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Extremities (2) > Unit 4- Ankle Joint > Flashcards

Unit 4- Ankle Joint Flashcards

1
Q

Tibiofibilar joints

A

Superior tibiofibular joint

Tibiofibular syndesmosis (inf tibiofibular joint)

Interosseous membrane

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2
Q

Function of both tibiofibular joints

A

Connect the tibia and fibula, so they move simultaneously as wider posterior superior articular surface of the talus if forces between the malleoli

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3
Q

What type of joint is the superior tibiofibular joint

A

Plane-type synovial joint (between 2 flat surfaces of the fibular head and posterio-lateral tibial condyle)

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4
Q

The superior tibiofibular joint capsule attaches to what?

A

borders of the articular surfaces

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5
Q

tibiofibular joint capsule is strengthened by:

A

anterior and posterior tibiofibular ligaments that pass from the fibular head to the lateral tibial condyle

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6
Q

the tibiofibular joint is crossed by the _____ tendon. This is usually associated with a ____.

A

popliteus

bursa

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7
Q

Movement of the superficial tibiofibular joint

A

Slight gliding with foot dorsiflexion

this accommodates a slight widening of the talar trochlea

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8
Q

innervation of the superior tibiofibular joint

A

common fibular nerve and nerve to popliteus

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9
Q

Inferior tibiofibular joint, AKA

A

Tibiofibular syndesmosis

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10
Q

What type of joint is the inferior tibiofibular joint?

A

Compound fibrous joint

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11
Q

The inferior tibiofibular joint maintains the position of what?

A

the lateral malleolus

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12
Q

The distal tibia and fibular are approximated by the _____ ______ ligament. This is a distal continuation of the _____ _____ and forms:

A

interosseous tibiofibular ligament

interosseous membrane

the principal connection between the distal tibia and fibula

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13
Q

What strengthen the tibiofibular syndesmosis?

A

Anterior and posterior tibiofibular ligaments

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14
Q

What lies between anterior and posterior tibiofibular ligaments?

A

Interosseous ligament

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15
Q

Inferior continuation of the posterior tibiofibular ligament

A

Inferior transverse tibiofibular ligament

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16
Q

The inferior transverse tibiofibular ligament forms a (WEAK/STRONG) connection between what?

A

Strong

Medial and lateral molleoli

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17
Q

The inferior transverse tibiofibular ligament forms the (ANTERIOR/POSTERIOR) wall of what?

A

posterior

Malleolar mortise for the trochlea of the talus

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18
Q

Movement of tibiofibular syndesmosis

A

Slight movement

accommodates wedging of the wide portion of the talar trochlea between the malleoli during dorsiflexion

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19
Q

Innervation of the tibiofibular syndesmosis (3)

A

Deep fibular
Tibial
Saphenous nerves

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20
Q

Where does the interosseous tibiofibular ligament run?

A

between the articular surfaces “inside” the joint

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21
Q

tibiofibular syndesmosis has (INCREASED/DECREASED) stability with plantar flexion. This is due to:

A

Decreased

Narrowing of the talar trochlea

-This position is associated with injuries that occur when the foot is suddenly inverted

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22
Q

Ankle joint, AKA

A

Talocrural articulation

23
Q

What type of joint is the ankle joint?

A

Hinge type synovial

24
Q

Rounded superior articular surface of the talus

A

malleolar mortise

25
Q

Whar forms a malleolar mortise for the trochlea of the talus?

A

Distal tibia, fibula and inferior part of the posterior tibiofibular ligament

26
Q

What articulates with the lateral surface of the talus?

A

Medial surface of the fibula (lateral malleolus)

27
Q

Where does the tibia articulate with the talue? (2 areas)

A

Inferior surface of the tibia (forms roof of malleolar mortise)

Medial malleolus- articulates with medial surface of the talus

28
Q

The talus rocks in the ____ joint

A

talocrural joint

29
Q

The grip of the malleoli on the talus is strongest with _____. Why?

A

Dorsiflexion

The wider part of the anterior trochlea is forces between the distal tibia and fibula

30
Q

The spreading of the talocrural joint is limited by what?

A

Strong interosseous tibiofibular ligament (also prevented by anterior and posterior tibiofibular ligaments)

31
Q

The joint capsule is (THICK/THIN) anteriorly and posteriorly.

32
Q

How is the joint capsule reinforced?

A

Laterally and medially by the strong collateral ligaments

33
Q

The joint capsule attaches superiorly to:

And inferiorly?

A

To the borders of the articular surfaces of the tibia and fibula

on the talus

34
Q

The synovial cavity in the joint capsule often extends where?

A

superiorly between the tibia and fibula as far as the interosseous tibiofibular ligament.

35
Q

Lateral ligaments of the ankle (3)

A

Anterior talofibular ligament

Posterior talofibular ligament

Calcaneofibular ligament

36
Q

Which of the 3 lateral ankle ligaments is more commonly injured?

A

Anterior talofibular ligament

37
Q

which of the 3 lateral ankle ligaments is the strongest?

A

posterior talofibular ligament

38
Q

A flat weak band that extends from the lateral malleolus to the neck of the talus

A

Anterior talofibular ligament

39
Q

A short, strong, horizontal band from the malleolar fossa of the fibula to the lateral tubercle of the talus

A

Posterior talofibular ligament

40
Q

A round cord passing from the tip of the lateral malleolus (fibula) to the lateral surface of the calcaneus

A

cancaneofibular ligament

41
Q

Purpose of the lateral ankle ligaments

A

to limit plantar/dorsi flexion and inversion

42
Q

Medial ligaments of the ankle, AKA

A

Deltoid ligament

43
Q

Where do the medial ankle ligaments attach?

A

proximally to the medial malleolus

44
Q

The deltoid ligament fans out to what bones?

A

Talus, calcaneous and navicular bone

45
Q

4 parts of the deltoid ligament

A

Tibionavicular

anterior tibiotalar

Tibiocalcaneal

Posterior tibiotalar

46
Q

Purpose of the medial ankle ligaments

A

Stabilize the ankle during eversion and prevent subluxation of the ankle joint

47
Q

Dorsiflexion of the ankle is produced by _____ compartment muscles of the leg.

48
Q

What limits dorsiflexion of the ankle?

A

passive resistance of the triceps surae and tension on the medial and lateral ligaments

49
Q

Plantar flexion of the ankle is produces by what muscle compartment?

50
Q

With plantar flexion, there is a slight increase in:

Due to:

A

adduction, abduction, inversion and eversion (“wobble”)

The narrow posterior trochlea

51
Q

Innervation of ankle movements

A

Tibial and deep fibular nerves

52
Q

A “sprained” ankle almost always results from what?

A

an inversion injury usually involving twisting of the weight bearin plantarflexed foot

53
Q

What ankle ligament is injured most often? Why?

A

Lateral ligament

it is much less robust than the medial ligament

54
Q

Review remaining ankle injury slides. Will add them if Rupp says to know them

A

Slide 20-23

Extremities (2) (28 decks)

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