Aren't the veins closer to the surface on medial?
The pitman arm is the arm connected to the steering box sector shaft that moves side to side to steer the wheels.
the top of the side arm turns to release the reclining mechanism.
Lateral, means to the side, so I would think that the arm is on the side of the torso (body).
anterior superior potions of the arm
The brachial pulse located on the upper arm on the side closest to the body between the muscle.
side
The muscle in your arm contracts. The muscle on the other side of your arm, opposite from the side that you are flexing, stretches.
d
lateral motion.
on the thumb side of the arm
Loss of lymph nodes from surgery on the affected side often causes poor drainage from the arm on that side. This is why there can be hand and arm swelling.