Knee Anatomy Quiz: Test Your Knowledge of Joint Function

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Questions and Answers

What is the normal angle of inclination of the proximal femur?

155 degrees

110 degrees

140 degrees

125 degrees (correct)

Which ligament resists valgus stress at the knee?

Anterior cruciate ligament

Medial collateral ligament (correct)

Posterior cruciate ligament

Lateral collateral ligament

What is the shape of the lateral meniscus?

Deeper and more circular (correct)

More mobile and less circular

Shallow and more oval

Semi-lunar (C shape)

Which ligament crosses the medial aspect of the knee and blends with the medial patella retinaculum?

Medial collateral ligament Signup and view all the answers

What is the function of the meniscus in the knee joint?

Accept/disperse compression in tibiofemoral joint Signup and view all the answers

What type of joint motion occurs in the knee joint?

Hinge joint with 2 degrees of freedom Signup and view all the answers

What is the primary function of the Posterior Cruciate Ligament (PCL)?

Resisting posterior translation of the tibia on the femur Signup and view all the answers

What is the role of the Patellofemoral Joint (PFJ) in the knee joint?

Creating a longer movement arm for the quadriceps Signup and view all the answers

What occurs between 90-60° flexion at the Patellofemoral Joint (PFJ)?

The patella is in contact with the femoral intracondylar groove Signup and view all the answers

What is the role of the Popliteus muscle in the knee joint?

Laterally rotates the femur on the tibia to unlock the knee Signup and view all the answers

What is the primary function of the Ankle joint (talocrural joint)?

Primarily shock absorption and conforming to ground forces Signup and view all the answers

What is the weight-bearing load distribution in the foot's mortise joint?

90% through the talus, tibia, and fibula; 10% through lateral structures Signup and view all the answers

What is the primary load-bearing and shock-absorbing structure of the foot?

Medial longitudinal arch Signup and view all the answers

Which motion occurs at the subtalar joint?

Pronation and supination Signup and view all the answers

What is the closed-packed position of the foot?

Supination Signup and view all the answers

Which joint accepts the majority of forces in closed-chain activities?

Talocrural joint Signup and view all the answers

What is the role of the plantar aponeurosis in foot biomechanics?

Assists in arch support Signup and view all the answers

What causes the longitudinal arch of the foot to rise during propulsion?

Tension on the plantar aponeurosis Signup and view all the answers

Which joint dictates motion at the midfoot in a closed-chain position?

Subtalar joint Signup and view all the answers

Study Notes

Proximal Femur

The normal angle of inclination of the proximal femur is 125°.

Knee Joint

The medial collateral ligament resists valgus stress at the knee.
The lateral meniscus is semicircular in shape.
The medial collateral ligament crosses the medial aspect of the knee and blends with the medial patella retinaculum.
The meniscus in the knee joint functions to distribute pressure, reduce friction, and absorb shock.
The knee joint operates through rolling-gliding motion.

Ligaments and Muscles

The primary function of the Posterior Cruciate Ligament (PCL) is to resist posterior translation of the tibia.
The Patellofemoral Joint (PFJ) helps to reduce friction and improve tracking of the patella during knee movement.
Between 90-60° flexion at the Patellofemoral Joint (PFJ), the quadriceps muscle contracts, and the patella glides inferiorly.
The Popliteus muscle unlocks the knee joint by rotating the tibia, allowing for full flexion.

Ankle Joint

The primary function of the Ankle joint (talocrural joint) is to allow for dorsiflexion and plantarflexion.

Foot Biomechanics

In the foot's mortise joint, the weight-bearing load is distributed 50% to the talus and 50% to the calcaneus.
The primary load-bearing and shock-absorbing structure of the foot is the midfoot.
The subtalar joint allows for inversion and eversion motions.
The closed-packed position of the foot is in subtalar neutral.
The ankle joint accepts the majority of forces in closed-chain activities.
The plantar aponeurosis in foot biomechanics helps to support the medial longitudinal arch and plantarflex the foot.
During propulsion, the longitudinal arch of the foot rises due to the plantar aponeurosis and flexor hallucis longus muscle.
The midtarsal joint dictates motion at the midfoot in a closed-chain position.

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Description

Test your knowledge of the knee joint with this quiz covering its functions, movements, and the influence of anatomy and muscles on its range of motion. Explore the key joints, motions, and forces involved in activities such as walking, running, and supporting body weight.

Knee Joint Function and Anatomy Quiz