Muscles of posterior compartment of Leg

Question 0

gastrocnemius: lateral head and Medial Head insertion

Answer 0

posterior surface of calcaneus via calcaneal tendon

Question 1

gastrocnemius: lateral head and Medial Head orgin

Answer 1

Lateral head:lateral aspect of lateral condyle of femur

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

Question 2

gastrocnemius: lateral head and Medial Head innervation

Answer 2

tibial Nerve (S1, S2)

Question 3

gastrocnemius: lateral head and Medial Head action

Answer 3

plantar flexes ankle when knee is extended , raises heal during walking , and flexes knee joint

Question 4

soleus orgin

Answer 4

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

Question 5

soleus insertion

Answer 5

posterior surface of calcaneus via calcaneal tendon

Question 6

soleus innervation

Answer 6

tibial nerve (S1, S2)

Question 7

soleus action

Answer 7

plantarflexes ankle, steadies leg on foot

Question 8

plantaris orgin

Answer 8

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

Question 9

plantaris insertion

Answer 9

posterior surface of calcaneus via calcaneal tendon

Question 10

plantaris innervation

Answer 10

tibial nerve (S1, S2)

Question 11

plantaris action

Answer 11

mainly proprioception and weakly assists gastrocnemius in plantar-flexion

Question 12

popliteus orgin

Answer 12

lateral surface of lateral condyle of femur and lateral meniscus ( within cavity of knee joint)

Question 13

popliteus insertion

Answer 13

posterior surface of tibia, superior to soleal line

Question 14

popliteus innervation

Answer 14

tibial nerve (L4, L5, S1

Question 15

popliteus action

Answer 15

weakly flexes knee and unlocks it by laterally rotating femur on fixed tibia

Question 16

flexor hallucis longus orgin

Answer 16

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

Question 17

flexor hallucis longus insertion

Answer 17

base of distal phalanx of greater toe ( hallux)

Question 18

flexor hallucis longus innervation

Answer 18

tibial nerves (S2, S3)

Question 19

flexor hallucis longus action

Answer 19

flexes greater toe at all joints weakly plantar flexes ankle

Question 20

flexor Digitorum longus orgin

Answer 20

medial part of posterior surface of tibia inferior to soleal line

Question 21

flexor Digitorum longus insertion

Answer 21

bases of distal phalanges of lateral four toes

Question 22

flexor Digitorum longus innervation

Answer 22

tibial nerve (S2, S3)

Question 23

flexor Digitorum longus action

Answer 23

flexes lateral four toes plantar flexes ankle

supports longitudinal arches of foot

Question 24

tibialis posterior orgin

Answer 24

interosseous membrane, posterior surface of tibia inferior to soleal line, posterior surface of fibula

Question 25

tibialis posterior insertion

Answer 25

primarily to tuberosity of navicular, also cuneiforms, cuboid, bases of 2-4 metatarsals

Question 26

tibialis posterior innervation

Answer 26

tibial nerve (L4, L5)

Question 27

tibialis posterior action

Answer 27

plantar flexes ankle, inverts foot,