Question

your friend is standing at anatomical neutral. She exhibits 40° of flexion in the sagittal plane at the shoulder and 50° of flexion at the elbow. Assuming that her shoulder is at the origin, what is the position of her wrist along the axis, and the angle ? Assume the upper arm is 13” and the lower arm is 10” long. (Hint, remember which direction the angle should be measured from)

Answer 1

When the arm and forearm are held in the anatomic position, the antecubital surface facing anteriorly, the upper limb sweeps a circular surface in the frontal plane.

When the upper extremity is elevated to 90 degrees in the frontal plane, the distal point of the limb scans the horizontal plane and traces an arc of 165 degrees.

The average range of pronation- supination of the forearm with the elbow flexed at 90 degrees is 173 degrees measures at the levels of the hand.