Ankle Anatomy Flashcards Preview

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Flashcards in Ankle Anatomy Deck (51):
1

what is the true ankle joint?

tibia, fibula articulating with talus
talocrural joint

2

what is the function of the ankle joint?

provides stability
used as a lever for push off during gait
conforms to changing terrain
absorbs shock

3

what are the movements of the talocrural joint?

1 degree of freedom
plantar/dorsiflexion

4

what is a term used to describe the ankle joint?

mortice (carpentry term)-gripper

5

what is the most congruent joint of the body?

ankle

6

where does the proximal tibiofibular joint contribute?

ankle motion
-small amount of sliding

7

what ligaments are at the distal tibiofibular joint?

anterior/posterior tibiofibular ligaments
crural tibiofibular ligament (strongest ligament)

8

where is the talus articular surface wider?

anteriorly

9

what holds the ankle joint so strongly?

bony congruence
ligaments

10

where is the deltoid ligament?

medial aspect of the ankle
(stronger than the lateral collateral)

11

what will happen before ligaments tear at the ankle?

bones will break

12

what are the bands at the lateral aspect of the ankle?

anterior tf (weakest)
post. tf (strongest)
calcaneofibular

13

which malleolus is more distal?

fibula

14

what muscles are responsible for dorsiflexion?

anterior tibialis
extensor digitorum
extensor hallicus longus

15

what muscles are responsible for plantar flexion?

gastrocnemius
soleus
tibialis posterior (also inversion)

16

when you pass out, you will always fall...

forward
(center of gravity passes in the front of the ankle)

17

what is the susentaculum tali?

bony prominence of calcaneus where things link to

18

what is the tarsal canal?

bony tunnel b/w post articular surface of calcaneus and the ant and medial articulation

19

what runs through the tarsal canal?

ligaments

20

what ligaments are present at the subtalar joint?

interosseous talocalcaneal L
Ligamentum cervicis
Med and lat collateral L
Post and lat talocalcaneal L

21

what is the role of the subtalar jt?

connect the leg and the foot
absorb rotational motion of the leg

22

what is the TCN joint?

talocalcaneonavicular joint

23

what is the spring ligament?

plantar calcaneonavicular L
triangle shape that runs along subtalar joint and inserts of the inferior portion of the navicular

24

where does TRUE plantar and dorsiflexion occur?

true ankle joint

25

where does in/eversion occur?

subtalar, TCN joints

26

where is the transverse tarsal joint?

compound joint formed by the talonavicular jt and the calcaneocuboid
divides hindfoot from the midfoot

27

which foot bones are immobile during weight bearing?

navicular
cuboid
(all other bones move around them)

28

what is the long plantar ligament?

from calcaneus and cuboid (inferiorly)
to the base of MT 2,3,4
contributes to stability of the transverse jt

29

which joints are in the midfoot region?

subtalar
TCN
Transverse joint

30

what kind of joints are the TMTs?

plane joints

31

where do you experience plantar fasciitis?

plantar aponeurosis

32

where is the foot arch highest?

medially

33

which tissues maintain longitudinal foot arches?

spring L
long plantar L
short plantar L
plantar aponeurosis

34

which bone is the keystone of the transverse arch of the foot?

middle cuneiform

35

how can you isolate the soleus?

flex the knee, then plantar flex

36

what is the O/I of gastroc?

O: condyles of the femur
I: achilles tendon onto calcaneus

37

what is the O/I of soleus?

O; from tibia and fibula
I; achilles tendon into calcaneus

38

what can gastroc and soleus also cause?

hindfoot supination

39

what is the O/I of tibialis anterior?

O: proximal tibia and interosseus membrane
I: 1st MT and medial cunieform

40

what is the O/I of extensor hallucis longus?

O: anterior fibula and interosseus
I: great toe

41

what is the O/I of the extensor digitorum longus?

O: upper tibia and fibula
I: phalanx of toes 2-5

42

what is the O/I of the fibularis longus?

O: fibula and tibial condyle
I: MT 1 and medial cuneiform (wraps around inferiorly)

43

what is the O/I of the fibularis brevis?

O: mid fibula
I: MT V

44

what do the fibularis muscles do?

evert the ankle

45

what is the O/I of the posterior tibialis?

O: tibia, fibula, interosseus
I: MT 2-5

46

what is the role of the posterior tibialis?

plantar flex
invert foot (strongest)

47

what does the deep peroneal nerve innervate?

tibialis anterior
extensor digitorum longus
extensor digitorum brevis
extensor hallucis longus

48

what does the superficial peroneal nerve innervate?

fibularis longus
fibularis brevis

49

what does the tibial nerve innervate?

gastro
soleus
flexors longuses
tibialis posterior

50

what does the medial plantar nervve innervate?

flexor digitorum brevis
flexor hallucis brevis
abductor hallucis
1st lumbrical

51

what does the lateral plantar nerve innervate?

intrinsic foot muscles

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