Foot and ankle arthrology Flashcards

1
Q

What is the Talocrural Joint?

A

AKA mortise joint. It is the joint between the talus and tibia/fibula

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2
Q

What forms the mortise joint?

A

Medial and lateral malleolus (lego blocks)

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3
Q

What type of joint is the Distal (inferior) Tibiofibular joint?

A

Planar joint

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4
Q

What type of joint is the talocrural joint?

A

Hinge joint

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5
Q

What are the ligaments of the Distal Tibiofibular joint?

A

AITFL: anterior inferior tibiofibular lig

interosseous membrane

PiTFL: posterior inferior tibiofibular lig

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6
Q

What is the strong, thick, dense ligament which stabilizes the syndesmosis between the two bones?

A

PiTFL: posterior inferior tibiofibular lig

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7
Q

What helps stabilize the tibia and fibula to create the mortus for the talus to sit in?

A

AiTFL & interosseous membrane

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8
Q

is the talus CONVEX or CONCAVE?

A

Convex

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9
Q

is the distal tibia CONVEX or CONCAVE

A

Concave

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10
Q

When is there forces on the syndesmosis?

A

DF

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11
Q

What action causes post glide of talus in mortise?

A

DF

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12
Q

What causes gapping or separation of syndesmosis?

A

DF

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13
Q

Fibula glides POST when you

A

DF

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14
Q

What action causes an ANT glide of talus in mortise?

A

PF

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15
Q

What closes the syndesmosis?

A

PF

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16
Q

Fibula glides ANT when you?

A

PF

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17
Q

How does a high ankle sprain occur?

A

Hyper DF (snowboarding)

OR Eversion, Rotation & DF (most common way)

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18
Q

What gets damaged when you get a high ankle sprain?

A

Anterior tibiofibular ligament and the syndesmosis.

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19
Q

What are the ligaments of the medial ankle?

A

“deltoid” or medial collateral lig (3 parts)

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20
Q

What are the 3 parts of the Deltoid lig?

A

1) Tibiotalar (ant & post)
2) Tibiocalcaneal lig
3) Tibionavicular lig

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21
Q

What does the Deltoid lig resist?

A

Eversion force at talus, calcaneus and navicular bone (cause each of 3 ligs attaches to the three bones)

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22
Q

What are the lateral ankle ligaments called?

A

1) ATFL: anterior talofibular lig
2) CFL: Calcaneofibular lig
3) PTFL: Posterior Talofibular lig

23
Q

What does the ATFL resist?

A

ANT translation of talus in mortise. If you PF it also prevents inversion forces on talus

24
Q

What does the CFL resist?

A

Inversion of calcaneus in PF and DF

25
Q

What does the PTFL resist?

A

Inversion of talus from neutral to DF

26
Q

Subtalar joint morphology?

A

On POST side we have a CONVEX calcaneus which integrates with CONCAVE talus

On ANT side we have Concave side which integrates with the CONVEX talus

27
Q

What is the ankle great at?

A

dissipating forces

28
Q

How many planes of motion does the subtalar joint have?

A

3: IN/EV, PF/DF, ADD/ABD

29
Q

Calcaneus moves on talus in WB or none WB?

A

None WB

30
Q

talus moves on Calcaneus in WB or none WB?

A

WB

31
Q

In weight bearing what motions happen for pronation?

A

Calcaneal eversion, Talar adduction, talar PF

32
Q

In weight bearing what motions happen for supination?

A

Calcaneal inversion, talar abduction, talar df

33
Q

In NONE weight bearing what motions happen for supination? (with calcaneus)

A

Calcaneal inversion, cancanear addcution,

calcanea PF

34
Q

In NONE weight bearing what motions happen for pronation? (with calcaneus)

A

calcaneal eversion, calcaneal abduction, calcaneal DF

35
Q

When foot is supinated is axis parallel or perpendicular?

A

perpendicular

36
Q

When foot is pronated is axis parallel or perpendicular?

A

parallel

37
Q

What is referred to “loose bag of bones”

A

foot is pronated (reduced force)

38
Q

Supination or pronation, which is more optimal to push off of?

A

supination

39
Q

What happens to tibia and foot during supination?

A

ER of tibia

inversion, add, PF of forefoot

40
Q

What happens to tibia and foot during pronation?

A

IR of tibia

Eversion, ABD, DF of fore foot

41
Q

What type of joints are intertarsal joints?

A

planar joints

42
Q

what is the goal of the intertarsal joints?

A

provide stability

43
Q

Damage to what foot joint can cause pain when you push off the forefoot?

A

Tarsometatarsal joint “lis franc”

44
Q

Whats the most important ligament involving the medial longitudinal arch?

A

Spring ligament AKA “plantar clacaneonavicular ligament”

45
Q

Plantar ligaments are where?

A

bottom (plantar) aspect of the foot

46
Q

What are the plantar ligaments of the foot?

A

Long plantar lig & short plantar lig

47
Q

What is another name for ovoid joint?

A

condyloid

48
Q

Where is the short plantar lig? where does it connect

A

deep to the long one. connects from calcaneus to cuboid

49
Q

How can someone damage their Spring ligament?

A

Acute trauma or diabetes.

50
Q

What kind of joint are the MTP joints

A

synovial condyloid joints

51
Q

Whats the morphology of the MTP joint?

A

Convex metatarsal and CONCAVE proximal phalanges

52
Q

What type of joints are the interphalangeal joints?

A

hinge joints

53
Q

What are the collateral ligaments of the IP joints used to resist?

A

FLX/EXT

54
Q

Do MTP joints of foot have collateral ligaments too?

A

YES