keyword
MENU ▼
Read by QxMD icon Read
search

Vagal nerve

keyword
https://www.readbyqxmd.com/read/29330080/use-of-a-pulsed-radiofrequency-energy-device-peak-plasmablade%C3%A2-in-neuromodulation-implant-revisions
#1
I Ughratdar, K A Kawsar, R Mitchell, R Selway, K Ashkan
BACKGROUND: Battery replacement or revision surgery for neuromodulation implants is conventionally performed using sharp dissection. Meticulous dissection within thick scar tissue is vital to avoid damage to surrounding lead(s) which could result in more extensive revision surgery. Traditional electrosurgery devices are contraindicated as the emitted energy can be transferred to the hardware resulting in implant or tissue damage with severe consequent complications. OBJECTIVE: We report our experience and potential applications of a novel, pulsed monopolar radiofrequency energy device (PEAK PlasmaBlade™, Medtronic plc) which facilitates dissection around implants without the risk of damaging or transmitting energy through the system...
January 9, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29323403/-ultrasound-study-of-the-vagal-nerve-as-a-diagnostic-tool-in-guillain-barre-syndrome
#2
L Rojas-Bartolome, J M Pardal-Fernandez, J Garcia-Garcia, O Ayo-Martin, M Fernandez-Valiente, C M Romero-Sanchez, T Segura
No abstract text is available yet for this article.
January 16, 2018: Revista de Neurologia
https://www.readbyqxmd.com/read/29319940/medical-devices-neurological-devices-classification-of-the-external-vagal-nerve-stimulator-for-headache-final-order
#3
(no author information available yet)
The Food and Drug Administration (FDA or we) is classifying the external vagal nerve stimulator for headache into class II (special controls). The special controls that apply to the device type are identified in this order and will be part of the codified language for the external vagal nerve stimulator for headache's classification. We are taking this action because we have determined that classifying the device into class II (special controls) will provide a reasonable assurance of safety and effectiveness of the device...
December 27, 2017: Federal Register
https://www.readbyqxmd.com/read/29315578/hcn4-pacemaker-channels-attenuate-the-parasympathetic-response-and-stabilize-the-spontaneous-firing-of-sinoatrial-node
#4
Yuko Kozasa, Noriyuki Nakashima, Masayuki Ito, Taisuke Ishikawa, Hiroki Kimoto, Kazuo Ushijima, Naomasa Makita, Makoto Takano
The heart rate is dynamically controlled by the sympathetic and parasympathetic nervous systems that regulate the sinoatrial node (SAN). HCN4 pacemaker channels are well-known causative molecule of congenital sick sinus syndrome. Although HCN4 channels are activated by cAMP, the sympathetic response of SAN was preserved in the patients carrying loss-of-function mutations of HCN4 gene. In order to clarify the contribution of HCN4 channels in the autonomic regulation of SAN, we developed novel gain-of-function mutant mice in which expression level of HCN4 channels could be reversibly changed from zero to ∼3 times of that in wild type mice, using tetracycline trans-activator and tetracycline responsive element...
January 9, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29306061/structure-of-vagal-afferent-nerve-terminal-fibers-in-the-mouse-trachea
#5
Michal Hennel, Jana Harsanyiova, Fei Ru, Tomas Zatko, Mariana Brozmanova, Alzbeta Trancikova, Milos Tatar, Marian Kollarik
The structure of primary afferent nerve terminals profoundly influences their function. While the complex vagal airway nerve terminals (stretch receptors, cough receptors and neuroepithelial bodies) were thoroughly characterized, much less is known about the structure of airway nerves that do not form distinct complex terminals (often termed free nerve fibers). We selectively induced expression of GFP in vagal afferent nerves in the mouse by transfection with AAV-GFP virus vector and visualized nerve terminals in the trachea by whole organ confocal imaging...
January 3, 2018: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29303111/chronic-implantation-of-cuff-electrodes-on-the-pelvic-nerve-in-rats-is-well-tolerated-and-does-not-compromise-afferent-or-efferent-fibre-functionality
#6
Jonathan J Crook, Charly Brouillard, Pedro Irazoqui, Thelma Lovick
Objective Neuromodulation of autonomic nerve activity to regulate physiological processes is an emerging field. Vagal stimulation has received most attention whereas the potential of modulate visceral function by targeting autonomic nerves within the abdominal cavity remains under-exploited. Surgery to locate intra-abdominal targets is inherently more stressful than for peripheral nerves. Electrode leads risk becoming entrapped by intestines and loss of functionality in the nerve-target organ connection could result from electrode migration or twisting...
January 5, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29298212/electrophysiology-of-cranial-nerve-testing-cranial-nerves-ix-and-x
#7
Alberto R M Martinez, Melina P Martins, Ana Lucila Moreira, Carlos R Martins, Paulo A T Kimaid, Marcondes C França
The cranial nerves IX and X emerge from medulla oblongata and have motor, sensory, and parasympathetic functions. Some of these are amenable to neurophysiological assessment. It is often hard to separate the individual contribution of each nerve; in fact, some of the techniques are indeed a composite functional measure of both nerves. The main methods are the evaluation of the swallowing function (combined IX and X), laryngeal electromyogram (predominant motor vagal function), and heart rate variability (predominant parasympathetic vagal function)...
January 2018: Journal of Clinical Neurophysiology: Official Publication of the American Electroencephalographic Society
https://www.readbyqxmd.com/read/29290921/gut-brain-crosstalk-regulates-craving-for-fatty-food
#8
REVIEW
Rajendra Raghow
Patients undergoing Roux-en-Y gastric bypass (RYGB) surgery elicit striking loss of body weight. Anatomical re-structuring of the gastrointestinal (GI) tract, leading to reduced caloric intake and changes in food preference, are thought to be the primary drivers of weight loss in bariatric surgery patients. However, the mechanisms by which RYGB surgery causes a reduced preference for fatty foods remain elusive. In a recent report, Hankir et al described how RYGB surgery modulated lipid nutrient signals in the intestine of rats to blunt their craving for fatty food...
December 15, 2017: World Journal of Diabetes
https://www.readbyqxmd.com/read/29288022/variable-expression-of-gfp-in-different-populations-of-peripheral-cholinergic-neurons-of-chatbac-egfp-transgenic-mice
#9
T Christopher Brown, Cherie E Bond, Donald B Hoover
Immunohistochemistry is used widely to identify cholinergic neurons, but this approach has some limitations. To address these problems, investigators developed transgenic mice that express enhanced green fluorescent protein (GFP) directed by the promoter for choline acetyltransferase (ChAT), the acetylcholine synthetic enzyme. Although, it was reported that these mice express GFP in all cholinergic neurons and non-neuronal cholinergic cells, we could not detect GFP in cardiac cholinergic nerves in preliminary experiments...
December 20, 2017: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/29276221/effects-of-postprandial-body-position-on-gastrointestinal-motility-the-autonomic-nervous-system-and-subjective-comfort
#10
Ayaka Okano, Shun Masuhara, Sonoka Ota, Chie Motegi, Noriko Takabayashi, Tetsuya Ogino
We examined postprandial body positions' effects on gastrointestinal motility, the autonomic nervous system and subjective comfort, i.e., whether lowering the head after a meal is beneficial for gastrointestinal motility and the prevention of pressure ulcer. We examined 10 healthy subjects and compared 3 body positions: (1) Seated upright. (2) Lying on a bed with the head at 60° and knees up by 20° (60° position). (3) Identical to (2) until post-meal; the head was then lowered to 30° (60°-30° position)...
December 2017: Acta Medica Okayama
https://www.readbyqxmd.com/read/29275193/transcutaneous-vagus-nerve-stimulation-tvns-enhances-recognition-of-emotions-in-faces-but-not-bodies
#11
Roberta Sellaro, Beatrice de Gelder, Alessandra Finisguerra, Lorenza S Colzato
The polyvagal theory suggests that the vagus nerve is the key phylogenetic substrate enabling optimal social interactions, a crucial aspect of which is emotion recognition. A previous study showed that the vagus nerve plays a causal role in mediating people's ability to recognize emotions based on images of the eye region. The aim of this study is to verify whether the previously reported causal link between vagal activity and emotion recognition can be generalized to situations in which emotions must be inferred from images of whole faces and bodies...
November 23, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29242088/voluntarily-induced-vomiting-a-yoga-technique-to-enhance-pulmonary-functions-in-healthy-humans
#12
Ragavendrasamy Balakrishnan, Ramesh Mavathur Nanjundaiah, Nandi Krishnamurthy Manjunath
Vomiting is a complex autonomic reflex orchestrated by several neurological centres in the brain. Vagus, the cranial nerve plays a key role in regulation of vomiting. Kunjal Kriya (Voluntarily Induced Vomiting), is a yogic cleansing technique which involves voluntarily inducing vomiting after drinking saline water (5%) on empty stomach. This study was designed with an objective to understand the effect of voluntary induced vomiting (ViV) on pulmonary functions in experienced practitioners and novices and derive its possible therapeutic applications...
December 11, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/29240833/vagal-nerve-stimulation-triggers-widespread-responses-and-alters-large-scale-functional-connectivity-in-the-rat-brain
#13
Jiayue Cao, Kun-Han Lu, Terry L Powley, Zhongming Liu
Vagus nerve stimulation (VNS) is a therapy for epilepsy and depression. However, its efficacy varies and its mechanism remains unclear. Prior studies have used functional magnetic resonance imaging (fMRI) to map brain activations with VNS in human brains, but have reported inconsistent findings. The source of inconsistency is likely attributable to the complex temporal characteristics of VNS-evoked fMRI responses that cannot be fully explained by simplified response models in the conventional model-based analysis for activation mapping...
2017: PloS One
https://www.readbyqxmd.com/read/29239338/effects-of-neuregulin-1-on-autonomic-nervous-system-remodeling-post-myocardial-infarction-in-a-rat-model
#14
Xin Lai, Liang Zhong, Hai-Xia Fu, Song Dang, Xin Wang, Ning Zhang, Gao-Ke Feng, Zi-Qiang Liu, Xi Wang, Long Wang
Sympathetic nerve and vagus nerve remodeling play an important part in cardiac function post-myocardial infarction (MI). Increasing evidence indicates that neuregulin-1 (NRG-1) improves cardiac function following heart failure. Since its impact on cardiac function and neural remodeling post-MI is poorly understood, we aimed to investigate the role of NRG-1 in autonomic nervous system remodeling post-MI. Forty-five Sprague-Dawley rats were equally randomized into three groups: sham (with the left anterior descending coronary artery exposed but without ligation), MI (left anterior descending coronary artery ligation), and MI plus NRG-1 (left anterior descending coronary artery ligation followed by intraperitoneal injection of NRG-1 (10 μg/kg, once daily for 7 days))...
November 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29237522/-an-analysis-of-cardiac-autonomic-nerve-function-in-girls-with-idiopathic-central-precocious-puberty
#15
Lan-Fen Yi, Hong-Xia Wen, Mei Qiu, Xiao-Xiao Cao
OBJECTIVE: To investigate the cardiac autonomic nerve function in girls with idiopathic central precocious puberty (ICPP). METHODS: A total of 66 girls with ICPP were enrolled, among whom 36 were obese and 30 were not obese. A total of 68 age-matched healthy girls (normal controls) and 51 girls with simple obesity were enrolled as controls. All the subjects underwent 24-hour ambulatory electrocardiography, and deceleration capacity of heart rate (DC), acceleration capacity of heart rate (AC), and heart rate variability (HRV), and body mass index (BMI) were compared between groups...
December 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/29233861/restoration-of-metabolic-inflammation-related-ghrelin-resistance-by-weight-loss
#16
Farhana Naznin, Koji Toshinai, Tm Zaved Waise, Tadashi Okada, Hideyuki Sakoda, Masamitsu Nakazato
High-fat diet (HFD)-induced metabolic inflammation in the central and peripheral organs contributes to the pathogenesis of obesity. Long-term HFD blunts signaling by ghrelin, a gastric-derived orexigenic peptide, in the vagal afferent nerve via a mechanism involving in situ activation of inflammation. This study was undertaken to investigate whether ghrelin resistance is associated with progressive development of metabolic inflammation. In mice, ghrelin's orexigenic activity was abolished 2 to 4 weeks after the commencement of HFD (60% of energy from fat), consistent with the timing of accumulation and activation of macrophages and microglia in the nodose ganglion and hypothalamus...
December 12, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29224103/sex-differences-and-role-of-estradiol-in-hypoglycemia-associated-counter-regulation
#17
Karen P Briski, Hussain N Alhamami, Ayed Alshamrani, Santosh K Mandal, Manita Shakya, Mostafa H H Ibrahim
Vital nerve cell functions, including maintenance of transmembrane voltage and information transfer, occur at high energy expense. Inadequate provision of the obligate metabolic fuel glucose exposes neurons to risk of dysfunction or injury. Clinical hypoglycemia rarely occurs in nondiabetic individuals but is an unfortunate regular occurrence in patients with type 1 or advanced insulin-treated type 2 diabetes mellitus. Requisite strict glycemic control, involving treatment with insulin, sulfonylureas, or glinides, can cause frequent episodes of iatrogenic hypoglycemia due to defective counter-regulation, including reduced glycemic thresholds and diminished magnitude of motor responses...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29220864/the-nature-of-catecholamine-containing-neurons-in-the-enteric-nervous-system-in-relationship-with-organogenesis-normal-human-anatomy-and-neurodegeneration
#18
G Natale, L Ryskalin, C L Busceti, F Biagioni, F Fornai
The gastrointestinal tract is provided with extrinsic and intrinsic innervation. The extrinsic innervation includes the classic vagal parasympathetic and sympathetic components, with afferent sensitive and efferent secretomotor fibers. The intrinsic innervations is represented by the enteric nervous system (ENS), which is recognized as a complex neural network controlling a variety of cell populations, including smooth muscle cells, mucosal secretory cells, endocrine cells, microvasculature, immune and inflammatory cells...
September 1, 2017: Archives Italiennes de Biologie
https://www.readbyqxmd.com/read/29219123/chronic-cuffing-of-cervical-vagus-nerve-inhibits-efferent-fiber-integrity-in-rat-model
#19
Jesse Paul Somann, Gabriel Albors, Kaitlyn Neihouser, Kun-Han Lu, Zhongming Liu, Matthew Peter Ward, Abigail Durkes, J Paul Robinson, Terry Powley, Pedro Irazoqui
Numerous studies of vagal nerve stimulation (VNS) have been published showing it to be a potential treatment for chronic inflammation and other related diseases and disorders. Studies in recent years have shown that electrical stimulation of the vagal efferent fibers can artificially modulate cytokine levels and reduce systematic inflammation. Most VNS research in the treatment of inflammation have been acute studies on rodent subjects. Our study tested VNS on freely moving animals by stimulating and recording from the cervical vagus with nerve cuff electrodes over an extended period of time...
December 8, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29215540/the-insulin-receptor-is-colocalized-with-the-trpv1-nociceptive-ion-channel-and-neuropeptides-in-pancreatic-spinal-and-vagal-primary-sensory-neurons
#20
Bence András Lázár, Gábor Jancsó, Orsolya Oszlács, István Nagy, Péter Sántha
OBJECTIVES: Recent observations demonstrated the expression of the insulin receptor (InsR) and its functional interaction with the transient receptor potential vanilloid type 1 receptor (TRPV1) in sensory ganglion neurons. Because sensory nerves are implicated in pancreatic inflammatory processes, we studied the colocalization of the InsR with TRPV1 and proinflammatory neuropeptides in spinal and vagal pancreatic afferent neurons. METHODS: Immunohistochemistry and quantitative morphometry were used to analyze the expression of TRPV1, InsR, substance P (SP), and calcitonin gene-related peptide (CGRP) in retrogradely labeled pancreatic dorsal root ganglion (DRG) and nodose ganglion (NG) neurons...
January 2018: Pancreas
keyword
keyword
9747
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"