Review of the Knee Joint

1
Review of the Knee Joint
2
Name the ligament
3
Semitendinosus
Name the muscle and its action(s)

• Action
• Flexion of the knee
• Internal rotation of the knee

4
1.

1. Vastus Medialis
2. Rectus Femoris
3. Vastus Lateralis

2.
3.
5
Tibia Fibula
Medial condyle Lateral condyle Head of fibula
? ? ?
6
Sartorius
Name the muscle and its action

• Action Flexion at the knee

7
Semimembranosus
Name the muscle and its action(s)

• Action
• Flexion of the knee
• Internal rotation of the knee

8

1. Anterior cruciate ligament
2. Lateral collateral ligament
3. Lateral meniscus
4. Posterior cruciate ligament
5. Medial collateral ligament
6. Medial meniscus

1. 2. 3.
4.
5. 6.
9
Name the muscle and its action
Popliteus

• Action
• Flexion of knee
• Internal rotation of the knee

10
1 Lateral Meniscus 2 Patella 3 Medial
meniscus
1.
3.
2.
11
Name the colored muscles

• Vastus medialis
• Rectus femoris
• Vastus lateralis

2
3
1
12
Femur

• ?
• ?
• ?

Lateral condyle Medial condyle Intercondylar
fossa
13
Gracilis
Name the muscle and its action

• Action - flexion at the knee

14
2. 3.
1.

1. Vastus lateralis
2. Rectus femoris
3. Vastus medialis

15
What is the Q angle?

• The angle between the line of pull of the rectus
  femoris and the patellar ligament.

16
Review

• Define screw home movement.
• Locking of the knee during full extension and
  external rotation.
• Which type of rotation occurs during unlocking
  of the knee?
• Internal rotation and flexion

17
1. 2. 3.
3. 4.
1. Anterior cruciate ligament 2. Lateral
collateral 3. Lateral meniscus 3. Medial
collateral 4. Medial mieniscus
18
Name the muscles.
1. 2. 3.

• 1 Vastus lateralis
• 2 Vastus intermedius
• 3 Vastus medialis

19
Fibula

• Head
• Lateral malleolus

? ?
20
Name the muscles

• Semitendonosis
• Biceps femoris
• Semimembranosis

1.
3.
2.
21
Biceps femoris
Name the muscle and its action

• Action
• Flexion of knee
• External rotation of the knee

22
Tibia

• Medial condyle
• Lateral condyle
• Tibial tuberosicty

? ? ?
23
Name two functions of the menisci.

• Stabilization
• Shock absorption
• Lubrication

24
Sartorius
Name the muscle and its action(s)
Action Flexion at the knee
25
Questions

• What is a uniarticulate muscle?
• A muscle that crosses one joint
• What is a biarticulate muscle?
• A muscle that crosses two joints.
• What is a disadvantage of a biarticulate muscle?
• They are weaker during movement at both of the
  joints.

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1.
2.
1 Lateral meniscus 2 Medial meniscus
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Femur

• Medial condyle
• Lateral condyle
• Intercondylar fossa

28
Popliteus
Name the muscle and its action(s)

• Action
• Flexion of the knee
• Internal rotation of the knee

29
Tibia
1.
2.

1. Lateral condyle
2. Medial condyle

30
Name the muscle and its action
Biceps femoris
Action Flexion of knee External rotation of
the knee
31
Fibula
Head
Head
Proximal
Distal
32
Name the muscles and its action
1. 2. 3.

1. Vastus lateralis
2. Vastus intermedius
3. Vastus medialis

• Action
• Extension of the knee

33
LIGAMENTS
4.
1.

1. ACL
2. Lat. Collat.
3. Lat. Men.
4. PCL
5. Med. Collat.
6. Med. Men.

5.
2.
3.
6.
34
Meniscus

• ACL
• Lateral men.
• PCL
• Medial men.

1
4
2
3
35
Name the muscle and its action
Rectus femoris

• Action
• Extension of knee

36
QUESTIONS?