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MS2 > LECTURE 10: KIN OF KNEE > Flashcards

LECTURE 10: KIN OF KNEE Flashcards

1
Q

What are the two joints to consider at the knee?

A

Tibiofemoral
Patellofemoral

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2
Q

What is the closed pack position of the tibiofemoral joint?

A

Full extension with external tibial rotation

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3
Q

What is the typical dislocation at the tibiofemoral joint?

A

Tibia moves posterior or anterior but uncommon

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4
Q

What movements are permitted at the tibiofemoral joint?

A

Flex-ex
Lock/unlock mechanism

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5
Q

How many ligaments are at the tibiofemoral?

A

8

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6
Q

What are the ligaments at the knee?

A

Medial collateral
Lateral collateral
ACL
PCL
Oblique popliteal
Arcuate popliteal
Coronary
Patellomeniscal
Transverse
Meniscofemoral

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7
Q

What does the meniscofemoral ligament do?

A

Secures lateral meniscus to PCL and medial femoral condyle

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8
Q

What does the patellomeniscal ligament do?

A

Hold menisci to posterior patella

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9
Q

What does the transverse ligament do?

A

Holds the two menisci together

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10
Q

What does the coronary menisci do?

A

Hold menisci to tibial plateau

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11
Q

What does the arcuate popliteal ligament do?

A

Limits extension and varus on extended knee, reinforces posterior lateral joint

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12
Q

What does the oblique popliteal ligament do?

A

Limits extension and vagus on an extended knee, reinforces posterior medial joint
Tendinous expansion of Semimembranosus

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13
Q

What does the PCL do?

A

Prevents tibia from moving posterior on femur.
Limits hyperflexion and hyperextension
Primary stabilizer at 90 degrees knee flex
Supported by quads
Intracapsular, extrasynovial

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14
Q

What does the ACL do?

A

Prevents tibia from moving anterior on femur
Limits hyperextension
Supported by hamstrings
Intracapsular, extrasynovial

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15
Q

What does the lateral collateral do?

A

Checks varus stress, extension and lateral rotation
Does not attach to capsule or menisci

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16
Q

what does medial collateral do?

A

Limits vastus stress, extension and lateral rotation
Inner fibres blend with medial meniscus
Posterior medial fibres blend with capsule

17
Q

Is the medial or lateral collateral ligament stronger?

A

Lateral

18
Q

What are the supporting structures of the patellofemoral joint?

A

Quad tendon- (prevents inferior and mediolateral displacement)
Patellar tendon- (prevents superior and mediolateral displacement)
Extensor retinaculum-(prevents mediolateral displacement)

19
Q

What movements are permitted at the patellofemoral joint?

A

Flex-ex

20
Q

Functional the tibiofemoral is considered to be____?

A

Part of the ankle, it has a separate joint capsule

21
Q

What are the primary muscles of the knee?

A

Hamstring group
Sartorious
Gastrocnemius
Soleus
IT band
Quads

22
Q

What does the hamstring group do at the knee?

A

Most effective knee flexor with a flexed hip

MS2 (31 decks)

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