Ankle joint Flashcards

1
Q

What type of joint is the ankle joint?

A

Synovial

Hinge type

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2
Q

What are the artculating surfaces of the ankle joint?

A

Tibia
Fibula
Talus

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3
Q

What are the articulating surfaces covered with?

A

Hyaline cartilage

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4
Q

What holds the tibia and fibula together?

A

Tibiofibular ligaments

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5
Q

What do the tibia anf fibula form?

A

A bracket shaped socket

for the talus to fit into

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6
Q

What are the ligaments of the ankle joint?

A

Medial ligament

Lateral ligament

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7
Q

How many ligaments is the medial ligament made up of?

A

Four

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8
Q

What is the medial ligament made up of?

A

Anterior tibiotalar
Posterior tibiotalar
Tibiocalcaneal
Tibionavicular

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9
Q

What is the function of the medial ligament?

A

Resist over-eversion of foot

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10
Q

How many ligaments is the lateral ligament made up of?

A

Three

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11
Q

What is the lateral ligament made up of?

A

Anterior talofibular
Posterior talofibular
Calcaneofibular

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12
Q

What is the function of the lateral ligament?

A

Resist over-inversion of the foot

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13
Q

Where does the medial ligament attach?

A

Medial malleolus

Tarsal bones

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14
Q

What is the medial ligament also known as?

A

Deltoid ligament

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15
Q

Where does the lateral ligament attach?

A

Lateral malleolus
Tarsal bones

NOT INVERSION-EVERSION BECAUSE THAT OCCURS AT SUBTALAR JOINT

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16
Q

What are the movements of the ankle joint?

A

Plantarflexion

Dorsiflexion

17
Q

Which muscles plantarflex the ankle joint?

A

Gastrocnemius
Soles
Plantaris
Tibialis posterior

18
Q

Which muscles dorsiflex the ankle joint?

A

Anterior leg muscles

19
Q

When is the ankle joint more stable? Why?

A

During dorsiflexion

because talus is wedge shaped, wider anteriorly, fits into socket of tibia and fibula better