Definition of piece rate: Payment by results. Wage determination system in which the employee is paid for each unit of production at a fixed rate.
The main arteries in the neck are the common carotids arising differently, one on each side (see the images below). On the right, the common carotid arises at the bifurcation of the brachiocephalic trunk behind the sternoclavicular joint; on the left, it arises from the highest point on arch of the aorta in the chest.
Carotid artery stenosis is a narrowing in the large arteries located on each side of the neck that carry blood to the head, face and brain. The narrowing usually results from atherosclerosis, or a build-up of plaque on the inside of the arteries. Over time, stenosis can advance to complete blockage of the artery.