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Flashcards in Lower Leg Deck (45):
1

What are the superficial muscles of the posterior compartment of the leg?

Gastrocnemius, soleus and plantaris

2

Which nerve supplies the superficial muscles of the posterior compartment of leg?

Tibial nerve

3

What are the attachments of gastrocnemius?

Origin
- Lateral head - lateral femoral condyle
- Medial head - medial femoral condyle
Insertion - calcaneus

4

Which muscles converge to form calcaneal tendon?

Gastrocnemius, soleus and plantaris

5

What are the actions of gastrocnemius?

Plantarflexion of foot, flexion of knee

6

What are the attachments of soleus?

Origin - soleal line of tibia and proximal fibular area
Insertion - calcaneus

7

What are the actions of soleus?

Plantarflexion of foot

8

What are the attachments of plantaris?

Origin - lateral supracondylar line of femur
Insertion - calcaneal tendon

9

What are the actions of plantaris?

Plantarflexion of foot, flexion of knee

10

Which muscle in the leg is absent in 10% of people?

Plantaris

11

What passes through the superior foramen in interosseous membrane?

Anterior tibial vessels

12

What passes through the inferior foramen in interosseous membrane?

Anterior fibular vessels

13

Which muscles are in the anterior compartment of the lower leg?

Tibialis anterior, extensor hallucis longus, extensor digitorum longus, fibularis tertius

14

What are the attachments of tibialis anterior?

Origin - lateral surface of tibia
Insertion - medial cuneiform and base of first metatarsal

15

What are the actions of tibialis anterior?

Dorsiflexion and inversion of foot

16

What are the attachments of extensor hallucis longus?

Origin - medial surface of fibula
Insertion - base of distal phalanx of big toe

17

What are the actions of extensor hallucis longus?

Extension of big toe and dorsiflexion of foot

18

What are the attachments of extensor digitorum longus?

Origin - lateral condyle of tibia and medial surface of fibula
Insertion - middle and distal phalanges of lateral four toes

19

What are the actions of extensor digitorum longus?

Extension of lateral four toes and dorsiflexion of foot

20

What are the attachments of fibularis tertius?

Origin - medial surface of fibula
Insertion - fifth metatarsal

21

What are the actions of fibularis tertius?

Eversion and dorsiflexion of foot

22

Which muscle in the anterior compartment of lower leg isn't present in everyone?

Fibularis tertius

23

What nerve supplies all the muscles in the anterior compartment of the lower leg?

Deep fibular nerve

24

What is the common function of all the muscles of the anterior compartment of the lower leg?

Dorsiflexion of foot

25

Which muscles are in the lateral compartment of the lower leg?

Fibularis longus and brevis

26

What are the attachments of fibularis longus?

Origin - superiolateral surface of fibula and lateral tibial condyle
Insertion - base of first metatarsal and base of medial cuneiform

27

What are the actions of fibularis longus?

Plantarflexion and eversion of foot
Also supports arches of foot

28

What are the attachments of fibularis brevis?

Origin - inferiolateral surface of fibula
Insertion - tubercle on fifth metatarsal

29

What is the action of fibularis brevis?

Eversion of foot

30

What nerve supplies fibularis longus and brevis?

Superficial fibular nerve (L4-S1)

31

Which muscles make up the deep part of the posterior compartment of the lower leg?

Popliteus, flexor digitorum longus, flexor hallucis longus, tibialis posterior

32

What are the attachments of popliteus?

Origin - posterior surface of proximal tibia
Insertion - lateral condyle of femur

33

What are the actions of popliteus?

Lateral rotation of femur on tibia (unlocking knee)

34

What are the attachments of flexor digitorum longus?

Origin - medial surface of tibia
Insertion - plantar surface of lateral four digits

35

What is the action of flexor digitorum longus?

Flexion of lateral four digits

36

What are the attachments of flexor hallucis longus?

Origin - posterior surface of fibula
Insertion - plantar surface of phalanx of big toe

37

What is the action of flexor hallucis longus?

Flexion of big toe

38

What are the attachments of tibialis posterior?

Origin - interosseous membrane and posterior surface of tibia and fibula
Insertion - plantar surfaces of medial tarsal bones

39

What are the actions of tibialis posterior?

Inversion and plantarflexion of foot
Also maintains medial arch of foot

40

What nerve supplies the posterior muscles of the lower leg?

Tibial nerve

41

What is the order of the tendons posterior to medial malleolus?

Tom - tibialis posterior
Dick - flexor digitorum longus
And - posterior tibial artery
Nervous - tibial nerve
Harry - flexor hallucis longus

42

Which muscles are responsible for plantarflexion of the foot?

Gastrocnemius, soleus, plantaris, fibularis longus, tibialis posterior

43

Which muscles are responsible for dorsiflexion of the foot?

Tibialis anterior, extensor hallucis longus, extensor digitorum longus, fibularis tertius

44

Which muscles are responsible for inversion of the foot?

Tibialis anterior and tibialis posterior

45

Which muscles are responsible for eversion of the foot?

Fibularis tertius, fibularis longus, fibularis brevis