Fig. 4

C-Fingers comparative test. Clinical image of the C-Fingers comparative test: the arm lies on a table, with elbow flexed at 90° and forearm vertical to the floor plane. With the thumb opposite to other fingers (forming the shape of a “C” letter) the surgeon squeezes the forearm space and pushes alternatively in dorsal and palmar direction to feel the muscular-IOM resistance in pronation and supination; the test must be comparative and is generally hindered by muscular hypertrophy and edema