Limb, elbow and forehand all the parts of the hand that would be describe the different directional orientation terms if the subject is standing with the palms flat against the legs rather than in standard anatomical position.
Standing position determines the posture of human body. The entire bones together are known as skeleton system of the body. And this is skeleton system define the posture.
There are different parts from shoulder to the fingers present in the hand which does relative motion with respect to each other.