Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Anatomy LE > knee > Flashcards

knee Flashcards

1
Q

Tibial Articular Surface- media and lateral condyles

A

Medial condyle is concave both direction (larger than the lateral)

Lateral is convex sagittal and convex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what effect do the different condyle shapes have

A

affect the mechanic of the knee

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

3 joints on the knee

A

Tibiofemoral
Medial and lateral

Patellofemoral

Proximal tibiofibular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Function of Patellofemoral Joint

A

Increases the mechanical advantage of the quadriceps muscle

Protects the anterior knee

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

how does the Patellofemoral Joint Increases the mechanical advantage of the quadriceps muscle

A

By having patella, the quads get a better line of pulls to extend the knee, uses less force then if there was no patella

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Patellofemoral Joint- what type of joint

A

Modified plane joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what type of bone is the patella

A

sesamoid bone - lies within the quadriceps tendon

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

where does the patella sit

A

sits in trochlear groove of femur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Open packed position for the Patellofemoral Joint

A

full extension of the knee

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

in full extension of the knee is the patella touching the femur

A

patella not touching the femur – superior to the trochlear groove

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what position do we normally assess a joint

A

in the open packed position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Closed packed position for Patellofemoral Joint

A

full flexion

Patella fully engaged in the trochlear groove

(test- try to move patella in the knee completely flexed)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

for the closed packed position of the Patellofemoral Joint is this an are of max congruity

A

yes - unlike the hip

this is the standard

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Patellofemoral Motion

A

In flexion the patella is engaging with the femur – glides down the femur with flexion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

side to side movement of the patella

A

There is some side-to-side motion guided by the patella femoral ligaments and the ret

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Patellofemoral Tracking

A

how the patella slides in the trochlear groove during motion

the motion of the patella relative to the femur or femoral groove on knee flexion and extension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Knee flexion is what degreee of motion in the knee

A

0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

in complete knee flexion is the patella touching the femur

A

no - not at all

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

what happens to the patella as we start to flex the knee

A

the patella starts to interacting with the trochlear groove of the femur

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

at full flexion what part of the patella is tough the femur

A

odd facet - smashed in the femur

21
Q

what is the order of patella parts touching the femur during flexion

A

inferior to superior
distal to proximal

22
Q

size of the contact area no the patella as the knee flexes

A

Contact area becomes larger as knee is flexed

The bigger area to distributing forces the better the bone is handling those forces

23
Q

what happens to the patella when the quads are contracted

A

mashes the patella into femur

Quadriceps force creates patellofemoral compression force

24
Q

Magnitude of Quadriceps force on the patella depends on

A

Magnitude of force changes with knee flexion angle

25
Q

Q- angle

A

line through ASIS - center of the patella and another line from the tibial tubercle - the center of the patella

26
Q
  • Valgus
A

angle lateral to medially and then down (see above)
- Normally have little bit of this – 14 -17 degrees
- Bigger in women
- Knock knees: the knees are going inward

27
Q
  • Varus
A

bow legged, knees look further apart

28
Q
  • The natural valgus creates what
A

natural lateral pull on the patella

29
Q

q angle and injuries

A

might be the cause of some injuries

30
Q

Tibiofemoral Joint type of joint

A

Bicondylarsynovial joint

31
Q

Tibiofemoral Joint allows what kind of movement

A

Allows flex/ext, ER/IR

32
Q

Open-packed position Tibiofemoral Joint

A

30° flexion

Normally accessed at this angle

33
Q

Closed-packed position Tibiofemoral Joint

A

full extension
Most ligamentous lax
This is where we have the least amount of rotation- less tib femoral ration that we would in flex position

34
Q

what is a Capsular pattern

A

a joint-specific pattern of restriction

decrease in joint mobility occurs in a pattern

35
Q

when do we look at capsular patterns

A

to find out If something is capsule is patho
the pt should look at lose ROM in predictable pattern

If it not a capsule problem we will look at something that is not in the capsule like ligaments or tendons

36
Q

Capsular pattern of tin-femoral joint

A

flexion > extension restrictions

Lose more flex degrees the extension degrees

37
Q

Open Kinetic Chain of Tibiofemoral jt

A

Tibia moving on femur
Concave on convex  roll and glide SAME direction
Extension: Anterior roll, anterior glide
Flexion: Posterior roll, posterior glide

38
Q

Tibiofemoral jt Closed Kinetic Chain

A

Femur moving on tibia
Convex on concave  roll and glide OPPOSITE directions
Extension: Anterior roll, posterior glide
Flexion: Posterior roll, anterior glide

39
Q

“Screw Home” Mechanism part of what joint

A

Tibiofemoral

40
Q

“Screw Home” Mechanism-

A

There is an observable rotation of the knee during flexion and extension

41
Q

what causes screw home mech

A

Happens because the medial condyle of the femur is longer(extends more distally) then the lat

The lateral finished rolling and gliding and med is not done so it keeps rolling and gliding producing the rotation

The medial tibial plateau is larger so the med can keep going when the lat side is done

42
Q

WB screw home

A

10-15 degrees of lateral tibial rotation at end range extension

43
Q

WB screw home

A

10-15 degrees of femoral medial rotation at end range extension

44
Q

joint type Proximal Tibiofibular Joint

A

Plane synovial joint – flat on flat
Allows gliding and sliding

45
Q

how much weight can the tibialfemoral and proximities tibia joint bear

A

tibfib - 1/6 body weight
tibfemoral – 5/6 of body

46
Q

pain seen with proximities tbfib joint

A

knee and ankle pain

47
Q

Fibular Motion Anterior glide

A

ankle eversion

48
Q

Fibular Motion Posterior glide

A

Posterior glide accompanies ankle inversion

49
Q

what happens when fibular motion become hypomobile

A

Can become hypomobile and cause lateral knee pain after ankle sprains

Stiff - not moving at well

Anatomy LE (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions