Tibiofibular Ligaments, Ankle Joint and Ankle Ligaments Flashcards Preview

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Flashcards in Tibiofibular Ligaments, Ankle Joint and Ankle Ligaments Deck (24):
1

Tibiofibular ligaments

- Interosseous tibiofibular ligament
- Anterior inferior tibiofibular ligament
- Posterior inferior tibiofibular ligament
- Inferior transverse ligament

2

Interosseous tibiofibular ligament

- NOT a ligament of the ankle joint
- Just the lower-most part of the interosseous membrane

3

Anterior inferior tibiofibular ligament

- Triangular ligament
- Originates at the anterior border of the fibular notch of the tibia
- Inserts on the anterior border of the fibular shaft and lateral malleolus
- Forms anterior portion of the socket for the talus

4

Posterior inferior tibiofibular ligament

- Quadrilateral in shape
- Originates from the posterior border of the fibular notch of the tibia
- Inserts on the the upper part of the lateral malleolar facet
- The ligament also has a portion near the knee joint which is more superficial and superior
- The posterior inferior tibiofibular ligament is considered deep
- Contains elastic fibers which helps form the tibial plafond

5

Inferior transverse ligament

- Blends with the posterior fibrous capsule
- Helps to form the socket for the trochlea of the talus
- Found distally to the posterior inferior tibiofibular ligament

6

Ankle joint

Synovial joint
- Most of the foot and ankle joints are synovial
- Contain hyaline cartilage which covers the articular surfaces and the articular capsule
- Synovial membrane lines the joint capsule (not articular surface) and secretes synovial fluid

7

General characteristics of ankle joint

- Talocrural joint
- Talus articulates with the two bones of the leg
- Hing or ginglymus type of synovial joint

8

Trochlea of talus

Trochlea of talus fits into socked formed by
- Tibia and fibula
- Anterior inferior tibiofibular ligament
- Inferior transverse ligament

NOTE: posterior inferior tibiofibular ligament does NOT contribute to the joint socket

9

Fibrous capsule of ankle joint

- Thickened medially and laterally as the collateral ligaments
- Thin anteriorly and posteriorly
- Anteriorly there are broad, thin stretches to the neck of the talus
- Posteriorly consists of transverse fibers, some of which blend with the inferior transverse ligament

10

Ligaments of the ankle

- Deltoid ligament (4)
- Lateral collateral ligament (3)
- Fibulotalocalcaneal ligament

11

Deltoid ligaments

- Anterior tibiotalar ligament
- Posterior tibiotalar ligament
- Tibiocalcaneal ligament
- Tibionavicular ligament

12

Anterior tibiotalar ligament (of the deltoid)

- Located deep to the tibionavicular ligament
- Attaches to medial surface of the talus

13

Posterior tibiotalar ligament (of the deltoid)

- Attaches to the medial tubercle on the posterior surface of the talus
- Forms a groove for the tendon of the flexor hallucis longus tendon

14

Tibiocalcaneal ligament (of the deltoid)

STRONGEST part of the deltoid ligament
- Attaches to sustentaculum tali

15

Tibionavicular ligament (of the deltoid)

WEAKEST part of the deltoid ligament
- Superficial to the anterior tibiotalar ligament
- Most superficial ligament

16

Two tendons which lie superficial to deltoid ligaments

- Tibialis posterior
- Flexor digitorum longus

17

Lateral collateral ligaments

- Anterior talofibular ligament (ATF)
- Posterior talofibular ligament
- Calcaneofibular ligament

18

Anterior talofibular ligament (ATF)

SHORTEST part
- Attaches to the anterior margin of the lateral malleolus and neck of the talus
- Overhangs tarsal sinus
- Most commonly injured with inversion ankle sprains***
- REMEMBER: ATF inversion

19

Posterior talofibular ligament

- DEEPEST and STRONGEST part of lateral collateral ligament
- Attaches to the lateral malleolar fossa and lateral tubercle of the posterior talus
- Forms a groove for the tendon of flexor hallucis longus

20

Calcaneofibular ligament

- Long, cord-like ligament
- Attaches to apex of lateral malleolus and an unnamed tubercle on the lateral calcaneus
- WEAKEST part
- Covered by the peroneus longus and brevis

21

Fibulotalocalcaneal ligament

- Located on the posterolateral ankle, but NOT a collateral ligament
- Superiorly attaches to posterior lateral malleolus (blends with posterior tibiofibular ligament)
- Divides into two laminae - superomedial and inferolateral laminae

22

Superomedial laminae of fibulotalocalcaneal ligament

- Attaches to lateral tubercle of posterior process of talus

23

Inferolateral laminae of fibulotalocalcaneal ligament

- Attaches to posterior 1/3 of dorsal surface of calcaneus
- Can blen with calcaneofibular ligament laterally

24

Variations in fibulotalocalcaneal ligament

- 60% well defined
- 20% poorly defined
- 20% replaced by deep fascia