Opposite Side
While the subject still lays on the chair, slide the chair away from the dynamometer and rotate the
former to the other side
Adjust the chair and the dynamometer to align the dynamometer axis with the joint rotation axis
3.5.2 Pronation – Supination
Rotation Axis:. The axis of rotation bisects the head of the ulna distally
and the head of the radius proximally.
Anatomical Zero: Thumb pointing upwards
Range of Motion: Normal ROM is 80 degrees in pronation and
80 degrees in supination. However a ROM of 30/0/30is considered
Adequate for isokinetic testing
Isoforce offers one positioning possibility, in seated position.
Muscles Involved: Pronator teres and pronator quadratus are responsible for the pronation. The
muscles that supinate the forearm are biceps brachii, brachioradialis, and the supinator.
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