Knee Joint Movement and Kinematic Chains

What happens to the tibia during nonweight-bearing extension?

It moves in the opposite direction of the bone motion

It rotates laterally on the femur (correct)

It rotates medially on the femur

It remains stationary on the femur

What is the result of the screw-home mechanism during terminal extension?

The hip flexes

The femur rotates internally (correct)

The femur rotates externally

The tibia rotates medially

What occurs concurrently with terminal extension of the knee?

Knee unlocking

Hip extension (correct)

Hip flexion

Tibia rotation

What is the function of the iliofemoral ligament during hip extension?

It reinforces medial rotation of the femur Signup and view all the answers

What is the direct cause of knee unlocking?

Action of the popliteus muscle Signup and view all the answers

What is the direction of condyle slide during femur motion on a fixed tibia?

In the opposite direction of the bone motion Signup and view all the answers

What is the primary goal of controlled motion exercises?

To safely return to desired functional activities Signup and view all the answers

Why is it important to maintain strength in supporting muscles?

To protect and stabilize the joint Signup and view all the answers

What is the purpose of educating the patient?

To inform about the condition and recovery Signup and view all the answers

What is the benefit of using elevated seats on commodes and chairs?

To reduce mechanical stresses Signup and view all the answers

What type of exercises have been shown to improve functional outcomes in patients with OA?

Exercises that include strengthening, stretching, ROM, and stationary bicycle use Signup and view all the answers

Why are balance exercises important?

To reduce the incidence of falls Signup and view all the answers

What is the primary goal of instructing patients with OA or RA to perform active ROM and muscle-setting techniques?

To reduce painful symptoms that occur with initial weight bearing Signup and view all the answers

What is the recommended approach for patients with OA or RA?

Alternate activity with rest Signup and view all the answers

What was the primary outcome measure used in a randomized controlled study on patients with knee OA?

Distance walked in 6 minutes Signup and view all the answers

What is a precaution to consider when increasing joint range of motion?

Ensure the patient has sufficient strength to control the motion Signup and view all the answers

What type of techniques should be used for joint mobilization?

Grade III or IV sustained or oscillatory techniques Signup and view all the answers

In which joint positions should joint mobilization techniques be applied?

At the end of the available range Signup and view all the answers

What is increased hip adduction related to in females?

Increased knee valgus Signup and view all the answers

What is a neuromuscular risk factor that influences joint position and movement?

Neuromuscular control Signup and view all the answers

What is a structural risk factor that may affect ACL size?

Femoral notch size Signup and view all the answers

What is a difference in the ACL between males and females?

The female ACL is smaller than the male ACL Signup and view all the answers

What is a difference in muscle strength between males and females?

Females are weaker in hip and knee strength compared to males Signup and view all the answers

What is valgus collapse at the knee related to in females who have sustained an ACL injury?

Decreased use of the hip extensors Signup and view all the answers

What was the outcome of aerobic fitness at the 18-month follow-up in both groups?

It declined Signup and view all the answers

What is recommended as a nonpharmacological intervention to improve functional capacity of patients with symptomatic OA?

Referral to physical therapy services Signup and view all the answers

What factors determine the surgical procedure selected for managing knee arthritis?

All of the above Signup and view all the answers

When does functional ability typically surpass the preoperative level after arthroscopic débridement and lavage?

At 3 months Signup and view all the answers

What may have contributed to the postoperative group's functional limitations?

General physical deconditioning Signup and view all the answers

What is the primary goal of surgical options for managing knee arthritis?

To improve functional capacity of patients with knee arthritis Signup and view all the answers