Podcast
Questions and Answers
What are the functions of the knee?
What are the functions of the knee?
Acts as a lever for propulsion, posture, and balance, facilitates force from the lower kinetic chain to movement, weight and load bearing.
From the front, how can you differentiate between the left and right knees?
From the front, how can you differentiate between the left and right knees?
- The patella on the left knee is anterior, the fibula is medial, and the tibia is lateral.
- The patella on the right knee is anterior, the fibula is lateral, and the tibia is medial. (correct)
- The patella on the right knee is anterior, the fibula is medial, and the tibia is lateral.
- The patella on the left knee is anterior, the fibula is lateral, and the tibia is medial.
Which bones are involved in the knee joint?
Which bones are involved in the knee joint?
- Femur, patella, ulna, and fibula.
- Femur, patella, tibia, and radius.
- Femur, patella, tibia, and humerus.
- Femur, patella, tibia, and fibula. (correct)
How many joints are present at the knee? What are they?
How many joints are present at the knee? What are they?
List the seven connective tissues found at the knee joint.
List the seven connective tissues found at the knee joint.
What is the function of the lateral collateral ligament (LCL)?
What is the function of the lateral collateral ligament (LCL)?
What is the function of the medial collateral ligament (MCL)?
What is the function of the medial collateral ligament (MCL)?
Explain the functions of the meniscus within the knee joint.
Explain the functions of the meniscus within the knee joint.
Describe the connection of the patellar tendon.
Describe the connection of the patellar tendon.
What are the four movements possible at the knee joint?
What are the four movements possible at the knee joint?
What muscle group causes knee extension?
What muscle group causes knee extension?
Which muscle group is responsible for knee flexion?
Which muscle group is responsible for knee flexion?
Explain the concept of biarticular muscles.
Explain the concept of biarticular muscles.
Which muscles contribute to knee flexion?
Which muscles contribute to knee flexion?
Which muscles are involved in knee extension?
Which muscles are involved in knee extension?
Which muscles contribute to internal rotation of the knee when it is flexed?
Which muscles contribute to internal rotation of the knee when it is flexed?
Which muscle causes external rotation of the knee when it is flexed?
Which muscle causes external rotation of the knee when it is flexed?
What is the Q angle, and why is it important?
What is the Q angle, and why is it important?
What is Osgood-Schlatter disease, and what causes it?
What is Osgood-Schlatter disease, and what causes it?
What activities can lead to a patellar tendon rupture?
What activities can lead to a patellar tendon rupture?
Flashcards
Function of the Knee
Function of the Knee
Acts as a lever for propulsion, posture, and balance; facilitates force from the lower kinetic chain to movement; and bears weight and loads.
Identifying the Right Knee
Identifying the Right Knee
For the RIGHT knee:
- Patella is anterior (front)
- Fibula is lateral (outer side)
- Tibia is medial (inner side)
Bones at the Knee
Bones at the Knee
Femur, patella (sesamoid bone), tibia, and fibula (doesn't articulate at the knee).
Study Notes
Knee Function and Anatomy
- The knee acts as a lever for movement, balance, and weight-bearing, transferring force from the lower body.
- The patella is anterior, the fibula is lateral, and the tibia is medial when viewing the right knee from the front.
- The knee joint is comprised of the femur, patella (sesamoid bone), tibia, and fibula (not directly articulating with the femur).
- Three joints exist within the knee: tibiofemoral (modified hinge), patellofemoral, and proximal tibiofibular.
- Seven connective tissues support the knee: anterior cruciate ligament (ACL), posterior cruciate ligament (PCL), lateral meniscus, medial meniscus, lateral collateral ligament (LCL), medial collateral ligament (MCL), and patellar tendon.
Ligament Functions
- The LCL prevents varus (lateral) movement of the knee.
- The MCL prevents valgus (medial) movement of the knee.
- Menisci act as shock absorbers, protect underlying tissues, and reduce friction within the joint.
- The patellar tendon attaches the quadriceps muscle to the tibial tuberosity.
Muscle Actions and Movements
- Muscle groups in the knee are responsible for flexion (posterior) and extension (anterior) movements, and internal/external rotation when flexed.
- The quadriceps femoris muscle group (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) is responsible for knee extension.
- The hamstring muscles (biceps femoris, semitendinosus, semimembranosus), popliteus, gastrocnemius, sartorius, and gracilis are responsible for knee flexion.
- Internal rotation of the flexed knee is primarily performed by the sartorius, gracilis, semitendinosus, and semimembranosus.
- External rotation of the flexed knee is primarily performed by the biceps femoris.
Joint Angles and Injuries
- The Q-angle, formed by the quadriceps and patellar tendon, is larger in women due to wider pelvises, potentially increasing injury risk.
- Osgood-Schlatter disease involves traction periostitis of the tibial tuberosity; caused by overuse and repetitive stress.
- Patellar tendon rupture can occur from high-impact activities, such as jumping and lunging.
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Description
Test your knowledge on the anatomy and function of the knee joint, including its structural components and ligament functions. This quiz covers the basic mechanics of the knee, the roles of connective tissues, and joint classifications.
