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By Mayo Clinic staffNormal, healthy carotid arteries — like any other healthy artery — are smooth and flexible and provide a clear pathway for blood flow. If you place a finger under your jawbone, on either side of your Adam's apple, you're likely to feel your carotid artery pulse. Your carotid arteries carry oxygen- and nutrient-rich blood to your cerebral cortex and other vital brain structures, which are responsible for your day-to-day functioning.
Over time, however, the carotid arteries can become stiff and narrow due to a gradual accumulation of plaques, a process called atherosclerosis. Plaques consist of clumps of cholesterol, calcium, fibrous tissue and other cellular debris that gather at microscopic injury sites within the artery. When a lot of these plaques accumulate, narrowing the carotid artery and substantially restricting blood flow, doctors label this as carotid artery disease.
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