Tibiofibular Ligaments, Ankle Joint and Ankle Ligaments Flashcards

1
Q

Tibiofibular ligaments

A
  • Interosseous tibiofibular ligament
  • Anterior inferior tibiofibular ligament
  • Posterior inferior tibiofibular ligament
  • Inferior transverse ligament
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2
Q

Interosseous tibiofibular ligament

A
  • NOT a ligament of the ankle joint

- Just the lower-most part of the interosseous membrane

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3
Q

Anterior inferior tibiofibular ligament

A
  • 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
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4
Q

Posterior inferior tibiofibular ligament

A
  • 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
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5
Q

Inferior transverse ligament

A
  • 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
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6
Q

Ankle joint

A

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
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7
Q

General characteristics of ankle joint

A
  • Talocrural joint
  • Talus articulates with the two bones of the leg
  • Hing or ginglymus type of synovial joint
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8
Q

Trochlea of talus

A

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

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9
Q

Fibrous capsule of ankle joint

A
  • 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
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10
Q

Ligaments of the ankle

A
  • Deltoid ligament (4)
  • Lateral collateral ligament (3)
  • Fibulotalocalcaneal ligament
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11
Q

Deltoid ligaments

A
  • Anterior tibiotalar ligament
  • Posterior tibiotalar ligament
  • Tibiocalcaneal ligament
  • Tibionavicular ligament
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12
Q

Anterior tibiotalar ligament (of the deltoid)

A
  • Located deep to the tibionavicular ligament

- Attaches to medial surface of the talus

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13
Q

Posterior tibiotalar ligament (of the deltoid)

A
  • Attaches to the medial tubercle on the posterior surface of the talus
  • Forms a groove for the tendon of the flexor hallucis longus tendon
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14
Q

Tibiocalcaneal ligament (of the deltoid)

A

STRONGEST part of the deltoid ligament

- Attaches to sustentaculum tali

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15
Q

Tibionavicular ligament (of the deltoid)

A

WEAKEST part of the deltoid ligament

  • Superficial to the anterior tibiotalar ligament
  • Most superficial ligament
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16
Q

Two tendons which lie superficial to deltoid ligaments

A
  • Tibialis posterior

- Flexor digitorum longus

17
Q

Lateral collateral ligaments

A
  • Anterior talofibular ligament (ATF)
  • Posterior talofibular ligament
  • Calcaneofibular ligament
18
Q

Anterior talofibular ligament (ATF)

A

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
Q

Posterior talofibular ligament

A
  • 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
Q

Calcaneofibular ligament

A
  • 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
Q

Fibulotalocalcaneal ligament

A
  • 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
Q

Superomedial laminae of fibulotalocalcaneal ligament

A
  • Attaches to lateral tubercle of posterior process of talus
23
Q

Inferolateral laminae of fibulotalocalcaneal ligament

A
  • Attaches to posterior 1/3 of dorsal surface of calcaneus

- Can blen with calcaneofibular ligament laterally

24
Q

Variations in fibulotalocalcaneal ligament

A
  • 60% well defined
  • 20% poorly defined
  • 20% replaced by deep fascia