نتایج جستجو برای: sympathetic nerves

تعداد نتایج: 55045  

Journal: :The Journal of physiology 2007
Jinwoo Park James J Galligan Gregory D Fink Greg M Swain

As arteries are resistance blood vessels while veins perform a capacitance function, it might be expected that sympathetic neural control of arteries and veins would differ. The function of sympathetic nerves supplying mesenteric arteries (MA) and veins (MV) in rats was investigated using in vitro continuous amperometry with a carbon fibre microelectrode and video imaging. We simultaneously mea...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1982
K Koizumi N Terui M Kollai C M Brooks

Simultaneous recording of activity in the vagal and sympathetic supplies to the heart has revealed that in reflexly and centrally evoked activity these two "antagonists" do not necessarily change action reciprocally. Coactivation occurs in chemoreceptor reflexes and related reactions, upon stretching of the sinoatrial nodal region of the right atrium and when certain hypothalamic regions are st...

Journal: :Current cardiology reports 2012
Paul A Sobotka Henry Krum Michael Böhm Darrel P Francis Markus P Schlaich

The heart and kidney interact in terms of hemodynamics and neurohumoral regulatory mechanisms, and this helps to maintain circulatory homeostasis under normal conditions. However, the normal regulatory mechanisms become inappropriate in the setting of congestive heart failure (CHF), and significant renal dysfunction often develops in CHF patients. Activation of renal sympathetic efferent nerves...

2013
C. Crawford S. S. P. Wildman M. C. Kelly T. M. Kennedy-Lydon C. M. Peppiatt-Wildman

Pericyte cells are now known to be a novel locus of blood flow control, being able to regulate capillary diameter via their unique morphology and expression of contractile proteins. We have previously shown that exogenous ATP causes constriction of vasa recta via renal pericytes, acting at a variety of membrane bound P2 receptors on descending vasa recta (DVR), and therefore may be able to regu...

Journal: :Hypertension 2021

Overactivity of renal sympathetic nerves and nitric oxide (NO) deficiency occur in hypertensive chronic kidney disease (CKD). In sheep with CKD NO deficiency, denervation (RDN) reduces blood pressure improves function (glomerular filtration rate). We hypothesized that this improvement glomerular rate after RDN is associated increased bioavailability. study, response to systemic inhibition NOS (...

2015
Alicia M. Schiller Peter R. Pellegrino Irving H. Zucker

The function of the renal nerves has been an area of scientific and medical interest for many years. The recent advent of a minimally invasive catheter-based method of renal denervation has renewed excitement in understanding the afferent and efferent actions of the renal nerves in multiple diseases. While hypertension has been the focus of much this work, less attention has been given to the r...

Amirhooshang Ansari, Maede Shokri, Negin Nejadali, Shamime Asadi,

Tooth pulpal nerves include sympathetic and sensory nerves that originate from trigeminal ganglion .From the terminal of these sensory nerves neuropeptides are secreted that are neuromodulators and neurotransmitters. One of them is CGRP (Calcitonin gene-related protein) which has a vasodilatory effect on pulpal vessels. Near abscess and moderate injuries, this neuropeptide can lead to neural fi...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2003
Hideyuki Terazono Tatsushi Mutoh Shun Yamaguchi Masaki Kobayashi Masashi Akiyama Rhyuta Udo Shigehiro Ohdo Hitoshi Okamura Shigenobu Shibata

A main oscillator in the suprachiasmatic nucleus (SCN) conveys circadian information to the peripheral clock systems for the regulation of fundamental physiological functions. Although polysynaptic autonomic neural pathways between the SCN and the liver were observed in rats, whether activation of the sympathetic nervous system entrains clock gene expression in the liver has yet to be understoo...

Journal: :Clinical and experimental pharmacology & physiology 2004
Gabriela A Eppel Simon C Malpas Kate M Denton Roger G Evans

There is strong evidence that the renal medullary circulation plays a key role in long-term blood pressure control. This, and evidence implicating sympathetic overactivity in development of hypertension, provides the need for understanding how sympathetic nerves affect medullary blood flow (MBF). The precise vascular elements that regulate MBF under physiological conditions are unknown, but lik...

Journal: :Journal of applied physiology 2004
Paul J Fadel David M Keller Hitoshi Watanabe Peter B Raven Gail D Thomas

The precise role of the sympathetic nervous system in the regulation of skeletal muscle blood flow during exercise has been challenging to define in humans, partly because of the limited techniques available for measuring blood flow in active muscle. Recent studies using near-infrared (NIR) spectroscopy to measure changes in tissue oxygenation have provided an alternative method to evaluate vas...

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