review of the knee joint. name the ligament semitendinosus action: –flexion of the knee...
TRANSCRIPT
Review of the Knee Joint
Name the ligament
Semitendinosus• Action:
– Flexion of the knee– Internal rotation of the knee
Name the muscle and its action(s)
1. Vastus Medialis
2. Rectus Femoris
3. Vastus Lateralis
1.
3.
2.
Tibia & FibulaMedial condyleLateral condyleHead of fibula
? =? =? =
Sartorius
Action: Flexion at the knee
Name the muscle and its action
Semimembranosus
• Action: – Flexion of the knee– Internal rotation of the knee
Name the muscle and its action(s)
1. Anterior cruciate ligament
2. Lateral collateral ligament
3. Lateral meniscus4. Posterior cruciate
ligament5. Medial collateral
ligament6. Medial meniscus
1.
2.
3.
4.
5.
6.
Popliteus
• Action: – Flexion of knee– Internal rotation of the knee
Name the muscle and its action
2.
3.1.
1 = Lateral Meniscus2 = Patella3 = Medial meniscus
• Vastus medialis
• Rectus femoris
• Vastus lateralis
Name the colored muscles
1
23
Femur
? =? =? =
Lateral condyleMedial condyleIntercondylar fossa
Gracilis
Action - flexion at the knee
Name the muscle and its action
1.
2.
3.
1. = Vastus lateralis
2. = Rectus femoris
3. = Vastus medialis
What is the Q angle?
• The angle between the line of pull of the rectus femoris and the patellar ligament.
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
1.
2.
3.3.
4.
1. = Anterior cruciate ligament2. = Lateral collateral3. = Lateral meniscus3. = Medial collateral4. = Medial mieniscus
Name the muscles.
1.
2.
3.
1 = Vastus lateralis
2 = Vastus intermedius
3 = Vastus medialis
Fibula
Head Lateral malleolus
? =? =
1.Semitendonosis
2.Biceps femoris
3.Semimembranosis
Name the muscles
1.2.
3.
Biceps femoris• Action:
– Flexion of knee– External rotation of the knee
Name the muscle and its action
Tibia
Medial condyle
Lateral condyle
Tibial tuberosicty
? =? =? =
Name two functions of the menisci.
1.Stabilization2.Shock absorption3.Lubrication
Name the muscle and its action(s)
SartoriusAction: Flexion at the knee
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.
2.
1.
1 = Lateral meniscus2 = Medial meniscus
Femur1. Medial condyle2. Lateral condyle3. Intercondylar fossa
Popliteus
• Action: – Flexion of the knee– Internal rotation of the knee
Name the muscle and its action(s)
Tibia 1. 2.
1. Lateral condyle2. Medial condyle
Biceps femoris
Action: Flexion of kneeExternal rotation of the knee
Name the muscle and its action
FibulaHead HeadProximal
Distal
1.
2.
3.
• Action: – Extension of the knee
Name the muscles and its action
1. Vastus lateralis
2. Vastus intermedius
3. Vastus medialis
LIGAMENTS
1. ACL
2. Lat. Collat.
3. Lat. Men.
4. PCL
5. Med. Collat.
6. Med. Men.
1.
2.
3.
4.
5.
6.
Meniscus1. ACL
2. Lateral men.
3. PCL
4. Medial men.
1
24
3
Rectus femoris
• Action: – Extension of knee
Name the muscle and its action
QUESTIONS?