carotid-, caroti-, carotio-

(Greek: karos, deep sleep, drowsiness; the great arteries of the neck)

assessment of carotid pulse
A determination of the pulse of the carotid artery, palpated (gently touched) by gently pressing a finger in the area between the larynx and the sternocleidomastoid muscle in the neck which turns or rotates the head.
A reference to an internal carotid artery and a clinoid process (applied to several processes on the inner side) of the sphenoid (wedge-shaped) bone or the butterfly-shaped bone at the base of the skull.
Referring to the carotid canal and the tympanum or the membrane in the eardrum or the cavity of the middle ear.
caroticotympanic canals
Two or three short canals extending from the carotid canal to the tympanic (ear drum) cavity.
carotid (singular)
1. Either of the two major arteries, one on each side of the neck, that carry blood to the head.
2. Referring to or relating to, the right and left common carotid arteries, which comprise the principal blood supply to the head and the neck.

The left artery goes up directly from the aorta and the right one goes from the brachiocephalic (involving the arm and the head) artery. Each of these two arteries divides to form external and internal carotid arteries.

3. Etymology: from the Greek karotides, plural of karotis, from karoun, "to plunge into a deep sleep" or "into a stupor" via French or modern Latin carotide; since compression of these arteries was believed to cause unconsciousness (Galen).

If this is folk etymology, as some etymologists indicate, the Greek word could be from kara, "head".

carotid aneurysm
An aneurysm of the carotid artery which is a weak area in the wall of a blood vesel that causes the blood vessel to bulge or to balloon out.
carotid arch
The third arch of the aorta which is the source of the common carotid arteries.
carotid artery disease
A condition in which the carotid arteries become narrowed or blocked.

When the arteries become narrowed, the condition is called carotid stenosis.

Carotid artery disease takes place when sticky, fatty substances called plaque build up in the inner lining of the arteries.

carotid artery duplex scanning
A noninvasive ultrasound test for occlusive disease (closure or blockage) of the extracranial (outer skull) carotid artery.
carotid artery insufficiency syndrome
Contralateral (opposite side) weakness and numbness, aphasia, and ipsilateral (same side) monocular blindness as a result of atherosclerosis (thickening and hardening of the walls of arteries as a result of fat deposits on their inner lining) or other lesion causing obstruction of an internal carotid artery or one of its major banches.
carotid artery, carotid arteries
1. The common carotid artery or either of its branches, the external and internal carotid arteries.
2. Specifically, the common carotid artery, the principal artery on either side of the neck.
carotid body
1. A flat structure at the bifurcation (forked or divided into two parts or branches) of the common carotid artery.

It contains cells that respond to changes in oxygen concentration in the blood and to changes in blood pressure.

2. A small structure containing neural tissue at the bifurcation (two branches) of the carotid arteries.

It monitors the pressure and oxygen content of the blood and, therefore, it assists in regulating respiration or breathing.

carotid bruit
1. A murmur heard in the cervical area that does not disappear with venous compression, is maximal over the carotid bifurcation, and is not a result of transmitted cardiac murmurs.

Bruit refers to a medically significant sound heard inside the body; usually, with the aid of a stethoscope, and caused by turbulent blood flow within the heart or blood vessels.

The presence of asymptomatic carotid bruits increases when people get older, but it is not normally associated with increased risk for stroke in elderly patients.

2. A murmur heard over the carotid artery in the neck, suggesting arterial narrowing and usually occurring secondary to atherosclerosis.

A stroke could take place if the narrowing is severe and the condition is untreated.

carotid duplex scanning
A noninvasive ultrasound test used on the extracranial carotid artery to detect occlusive disease directly.

It is recommended for patients with headaches and neurologic symptoms such as transient ischemic attacks, hemiparesis, paresthesia, and acute speech or visual defects.

carotid endarterectomy
Endarterectomy (a surgical procedure designed to clean out material occluding an artery) done on the carotid artery (a major artery in the neck that supplies blood to the brain) to restore normal blood flow through it to the brain and to prevent a stroke.