carotid body


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Related to carotid body: aortic body, carotid body tumor

ca·rot·id bod·y

[TA]
a small epithelioid structure located just above the bifurcation of the common carotid artery on each side. It consists of granular principal cells and nongranular supporting cells, a sinusoidal vascular bed, and a rich network of sensory fibers of the glossopharyngeal nerve. It serves as a chemoreceptor organ responsive to lack of oxygen, excess of carbon dioxide, and increased hydrogen ion concentration.

carotid body

n.
A chemoreceptor that is a body of vascular tissue near the bifurcations of the carotid arteries. It monitors changes in the oxygen content of the blood and helps to control respiratory activity.

carotid body

Etymology: Gk, karos + AS, bodig
a small structure containing neural tissue at the bifurcation of the carotid arteries. It monitors the pressure and oxygen content of the blood and therefore assists in regulating respiration.

ca·rot·id bod·y

(kă-rot'id bod'ē) [TA]
A small epithelioid structure located just above the bifurcation of the common carotid artery on each side. It serves as a chemoreceptor organ responsive to oxygen lack, carbon dioxide excess, and increased hydrogen ion concentration.
Synonym(s): intercarotid body.

carotid body

A chemical receptor, situated at the first branch of each carotid artery, that monitors oxygen levels in the blood and regulates the rate of breathing accordingly.
Carotid bodyclick for a larger image
Fig. 93 Carotid body . Location.

carotid body

an area of gland-like tissue situated near the joining of the external CAROTID ARTERY to the common carotid which acts as a CHEMORECEPTOR (see Fig. 93. When blood-oxygen concentration levels are low and/or the concentration of carbon dioxide is high, the carotid body is stimulated to produce nervous impulses which are transmitted to the respiratory centre in the hindbrain, thus influencing BREATHING rate and, in turn, heart rate.

ca·rot·id bod·y

(kă-rot'id bod'ē) [TA]
Small epithelioid structure located just above the bifurcation of the common carotid artery on each side.

carotid

relating to the carotid artery, the principal artery of the neck. See Table 9.

carotid body
a small neurovascular structure lying in the bifurcation of the common carotid arteries, containing chemoreceptors that monitor oxygen content in blood and help to regulate respiration. Called also glomus caroticum.
carotid body tumors
usually unilateral nonfunctional adenoma, chemodectoma, nonchromaffin paraganglioma, or locally invasive carcinoma which may cause deviation of the trachea.
carotid canal
transmits the internal carotid artery to the cranial cavity through the pars petrosa of the temporal bone.
carotid sheath
contains the common carotid artery, internal jugular vein and vagosympathetic trunk.
carotid sinus
a dilatation of the proximal portion of the internal carotid or distal portion of the common carotid artery, containing in its wall pressoreceptors which are stimulated by changes in blood pressure.
carotid sinus reflex
slowing of the heart rate when pressure is applied over the carotid sinus.
carotid sinus syndrome
syncope sometimes associated with convulsive seizures due to overactivity of the carotid sinus reflex.
References in periodicals archive ?
Carotid body tumors grow slowly and remain asymptomatic until they reach up to a certain size.
A carotid body tumor usually presents headache or neck pain in 35%, dizziness in 8%, hoarseness in 8% and dysphagia in 8% of patients.
Cibiem is a medical device company leveraging its proprietary, minimally invasive, catheter-based approach focused on Carotid Body Modulation[TM] (CBM) for the treatment of sympathetic nervous system-mediated diseases such as hypertension, heart failure, diabetes and renal failure.
Carotid body tumor (CBT), first described by von Luschka, 1862 is a rare lesion of the neuroendocrine system.
MRI with magnetic resonance angiography demonstrated the characteristic imaging findings of a carotid body tumour.
The observation made in the present study suggests the involvement of afferent limb of parasympathetic reflex arc which consists of carotid body chemoreceptors, tenth cranial nerve and cardiovascular receptors in medulla.
Patients with a carotid body paraganglioma have the best outcome, whereas those with skull base tumors have a less favorable prognosis because of the increased difficulty in achieving total resection.
INTRODUCTION: Carotid body tumors (CBT) are distinctly uncommon hypervascular neck tumors.
Magnetic resonance imaging of the head and neck demonstrated multiple skull base lesions consistent with bilateral carotid body tumors, a left glomus jugulare, and a right glomus vagale.
In the poststyloid space, they are associated with the carotid body, the jugular bulb, or the vagus nerve.