ORIGIN-TERMINATION:Floor -- dactylion III, right.
PROCEDURE:Subject sits erect on a flat surface with the right arm and hand extended vertically overhead as far as possible, and the palm of the hand facing forward. The back does not touch the wall. Grasp the subject's wrist to guide the arm into a vertical position. Some subjects will not be able to fully extend the arm into this position without discomfort. In these cases, do not force the arm any higher than it can comfortably go without changing the position of the torso. The sitting surface and the subject are arranged so that the wall-mounted scale is at the subject's right side. Stand at the left of the subject and use a block to establish, on the wall- mounted scale, the vertical distance between the floor and the tip of the middle finger (dactylion III). The computer will subtract the height of the seat from this measurement. The measurement is made at the maximum point of quiet respiration.
CAUTION:Do not permit the subject to hyperextend the wrist.