Ext. of toe + Dorsiflexion

Question 7

Origin of the Extensor Hallucis Brevis

Answer 7

Dorsal portion of calcaneus

Question 8

Insertion of Extensor Hallucis Brevis

Answer 8

Dorsal surface of the base of the proximal phalanx of digit 1 (great toe, hallux)

Question 9

Function of Extensor Hallucis Brevis

Answer 9

Ext. of toe

Question 10

Insertion of the Extensor Digitorum Longus

Answer 10

Distal phalanges of digits 2-5

Question 11

Origin of the Extensor digitorum Longus

Answer 11

Lateral condyle of tibia; fibular shaft ; interosseous membrane

Question 12

Function of the Extensor Digitorum Longus

Answer 12

Ext. of the toes; Dorsiflexion at talocrural joint; eversion at subtalar joint

Question 13

Origin of the Extensor Digitorum Brevis

Answer 13

Dorsal and lateral surface of the calcaneus

Question 14

Insertion of the Extensor Digitorum Brevis

Answer 14

Extensor digitorum longus tendons of toes 2-4

Question 15

Function of the Extensor Digitorum Brevis

Answer 15

Ext. of the toes 2-4

Question 16

Origin of Fibularis (peroneus) tertius

Answer 16

Anterior surface of fibula + tibiofibular ligament + intermuscular septum

Question 17

Insertion of the Fibularis tertius

Answer 17

Dorsal surface of base of metatarsal bone 5

Question 18

Function of the Fibularis tertius

Answer 18

Dorsiflexion at talocrural joint + eversion at subtalar joint

Question 19

Origin of the Gastrocnemius

Answer 19

Medial and lateral heads arise from the posterior surfaces of their respective femoral condyles

Question 20

Insertion of Gastrocnemius

Answer 20

Posterior surface of the calcaneus via the Achilles tendon (calcaneal tendon)

Question 21

Function of the Gastrocnemius

Answer 21

Plantar flexion at talocrural joint + flex. of leg at knee joint

Question 22

Origin of the Soleus

Answer 22

Soleal line and medial border of tibia + head and posterior border of fibula

Question 23

Insertion of the Soleus

Answer 23

Posterior surface of the calcaneus via the Achilles tendon ( calcaneal tendon)

Question 24

Function of the Soleus

Answer 24

Plantar flexion at talocrural joint

Question 25

Origin of the Plantaris

Answer 25

Lower part of supracondylar line of femur (right above lateral head of gastrocnemius)

Question 26

Insertion of the Plantaris

Answer 26

Posterior surface of the calcaneus via the Achilles tendon (calcaneal tendon)

Question 27

Function of the Plantaris

Answer 27

Plantar flexion at talocrural joint + flexion of leg at knee joint

Question 28

Origin of the Popliteus

Answer 28

Lateral surface of the lateral condyle of the femur

Question 29

Insertion of the Popliteus

Answer 29

Posterior surface of proximal tibia

Question 30

Function of the Popliteus

Answer 30

Unlocks the knee + stabilises knee joint