Muscle Action, Origin, Insertion, Nerve

Question 1

Gastrocnemius A

Answer 1

flex knee, plantarflex ankle

Question 2

Gastrocnemius O

Answer 2

condyles of femur (posterior surfaces)

Question 3

Gastrocnemius I

Answer 3

Calcaneus via calcaneal tendon

Question 4

Soleus A

Answer 4

plantarflex ankle

Question 5

Soleus O

Answer 5

soleal line; proximal posterior surface of tibia; posterior aspect of head of fibula

Question 6

soleus I

Answer 6

calcaneus via calcaneal tendon

Question 7

plantaris A

Answer 7

weak plantar flexion of the ankle, weak flexion of the knee

Question 8

plantaris O

Answer 8

lateral supracondylar line of femur

Question 9

Plantaris I

Answer 9

calcaneus via calcaneal tendon

Question 10

popliteus A

Answer 10

medially rotates flexed knee; flexes the knee

this muscle begins flexion eg. if we didn’t have it, we would walk with straight legs

Question 11

popliteus O

Answer 11

lateral condyle of femur

Question 12

popliteus I

Answer 12

proximal posterior aspect of tibia

Question 13

fibularis longus A

Answer 13

everts foot; assists to plantarflex the ankle

Question 14

fibularis longus O

Answer 14

head of fibula; proximal 2/3 of lateral fibula

Question 15

fibularis longus insertion

Answer 15

base of first metatarsal and medial cuneiform (cannot say tarsometatarsal joint as inserts on these 2 bones at different points)

Question 16

fibularis brevis A

Answer 16

evert the foot; assist to plantarflex ankle

Question 17

fibularis brevis O

Answer 17

distal 2/3 of the lateral fibula

Question 18

fibularis brevis I

Answer 18

tuberosity of 5th metatarsal

Question 19

tibialis anterior A

Answer 19

invert foot; dorsiflex ankle

Question 20

tibialis anterior O

Answer 20

lateral condyle of tibia; proximal lateral surface of tibia; interosseous membrane

Question 21

tibialis anterior I

Answer 21

medial cuneiform and base of first metatarsal

Question 22

extensor digitorum longus A

Answer 22

extend 2nd through 5th toes; dorsiflex ankle; evert foot

Question 23

extensor digitorum longus O

Answer 23

lateral condyle of tibia, proximal anterior shaft of fibula, interosseous membrane

Question 24

extensor digitorum longus I

Answer 24

middle and distal phalanges of 2nd through 5th toes

Question 25

extensor hallicus longus A

Answer 25

extend first toe, dorsiflex ankle, invert foot

Question 26

extensor hallucis longus O

Answer 26

middle anterior shaft of fibula; interosseous membrane

Question 27

extensor hallucis longus I

Answer 27

distal phalanx of first toe

Question 28

tibialis posterior A

Answer 28

invert foot; plantarflex ankle

Question 29

tibialis posterior O

Answer 29

proximal posterior shafts of tibia and fibula, interosseous membrane

Question 30

tibialis posterior insertion

Answer 30

tuberosity of navicular, medial cuneiform, intermediate cuneiform, sustenticulum tali, 2nd to 4th metatarsals

Question 31

felexor digitorum longus A

Answer 31

flex 2nd through 5th toes, weak plantarflexion of ankle, invert foot

Question 32

flexor digitorum longus O

Answer 32

middle posterior surface of tibia

Question 33

flexor digitorum longus I HUGE QUESTION MARK

Answer 33

plantar aspect of base of distal phalanges of 2nd through 5th toes

Question 34

flexor hallicus longis O

Answer 34

middle half of posterior fibula

Question 35

flexor hallicus longus I

Answer 35

distal phalanx of first toe

Question 36

flexor hallicus longus A

Answer 36

flex first toe, weak plantar flexion, invert foot