Baroreceptors

(redirected from baroreceptor)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Baroreceptors

 

(baroceptors, mechanoreceptors, and pressoreceptors), sensory nerve terminals in blood vessels that perceive changes in blood pressure and reflexly regulate its level. Baroreceptors become stimulated when the walls of the vessels distend. They are found in all vessels but are concentrated mainly in reflexogenic zones (such as cardiac, aortic, carotid sinus, and pulmonary). When blood pressure rises, baroreceptors send impulses to the central nervous system that decrease the tonus of the vascular center and excite the central formations of the parasympathetic division of the autonomic nervous system, and result in a lowering of the pressure. After a frequent and prolonged rise in blood pressure, the baroreceptors adapt to it and thereby may be one of the causes of hypertension.

G. N. KASSIL’

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Cardiopulmonary baroreceptors trigger a reflex that causes vasoconstriction when the right atrial transmural pressure (RATP) decreases and vasodilation when RATP increases.
The aging process is associated with alterations in autonomic cardiovascular control, leading to reduced vagal tonus, increased sympathetic tone, and attenuation of autonomic regulatory mechanisms such as baroreceptors (33) and endothelial dysfunction, which may lead to a decrease in vasomotor tone and blood flow due to the dysfunction responding positively to nitric oxide, in addition to its reduced synthesis (1,31).
Incremental evidence indicates that the NTS is involved in mediating the central interaction between baroreceptor and somatosensory receptor inputs [13,14, 36, 37].
In epileptic patients with drug refractory seizures who underwent intracarotid amobarbital injections (wada test), it was noticed sympathetic tonus predominance in the right hemisphere and parasympathetic predominance and up-regulation of baroreceptor sensitivity in the left hemisphere [28].
However, it is extremely rare for multinodular goiter to cause carotid baroreceptor hypersensitivity leading to symptomatic sinus pauses and bradycardia.
Pan, "Identification of neural firing patterns, frequency and temporal coding mechanisms in individual aortic baroreceptors," Frontiers in Computational Neuroscience, vol.
The baroreceptor reflex (BRR) is another method that can be used for detecting CAN.
Stojicic, "Temporal analysis of the spontaneous baroreceptor reflex during mild emotional stress in the rat," Stress, vol.
The medication was shown to improve standing heart rate, standing blood pressure, and baroreceptor sensitivity (Kanjwal et al., 2012).
An implantable device for the bilateral electric baroreceptor stimulation that decreases the sympathetic tone alleviates the obesity associated hypertension in experimental and clinical settings (Lohmeier et al 2012; Biaggioni 2012).
The MobiusHD System capitalises on the ability of the body's baroreceptor mechanism to regulate blood pressure.