Ulna & Radial Deviation. Ulna and radial deviation are the movements of tilting the wrist from one side to the other. Radial deviation is to move the thumb side of the hand down towards the wrist and ulna deviation is moving the little finger side down.1  To work on ulna deviation, the athlete holds a weighted bar in the hand with the arm by their side so that the palm faces inwards and the weight is at the back, as shown.lna and radial deviation are the movements of tilting the wrist from one side to the other.