Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Carotid Artery Disease ?
    ### Response:
    Your carotid arteries are two large blood vessels in your neck. They supply your brain with blood. If you have carotid artery disease, the arteries become narrow, usually because of atherosclerosis. This is the buildup of cholesterol and other material in an artery.
    