The Elbow

Resisted Supination in extension

Technique

First the supination is executed as in he basic functional examination with the elbow bent to 90°.
Then the arm is brought into extension and the supination against resistance is performed again.
The hands are placed in the same position as for the basic functional examination:
The ipsilateral hand carries the forearm and resistance is given with the thenar of the ipsilateral hand and the hypothenar of the other hand respectively.

Indications

To differentiate between lesions of the brachial biceps and the supinator muscle:
When the arm is brought into extension, the action of the biceps is
diminished considerably but the supinator contracts normally.