5.2 Anatomy of the Muscular System Part 10

Question 1

What is the origin and insertion of the sartorius?

Answer 1

origin = ASIS
insertion = superior shaft of tibia

Question 2

What is the action of the sartorius?

Answer 2

flexion, abduction, and external rotation of hip
flexion and internal rotation of knee

Question 3

What is the innervation of the sartorius?

Answer 3

femoral nerve

Question 4

What are the anterior muscles of the lower leg?

Answer 4

tibialis anterior
extensor digitorum longus
extensor hallicus longus
peroneus brevis
peroneus longus

Question 5

What are the posterior muscles of the lower leg?

Answer 5

gastrocnemius
soleus
tibialis posterior
flexor digitorum longus
flexor hallicus longus

Question 6

What is the origin and insertion of the tibialis anterior?

Answer 6

origin = lateral condyle of tibia
insertion = base of metatarsal 1 and medial cuneiform

Question 7

What is the action of the tibialis anterior?

Answer 7

dorsiflexion and inversion of foot

Question 8

What is the innervation of the tibialis anterior?

Answer 8

deep peroneal nerve

Question 9

What is the origin and insertion of the extensor digitorum longus?

Answer 9

origin = lateral condyle of tibia
insertion = distal phalanges 2-5

Question 10

What is the action of the extensor digitorum longus?

Answer 10

extends digits 2-5 and dorsiflexion of foot

Question 11

What is the innervation of extensor digitorum longus?

Answer 11

deep peroneal nerve

Question 12

What is the origin and insertion of the extensor hallicus longus?

Answer 12

origin = anterior surface of fibula
insertion = dorsal surface of digit 1

Question 13

What is the action of the extensor hallicus longus?

Answer 13

extension of digit one and dorsiflexion of foot

Question 14

What is the innervation of the extensor hallicus longus?

Answer 14

deep peroneal nerve

Question 15

What is the origin and insertion of the peroneus brevis?

Answer 15

origin = lateral distal fibula
insertion = lateral side of the 5th metacarpal

Question 16

What is the action of the peroneus brevis?

Answer 16

plantarflexion and evert foot

Question 17

What is the innervation of the peroneus brevis?

Answer 17

superficial peroneal nerve

Question 18

What is the origin and insertion of the peroneus longus?

Answer 18

origin = posterior surface of tibia and superior fibula
insertion = base of metatarsal one

Question 19

What is the action of the peroneus longus?

Answer 19

plantarflexion and evert foot

Question 20

What is the innervation of the peroneus longus?

Answer 20

superficial peroneal nerve