Still unable to post picture. Best way to describe it is this...when your arms are by your sides, the palms of your hands are flat against the body facing inwards, not palm forwards. When you raise your arms and straighten your elbows, the hands are still in that position, not twisted upwards. It's actually quite unnatural to raise the arm palm up, especially from the elbow up, and requires some effort. While the shape of everyone's arms and elbows will vary, no one with 'normal' arms will have forward or upward facing palms when the arm is relaxed and raised. I really don't think you have anything to worry about with this part of your body.