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xCase 24 SBA > Knee joint > Flashcards

Knee joint Flashcards

1
Q

what are the three articulations in the knee joint

A

Tibia -femoral (lateral comndyle of femur- lat condyle tibia, medial condyle of femur- medial condyle of tibia- weight bearing

Patello femoral joint

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2
Q

Label

A
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3
Q

what is the aperture in the knee joint for?

A

Popliteus tendon attachment to the lateralfemur (posteriroly)

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4
Q

label this view of the anteriro knee jooint capsuekl

A
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5
Q

Th synovial membrane of the jpint cpasule reflects anteriroly into the intercondylar area , WHY?

A

excldues the area that will attach the cruciate ligaments

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6
Q

what is the gap for in the firbous joint capsule laterally)

A

|Poplitesu tendon

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7
Q

Name the bursa behind/ superiror to the Patella

what muscle is it attached to

A

Suprapetaaalr tednon

is attached to the articularis genu miuscle (pulls the suprapaetall burs superiroly during extension)

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8
Q

what are the roles of the meniscus

A

tough rubbery firbocaetolage acts a s a shock absorbers

lateral and medial meniscus

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9
Q

label the bursa

A
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10
Q

clergyman knee?

A

superficial infrapatella bursa

overuse/ swlling inflammatio

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11
Q

cause of housemaids Knee?

A

Pre patella bursa inflamamtion

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12
Q

Label the ligametns on the posteriro Knee

What is there role

A

tight in knee extension (most stable positiotn- slack in flexion)

Lateral (fibular) collateral ligament

medial (tibia collateral ligamen t)

arcuate popleatla ligament (lateral side)

Oblique popliteal ligament (medial side)

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13
Q

Label the ligametns in the anteriro of the Knee

A
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14
Q

role of the medial (tibial) collateral ligament? TCL

is it attached to the medial meniscus?

A

stabilsies the joint medially

the midpoint of the TCL is attahched to the medial meniscus

the medial mensicus is thus less mobile than the lateral due to the attachemnt to the TCL- more likely to tear medial mensicus

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15
Q

which meniscus are you more likely to tear and why?

A

Medial mensicus

attached to TCL midpoitn- less flexible - more fixed, more lielly to tear

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16
Q

What is the role of the Lateral (fibular) collateral ligament (FCL)

A

stbailises lateral aspect of the joint

IS NOT attached tothe lateral minsicus unlike the TCL

17
Q

what is the role of the arcuate popliteal ligament?

A

Aries from the posteiro aspect of the fibula head

passes superomediall over the tendon of popliteus then becomes continus with the fibrous capsule

Strenths joint capsule posterolateralu

18
Q

The oblique popliteal ligament is an extension of which posteriro thigh compartment muscle?

A

Semimembranosus

19
Q

Are the Cruciate ligaments inside out outside the synovial cavity of the knee?

A

OUTSIDE the synovial caviyt

but INSIDe the fibroisu capsule of the knee joint

20
Q

Label this

A
21
Q

Describe where the Anterior cruciate ligament ACL attaches?

A

arises from Anteriro part of interocndylar area of tibia

Passes laterall to the medial side of the lateral femoral condyle

22
Q

what is the role of the ACL

A

ACL helops to medially rotate the femur to lock the knee when standing

23
Q

describe ther attachments of the cruicate ligament?

A

arises from the psoterio part of the interocmndylar are of the tibia

passes to the Lateral side of the medial codndyalr

24
Q

tip to remeber

A
25
Q

when are the cruciate ligametn tight and when are they sl;ack

A

tight when knee is extened

slack when knee is flexed

26
Q

describe how the cruciate ligametnns preecent sliding of the fibia on a fixed femur

A

ACL- stops tibia sliding anteriroly on fixed femur

PCLP- stops tibia sliding posterirorly on fixed femur

27
Q

Drawer test

move leg laterally to test the……

A

medial collateral ligament

28
Q

Drawer test

move the leg meidally to stress/tes tthe ……

A

lateral cruciate ligametn

29
Q

The ACL does what?

A

Prevents the femur sliding posteriror

30
Q

the PCL does what?

A

prevetns the femur sliidng anteriorly

31
Q

what is a sign that you have torn the ACL or PCL in aknee injury

A

swelling is immediate to the injurty as the ACL and PCL are vascularised when they tear they bleed

32
Q

what is the /terrible triad of knee injiury

A

ruputre of medial collateral; ligament

tearing medial mincus

tearing ACL

33
Q

tearing the lateral (fibular) collateral ligamrnt is often associated to dmage of which mnerve

A

Common fibular nerve

xCase 24 SBA (18 decks)

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