Lower Leg, Ankle, Foot Lecture Flashcards Preview

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Flashcards in Lower Leg, Ankle, Foot Lecture Deck (46)
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1

Hindfoot

Inferior tib fib
Talocrural
Subtalar (talocalcaneal)

2

Midfoot

Talocalcaneonavicular
Cuneonavicular
Cuboideonavicular
Intercuneiform
Cuneocuboid
Calcaneocuboid

3

Forefoot

Tarsometatarsal
Intermetatarsal
Metatarsophalangeal
Interphalangeal

4

Inferior tib fib

(Hindfoot)
Fibrous syndesmoses
1-2 mm spread w/ DF - superior glide of fibula

5

Tibfib resting

Plantar flexion

6

Tibfib closed pack

Max DF

7

Tibiofibular capsular pattern

Pain on stress

8

Talocrural joint

Uniaxial, modified hinge, synovial

Med and lat malleolus w/ talus
Med doesn’t extend as far down
Branches of tibial and deep fibular nerves

9

The talus is wider

Anteriorly

10

Ankle dorsiflexion and plantar flex ROM

DF 20
PF 50

11

Talocrural open pack

10 deg PF
Midway b/n max inversion and eversion

12

Talocrural closed pack

Full DF

13

Talocrural capsular pattern

PF, DF

14

Talocrural - deltoid / medial collateral ligament

Tibionavicular
Tibiocalcaneal
Posterior tibiotalar
Anterior tibiotalar

15

Talocrural lateral ligaments

ATFL
Posterior talofibular lig
Calcaneofibular lig

16

Subtalar joint

3 seperate planar articulation
Triplanes motion around a single axis
Important for dampening rotational forces imposed by BW
Gliding and rotation are main motions
May become hypomobile after injury
No muscles attach to the talus

17

Subtalar joint axis

42 deg upward and anteriorly from transverse plane

Medically included 16 deg

Results in triplanar motion around 1 axis

18

Subtalar primary motions

Supination and pronation - composite motions in three planes that cannot and do not occur independently

19

NWB motion (Subtalar)

Talus stable
Calcaneus and foot move around talus

20

NWB supination

Calcaneal adduction
Inversion
Plantar flexion

21

NWB pronation

Calcaneal abduction
Eversion
Dorsiflexion

22

Closed chain Subtalar

Calcaneous no longer able to accomplish all 3 components of movement
-can still invert and evert
-proximal Tatar segment now moves on fixed calcaneus

23

Closed chain supination

Talus- abducts, dorsiflexion
Calcaneus - inversion or varus

Tibiofibular lateral rotation

24

Closed chain pronation

Talus - adduction, plantar flexion
Calcaneus - eversion or valgus

Tibiofibular medial rotation (10 deg)

25

Talocalcaneonavicular

Convex head of talus and concave navicular
-plantar calcaneonavicular ligament depends it
Talus acts as ball bearing between mortise, calcaneus, and navicular

26

Talocalcaneonavicular axis

Essentially the same as subtalar

27

Key joint to foot function

TCN

28

Joints forming single elastic unit

Distal to TCN
-moves in response to and compensates for movement of talus and calcaneus

29

Midtarsal joint types

Cuneonavicular - plane synovial

Cuboideonavicular - fibrous joint

Intercuneiform - plane synovial

Cuneocuboid - plane synovial

Slight gliding and rotation at these

30

Midtarsal joints resting

Midway b/n extremes of ROM