3.3 Knee Joint
Although the knee joint may look like a simple joint, it is one of the most complexes. It consists of 4
bones and an extensive network of ligaments and muscles. Moreover, the knee is more likely to be
injured than is any other joint in the body.
3.3.1 Knee Extension – Flexion
Rotation Axis: Along the long axis of the femur
Anatomical Zero: Straight leg in neutral position
Range of Motion: Physiological ROM is 45 degrees in internal and
45 degrees in external rotation. However, in isokinetic testing up to
10 degrees in internal and up to 25 degrees in external rotation is suggested.
Isoforce offers one positioning possibility, in supine position.
Muscles Involved: Obturators and Gluteals
Seated
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