Lower Leg Muscles

Question 0

Muscles of the anterior leg?

Answer 0

Tibialis anterior
Extensor digitorum longus
Extensor hallucis longus
Fibularis tertius

Question 1

Innervation of the anterior compartment of the leg?

Answer 1

Deep fibular nerve

L4, L5

Question 2

Attachments of the tibialis anterior?

Answer 2

Lateral condyle and superior lateral surface of tibia and interosseous membrane
Medial cuneiform and base of first metatarsal

Question 3

Action of the tibialis anterior?

Answer 3

Dorsiflexes ankle

Inverts foot

Question 4

Attachments of the extensor digitorum longus?

Answer 4

Lateral condyle of tibia and superior three quarters of medial fibula and interosseous membrane
Middle and distal phalanges of lateral 4 digits

Question 5

Action of the extensor digitorum longus?

Answer 5

Extends lateral four digits

Dorsiflexes ankle

Question 6

Action of the extensor hallucis longus?

Answer 6

Extends great toe

Dorsiflexes ankle

Question 7

Attachments of the extensor hallucis longus?

Answer 7

Anterior surface of fibula and interosseous membrane

Dorsal aspect of base of distal phalanx of great toe (hallux)

Question 8

Attachments of the fibularis tertius?

Answer 8

Inferior third and anterior surface of fibula

Dorsum of base of 5th metatarsal

Question 9

Action of the fibularis tertius?

Answer 9

Dorsi flexes ankle

Everts foot

Question 10

Muscles of the lateral compartment of the lower leg?

Answer 10

Fibularis longus

Fibularis brevis

Question 11

Attachments of the fibularis longus?

Answer 11

Head and superior two thirds of lateral surface of fibula

Base of metatarsal I and medial cuneiform

Question 12

Action of the fibularis longus?

Answer 12

Everts foot weakly and plantarflexes ankle

Question 13

Innervation of the lateral compartment of the lower leg?

Answer 13

Superficial fibular nerve

L5, S1, S2

Question 14

Attachments of the fibularis brevis?

Answer 14

Inferior two thirds of lateral surface of fibula

Tuberosity on lateral side of base of 5th metatarsal

Question 15

Action of the fibularis brevis?

Answer 15

Everts foot

Weakly plantarflexes ankle

Question 16

What does injury to the common fibular nerve result in?

Answer 16

Foot drop

Question 17

What are the posterior leg muscles innervated by?

Answer 17

Tibial nerve

Question 18

Name the superficial muscles of the posterior compartment of the leg

Answer 18

Gastrocnemius
Soleus
Plantaris

Question 19

Name the deep muscles of the posterior leg

Answer 19

Popliteus
Flexor hallucis longus
Flexor digitorum longus
Tibialis posterior

Question 20

Attachments of the gastrocnemius?

Answer 20

Lateral head: Lateral condyle of femur
Medial head: popliteal surface of femur

Posterior surface of calcaneus via calcaneal tendon

Question 21

Attachment of the soleus muscles?

Answer 21

Posterior aspect of head and surface of fibula and soleal line of tibia
Posterior surface of calcaneus via calcaneal tendon

Question 22

Action of ten gastrocnemius?

Answer 22

Plantarflexes ankle when knee is extended
Raises heel during walking
Flexes leg at knee joint

Question 23

Action of the soleus?

Answer 23

Plantarflexes ankle

Steadies leg in foot

Question 24

Attachments of the plantaris?

Answer 24

Lateral supracondylar line of FEMUR | Posterior surface of calcaneus via calcaneal tendon

Question 25

Action of ten plantaris?

Answer 25

Weakly assists gastrocnemius in plantarflexing the ankle

Question 26

Attachments of the popliteus?

Answer 26

Lateral condyle of femur and lateral meniscus | Posterior surface of tibia

Question 27

Action of the popliteus?

Answer 27

Weakly flexes the knee Unlocks it by rotating femur by 5* Medially rotates tibia of unplanted limb

Question 28

Attachments of the flexor hallucis longus?

Answer 28

Posterior fibula and interosseous membrane | Base of distal phalanx of great toe

Question 29

Actions of the flexor hallucis longus?

Answer 29

Flexes the great toe Weakly plantarflexes the ankle Supports medial longitudinal arch of the foot

Question 30

Attachments of the flexor digitorum longus?

Answer 30

Posterior tibia to bases of distal phalanges of lateral four digits

Question 31

Action of the flexor digitorum longus?

Answer 31

Flexes lateral 4 digits Plantarflexes ankle Supports longitudinal arch of the foot

Question 32

Attachments of the tibialis posterior?

Answer 32

Interosseous membrane, posterior tibia and fibula | Tuberosity of navicular, cuneiform, cuboid and calcaneus and bases of 2nd-4th metatarsals

Question 33

Actions of the tibialis posterior?

Answer 33

Plantarflexes the ankle | Inverts the foot