Knee Articulations

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Knee

Flexion

Bending the joint resulting in a decrease of angle; moving the lower leg toward the back of the thigh.
Knee Flexion

Extension

Straightening the joint resulting in an increase of angle; moving the lower leg away from the back of the thigh.
Knee Extension

Medial Rotation (Internal Rotation)

Rotary movement around the longitudinal axis of the bone toward the center of the body; with the knee bent, turning the lower leg inward.
 

Lateral Rotation (External Rotation)

Rotary movement around the longitudinal axis of the bone away from the center of the body; with the knee bent, turning the lower leg outward.
 

Notes

Mentioned articulations occur during concentric phase of exercise video examples.


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