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HUMB1002 > Week 3: Movements of the Knee > Flashcards

Week 3: Movements of the Knee Flashcards

1
Q
A
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2
Q

What type of joint is the knee joint?

A

Compound Condylar

  • Flexion-Extension
  • Rotation (only when flexed)
  • Glide, spin and roll
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3
Q

The movements of the knee are guided and limited by the cruciate ligaments and the menisci of the knee

A

The movements of the knee are guided and limited by the cruciate ligaments and the menisci of the knee

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4
Q

Function of Anterior Cruciate ligament?

A

Limits anterior displacement of the tibia on the femur or posterior rolling of the femoral condyles and posterior displacement of the femure on the tibia

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5
Q

Function of the Posterior Cruciate ligament

A

Limits posterior displacement of the tibia on the femur (or anterior rolling of the femoral condyles and anterior displacement of the femur on the tibia)

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6
Q

Menisci function?

A
  • deepen articulation
  • absorb shock
  • migrate to accomodate rollingand rotation of the femoral condyles
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7
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8
Q

Anterior cruciate ligament’s attachment points?

A
  • Anterior intercondylar area of the tibia
  • Posterior part of the medial side of the lateral femoral condyle
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9
Q

Posterior cruciate ligament’s attachments?

A
  • Posterior intercondylar area of the tibia
  • Anterior part of the medial surface of the media femoral condyle
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10
Q

Medial meniscus’ attachments

A
  • Anterior intercondylar area of tibia anterior to ACL
  • Posterior intercondylar area anterior to PCL
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11
Q

Lateral meniscus’ attachments

A
  • Intercondylar fossa lateral to ACL
  • Intercondylar fossa anterior to the medial mensicus
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12
Q

What stabilises the lateral aspect of the knee?

A

FCL and Iliotibial tract

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13
Q

Anterior stabiliser of the knee?

A
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14
Q

Posterior Stabilisers of the knee?

A
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15
Q

The joint capsule of the knee is stengthened by five extracapsular ligaments, what are they?

A
  • Fibular Collateral ligament
  • Tibial collateral ligament
  • Oblique popliteal ligament
  • Arcuate popliteal ligament
  • Patella ligament
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16
Q
A
17
Q

Sartorius’ attachments, function and nervouse supply?

A

P.A: anterior superior iliac spine
D.A: anterior aspect of medial condyle of tibia

Action: Syngergist for
hip flexion, abduction, lateral rotation and knee flexion (medial rotation with knee flexed)

NS: Femoral nerve

18
Q

Rectus Femoris Attachment, function and nervous supply

A

P.A: anterior inferior iliac spine
D.A: quadriceps tendon, patella, patella tendon and tibial tuberosity

A: Hip flexion and knee extension

N.S: Femoral Nerve

19
Q

Vastus Medialis Oblique Attachments, func and N.S?

A

P.A: intertrochantic line and medial lip of linea aspera of femur
D.A: quadriceps tendon, patella, patellor tendon and tibial tuberosity

A: Knee extension
N.S: Femoral nerve

20
Q

Vastus Lateralis attachments, func and N.S?

A

P.A: Greater trochanter and lateral lip of linea aspira
D.A: Quadriceps tendon, patella, patella tendon and tibial tuberosity

A: Knee extention

N.S: Femoral Nerve

21
Q

Vastus Intermedius attachments, function and N.S?

A

P.A: anterior and lateral sufaces of shaft of femur
D.A: quadriceps tendon, patella, patellar tendon and tibial tuberosity

A: knee extension

N.S: Femoral Nerve

22
Q

What are the inervations of the hamstrings?

A

They’re inervated by the tibial division of the sciatic nerve. The short head of the biceps femoris is inervated by the common fibular division of the sciatic nerve

23
Q

Ischial Tubersoity Muscle Quadrants

A
24
Q

Bicep Femoris Attach, func and N.S

A

Proximal:
Long head: Medial upper quadrant of ischial tuberosity
Short head: Linea aspera and lateral supracondylar line of femur
Distal: lateral side of head of fibula

Action: Hip extensiona and Knee flexion and lateral rotation

N.S: tibial and common fibular divisions of sciatic nerve

25
Q

Semitendinosus Attach, Fund and N.S?

A

P.A: medial inferior quadrant of ischial tuberosity
D.A: anterior surface of medial condyle of tibia

A: hip extension and knee flexion and medial rotation

N.S: tibial division of the sciatic nerve

26
Q

Semimembranosus Attach, Func and N.S

A

P.A: Upper lateral quadrant of ischial tuberosity
D.A: Posterior surface of medial condyle of tibia

A: hip extension and knee flexion

N.S: tibial division of sciatic nerve

27
Q

Pes Anserius what it is and its function?

A
  • It’s the common insertion of gracilis, sartorius and semitendinosus
  • Functions to stabilise the medial aspect of the extended knee
28
Q

Medial rotation of the knee:

Prime movers, angles and synergists?

A

Flexed knee: 10°
Extended knee: 5°

Prime movers of 1) Flexed Knee: Semimembranosus and semitendinosus
2) Extended Knee: Popliteus (Non WB) laterally rotates the femur when standing

Syngergists: Gracilis and Sartorius

29
Q

Lateral rotation of the knee:

Prime movers, angles and synergists?

A

Flexed Knee: 30°
Extended Knee: 0

Prime movers of Flexed Knee: Biceps Femoris

Synergists: Screw-home mechanism

30
Q

Open Kinetic vs closed Kinnetic?

A

Open Kinetic chain means the distal segment is free to move whereas in a Closed kinetic chain, the distal segment is fixed/stationary

31
Q

Locking of the knee in a closed kinetic chain

A
  • Last few degrees of extension
  • medial roation of the femur on tibia
  • Closed packed- screwed home
32
Q

Locking of the Knee in open kinetic chain

A
  • Last few degrees of extension
  • Lateral rotation of tibia on femur
33
Q

Unlocking of the knee in Closed Kinetic chain?

A
  • First few degrees flexion
  • lateral rotation of femur on tibia
  • Unlocked
34
Q

Unlocking of the Knee in Open Kinetic chain

A
  • First few degrees of flexion
  • Medial rotation of tibia on femur
  • Unlocked
35
Q
A

HUMB1002 (7 decks)

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