Posterior Leg Compartment Muscles

Question 0

Insertion of gastrocnemius

Answer 0

Posterior surface of calcaneous via calcaneal tendkm

Question 1

Origin if gastrocnemius

Answer 1

Lateral head: lateral aspect of lateral condyle of femur

Medial head: popliteal surface of femur, superior to medial condyl

Question 2

Innervation if gastrocnemius

Answer 2

Tibial nerve S1 and S2

Question 3

Action of gastrocnemius

Answer 3

Plantarflexes ankle when knee is extended, raises heel during walking, flexes knee joint

Question 4

Origin of soleus

Answer 4

Posterior aspect of head o fibula, superior quarter of posterior surface of fibula, soleal line, and medial border of tibia

Question 5

Insertion of soleus

Answer 5

Posterior surface of calcanous via calcaneal tendon

Question 6

Innervation of soleus

Answer 6

Tibial nerve S1 andS2

Question 7

Action of soleus

Answer 7

Plantar flexes ankle

Question 8

Origin of plantaris

Answer 8

Inferior end of lateral supracondylar line of femur and oblique popliteal ligament

Question 9

Insertion of plantaris

Answer 9

Posterior surface of calcaneous via calcaneal tendon

Question 10

Innervation of plantaris

Answer 10

Tibial nerve S1 and S2

Question 11

Action of plantaris

Answer 11

Weakly helps plantarflex ankle, proprioceptive function

Question 12

Origin if popliteus

Answer 12

Lateral surface of lateral condole of femur and lateral meniscus

Question 13

Insertion of popliteus

Answer 13

Posterior surface of tibia, superior to soleal line

Question 14

Innervation of popliteus

Answer 14

Tibial nerve L4,L4,S1

Question 15

Action of popliteus

Answer 15

Weakly flexes knee and unlocks it by laterally rotating femur on tibia

Question 16

Origin of flexor hallucis longus

Answer 16

Inferior 2/3 of posterior surface of fibula and inferior part of interosseous membrane

Question 17

Insertion of flexor hallucis longus

Answer 17

Base of distal phalanx of great toe

Question 18

Innervation of flexor hallucis longus

Answer 18

Tibial nerve S2 andS3

Question 19

Action of flexor hallucis longus

Answer 19

Flexes big toe, weakly plantar flexes ankle, supports medial longitudinal arch of foot

Question 20

Origin of flexor digitorum longus

Answer 20

Medial part of posterior surface of tibia inferior to soleal line

Question 21

Insertion of flexor digitorum longus

Answer 21

Base of distal phalanges of lateral four digits

Question 22

Innervation of flexor digitorum longus

Answer 22

Tibial nerve S2 and S3

Question 23

Action of flexor digitorum longus

Answer 23

Flexes lateral four digits, plantar flexes ankle and supports longitudinal arches of foot

Question 24

Origin of tibialis posterior

Answer 24

Interosseous membrane, posterior surface of tibia inferior to soleal line, and posterior surface of fibula

Question 25

Insertion of tibialis posterior

Answer 25

Tuberosity of navicular, also to cuneiforms, cuboid, bases of 2-4th metatarsals

Question 26

Innervation of tibialis posterior

Answer 26

Tibial nerve L4 and L5

Question 27

Action of tibialis posterior

Answer 27

Plantarflexes ankle, inverts foot, supports medial longitudinal arch of foot