Dorsal - the posterior surface of the hand. Radial and ulnar are preferred because of the confusion over medial and lateral. Pronation - the act of turning the hand so that the palm faces downward or backwards. The hand is supplied by three nerves - the median, the ulnar, and the radial nerves. With no more than a paperclip an accurate test for sensation can be carried out.
Sensation is tested using the two - point discrimination test.
Use a paper clip with the points 5mm apart. Press lightly against the skin, just enough to dent the skin along the sides of the fingers never across the finger. Tenderness, swelling, heat, crepitus. Thumb has 4 movements - up, down, and side to side. Grip strength - patient squeezes your two fingers in his hand.