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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
Whar forms a malleolar mortise for the trochlea of the talus?
Distal tibia, fibula and inferior part of the posterior tibiofibular ligament
26
What articulates with the lateral surface of the talus?
Medial surface of the fibula (lateral malleolus)
27
Where does the tibia articulate with the talue? (2 areas)
Inferior surface of the tibia (forms roof of malleolar mortise) Medial malleolus- articulates with medial surface of the talus
28
The talus rocks in the ____ joint
talocrural joint
29
The grip of the malleoli on the talus is strongest with _____. Why?
Dorsiflexion The wider part of the anterior trochlea is forces between the distal tibia and fibula
30
The spreading of the talocrural joint is limited by what?
Strong interosseous tibiofibular ligament (also prevented by anterior and posterior tibiofibular ligaments)
31
The joint capsule is (THICK/THIN) anteriorly and posteriorly.
Thin
32
How is the joint capsule reinforced?
Laterally and medially by the strong collateral ligaments
33
The joint capsule attaches superiorly to: And inferiorly?
To the borders of the articular surfaces of the tibia and fibula on the talus
34
The synovial cavity in the joint capsule often extends where?
superiorly between the tibia and fibula as far as the interosseous tibiofibular ligament.
35
Lateral ligaments of the ankle (3)
Anterior talofibular ligament Posterior talofibular ligament Calcaneofibular ligament
36
Which of the 3 lateral ankle ligaments is more commonly injured?
Anterior talofibular ligament
37
which of the 3 lateral ankle ligaments is the strongest?
posterior talofibular ligament
38
A flat weak band that extends from the lateral malleolus to the neck of the talus
Anterior talofibular ligament
39
A short, strong, horizontal band from the malleolar fossa of the fibula to the lateral tubercle of the talus
Posterior talofibular ligament
40
A round cord passing from the tip of the lateral malleolus (fibula) to the lateral surface of the calcaneus
cancaneofibular ligament
41
Purpose of the lateral ankle ligaments
to limit plantar/dorsi flexion and inversion
42
Medial ligaments of the ankle, AKA
Deltoid ligament
43
Where do the medial ankle ligaments attach?
proximally to the medial malleolus
44
The deltoid ligament fans out to what bones?
Talus, calcaneous and navicular bone
45
4 parts of the deltoid ligament
Tibionavicular anterior tibiotalar Tibiocalcaneal Posterior tibiotalar
46
Purpose of the medial ankle ligaments
Stabilize the ankle during eversion and prevent subluxation of the ankle joint
47
Dorsiflexion of the ankle is produced by _____ compartment muscles of the leg.
Anterior
48
What limits dorsiflexion of the ankle?
passive resistance of the triceps surae and tension on the medial and lateral ligaments
49
Plantar flexion of the ankle is produces by what muscle compartment?
posterior
50
With plantar flexion, there is a slight increase in: Due to:
adduction, abduction, inversion and eversion ("wobble") The narrow posterior trochlea
51
Innervation of ankle movements
Tibial and deep fibular nerves
52
A "sprained" ankle almost always results from what?
an inversion injury usually involving twisting of the weight bearin plantarflexed foot
53
What ankle ligament is injured most often? Why?
Lateral ligament it is much less robust than the medial ligament
54
Review remaining ankle injury slides. Will add them if Rupp says to know them
Slide 20-23

Extremities (2) (28 decks)

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