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Vagal nerve

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https://www.readbyqxmd.com/read/28213131/nerp-2-regulates-gastric-acid-secretion-and-gastric-emptying-via-the-orexin-pathway
#1
Cherl Namkoong, Koji Toshinai, T M Zaved Waise, Hideyuki Sakoda, Kazuki Sasaki, Yoichi Ueta, Min-Seon Kim, Naoto Minamino, Masamitsu Nakazato
Neuroendocrine regulatory peptide (NERP)-2 is derived from a distinct region of VGF, a neurosecretory protein originally identified as a product of a nerve growth factor-responsive gene in rat PC12 cells. Colocalization of NERP-2 with orexin-A in the lateral hypothalamus increases orexin-A-induced feeding and energy expenditure in both rats and mice. Orexigenic and anorectic peptides in the hypothalamus modulate gastric function. In this study, we investigated the effect of NERP-2 on gastric function in rats...
February 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28212075/towards-photoplethysmography-based-estimation-of-instantaneous-heart-rate-during-physical-activity
#2
Delaram Jarchi, Alex Casson
OBJECTIVE: Recently numerous methods have been proposed for estimating average heart rate using photoplethysmography (PPG) during physical activity, overcoming the significant interference that motion causes in PPG traces. We propose a new algorithm framework for extracting instantaneous heart rate from wearable PPG and ECG signals to provide an estimate of heart rate variability during exercise. METHODS: For ECG signals we propose a new spectral masking approach which modifies a particle filter tracking algorithm, and for PPG signals constrains the instantaneous frequency obtained from the Hilbert transform to a region of interest around a candidate heart rate measure...
February 13, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28197102/right-cervical-vagotomy-aggravates-viral-myocarditis-in-mice-via-the-cholinergic-anti-inflammatory-pathway
#3
Ge Li-Sha, Chen Xing-Xing, Wu Lian-Pin, Zhou De-Pu, Li Xiao-Wei, Lin Jia-Feng, Li Yue-Chun
The autonomic nervous system dysfunction with increased sympathetic activity and withdrawal of vagal activity may play an important role in the pathogenesis of viral myocarditis. The vagus nerve can modulate the immune response and control inflammation through a 'cholinergic anti-inflammatory pathway' dependent on the α7-nicotinic acetylcholine receptor (α7nAChR). Although the role of β-adrenergic stimulation on viral myocarditis has been investigated in our pervious studies, the direct effect of vagal tone in this setting has not been yet studied...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28185968/the-value-of-diagnostic-bilateral-intracranial-eeg-in-treatment-resistant-focal-epilepsy
#4
Travis C Hill, Benjamin A Rubin, Vineet Tyagi, Jason Theobald, Alyson Silverberg, Mary Miceli, Patricia Dugan, Chad Carlson, Werner K Doyle
OBJECTIVES: We assessed the efficacy and risks of diagnostic bilateral intracranial EEG (bICEEG) in treatment-resistant epilepsy (TRE) patients with poorly lateralized epileptogenic zone (EZ) on non-invasive studies as reflected by progress to resection, Engel outcome and complication rate. METHODS: This is a retrospective chart review of 199 patients with TRE who had diagnostic bICEEG at New York University Medical Center between 1994 and 2013. Study endpoints were progress to resection, surgical outcome and perioperative complications...
February 6, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28185669/electrical-stimulation-and-monitoring-devices-of-the-cns-an-imaging-review
#5
REVIEW
Sohil H Patel, Casey H Halpern, Timothy M Shepherd, Vincent M Timpone
Functional neurosurgery is a rapidly growing field with exciting future potential applications. This article describes currently used implanted electronic devices for neurologic stimulation and monitoring. The devices to be reviewed include invasive EEG electrodes, deep brain stimulator, motor cortex stimulator, responsive neurostimulation, osteo-integrated hearing aid, middle ear implant, cochlear implant, auditory brainstem implant, vagal nerve stimulator and spinal cord stimulator. Emphasis is placed on the normal components, function, positioning, potential complications and MRI safety of these devices...
February 6, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28178561/the-hunger-games-salmonella-anorexia-and-nlrp3
#6
Luke A J O'Neill
Rao and colleagues (2017) reveal how Salmonella limits anorexia in mice, protecting them and promoting the spread of infection. The mechanism involves inhibition of the NLRP3 inflammasome limiting vagal nerve stimulation by IL-1β, which in turn promotes appetite. A possible new therapeutic approach for treating anorexia in multiple diseases is proposed.
February 7, 2017: Cell Metabolism
https://www.readbyqxmd.com/read/28177663/hypothermia-induced-by-inhibition-of-fatty-acid-metabolism-in-anesthetized-rats-contributions-of-the-forebrain-and-vagal-afferents
#7
T Osaka
2-Mercaptoacetate (MA) is an antimetabolic drug that inhibits the utilization of fatty acids as an energy source. The intravenous injection of MA (1.2 mmol kg-1) elicited an increase in tail skin temperature and a decrease in body core temperature in urethane-chloralose-anesthetized, neuromuscularly blocked, artificially ventilated rats, though administration of the same amount of NaCl did not. The respiratory exchange ratio was significantly higher after administration of MA than that after the saline treatment...
January 29, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28166752/a-rare-case-of-bilateral-cervical-vagal-neurofibromas-role-of-high-resolution-ultrasound
#8
Bin Liu, Yuanding Zhang, Lili Zhang, Fan Zhang, Hongyu Li, Shuang Li, Yafang Liu, Jie Du, Lirong Zhao
BACKGROUND: Neurofibromas originating from vagus nerves are rarely reported in the literature. In particular, plexiform neurofibromas of the bilateral cervical vagus nerve are extremely rare. CASE PRESENTATION: A 21-year-old female presented with a 2-year history of swelling on the right side of her neck. Physical examination revealed a soft-tissue mass on the right side of her neck. Ultrasonography (US) and magnetic resonance (MR) imaging showed a tumor centered in the right carotid sheath between the internal jugular vein and the common carotid artery...
February 6, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28160574/subdiaphragmatic-vagotomy-promotes-tumor-growth-and-reduces-survival-via-tnf%C3%AE-in-a-murine-pancreatic-cancer-model
#9
Lars Ivo Partecke, André Käding, Dung Nguyen Trung, Stephan Diedrich, Matthias Sendler, Frank Weiss, Jens-Peter Kühn, Julia Mayerle, Katharina Beyer, Wolfram von Bernstorff, Claus-Dieter Heidecke, Wolfram Keßler
This study analyses the effects of vagotomy on tumor growth and survival in a murine, pancreatic cancer model in wild-type and TNFα-knockout (-/-) mice.Throughout many operative procedures in the upper gastrointestinal tract the partial or complete transection of the vagus nerve or its local nerve fibers is unavoidable. Thereby its anti-inflammatory effects in residual tumor tissue may get lost. This effect may be mediated by tumor-associated macrophages (TAM) secreting TNFα.In an orthotopic murine pancreatic cancer model subdiaphragmatic vagotomy versus sham surgery was performed...
February 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28155119/a-combination-of-probiotics-and-magnesium-orotate-attenuate-depression-in-a-small-ssri-resistant-cohort-an-intestinal-anti-inflammatory-response-is-suggested
#10
Matthew Bambling, Sophie C Edwards, Sean Hall, Luis Vitetta
Approximately, one-third of those who develop major depression will have a poor response to treatment and over time can become treatment resistant. Intestinal dysbiosis has been implicated in depression with systemic inflammation and vagal and enteric nerve impairment. We report on a sequel pilot study (n = 12) with a combination probiotics/magnesium orotate formulation adjuvant administered with SSRIs for treatment resistant depression. At the end of an 8-week intervention mean changes for depression scores and quality of life in the group was clinically significantly improved (p < 0...
February 2, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28152451/can-natural-ways-to-stimulate-the-vagus-nerve-improve-seizure-control
#11
REVIEW
Alan W C Yuen, Josemir W Sander
The vagus nerve (VN) is the longest cranial nerve, innervating the neck, thorax and abdomen, with afferent fibers transmitting a range of interoceptive stimuli and efferent fibres to somatic structures and autonomic preganglions. Over the last few decades, electrical stimulation of the VN using implanted devices (VNS) has been developed leading to its approval for the treatment of epilepsy and depression. More recently, non-invasive devices to stimulation the VN have been developed. The VN has many functions and the activity that is most amenable to assessment is its effect in controlling the cardiac rhythm...
January 30, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28148494/upregulation-of-fatty-acid-amide-hydrolase-faah-in-the-dorsal-periaqueductal-gray-is-associated-with-neuropathic-pain-and-reduced-heart-rate-in-rats
#12
Caron Dean, Cecilia J Hillard, Jeanne L Seagard, Francis A Hopp, Quinn H Hogan
Nerve damage can induce a heightened pain response to noxious stimulation, which is termed hyperalgesia. Pain itself acts as a stressor, initiating autonomic and sensory effects through the dorsal periaqueductal gray (dPAG) to induce both sympathoexcitation and analgesia, which prior studies have shown to be affected by endocannabinoid signaling. The present study addressed the hypothesis that neuropathic pain disrupts autonomic and analgesic regulation by endocannabinoid signaling in the dPAG. Endocannabinoid contents, transcript levels of endocannabinoid signaling components, and catabolic enzyme activity were analyzed in the dPAG of rats at 21 days after painful nerve injury...
February 1, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28144954/monitoring-of-the-posterior-cricoarytenoid-muscle-represents-another-option-for-neural-monitoring-during-thyroid-surgery-normative-vagal-and-recurrent-laryngeal-nerve-posterior-cricoarytenoid-muscle-electromyographic-data
#13
Whitney Liddy, Samuel R Barber, Brian M Lin, Dipti Kamani, Natalia Kyriazidis, Bradley Lawson, Gregory W Randolph
OBJECTIVE: Intraoperative neural monitoring (IONM) of laryngeal nerves using electromyography (EMG) is routinely performed using endotracheal tube surface electrodes adjacent to the vocalis muscles. Other laryngeal muscles such as the posterior cricoarytenoid muscle (PCA) are indirectly monitored. The PCA may be directly and reliably monitored through an electrode placed in the postcricoid region. Herein, we describe the method and normative data for IONM using PCA EMG. STUDY DESIGN: Retrospective review...
January 31, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28142325/continuous-intraoperative-neuromonitoring-study-using-pigs-for-the-prevention-of-mechanical-recurrent-laryngeal-nerve-injury-in-esophageal-surgery
#14
Tomoaki Deguchi, Yoshifumi Ikeda, Masanori Niimi, Ryoji Fukushima, Masaki Kitajima
PURPOSES: During esophageal surgery, clamping injury and injury associated with the use of energy devices are common mechanisms underlying intraoperative recurrent laryngeal nerve (RLN) damage. Recently, intraoperative neuromonitoring (IONM) has been applied to prevent RLN injury. This study was aimed at investigating the changes in the EMG signals associated with clamping injury of the RLN caused by picking up of the nerve with tweezers in domestic pigs. METHODS: Six domestic pigs (12 RLNs) underwent continuous IONM (CIONM) by our original automated periodic vagal nerve stimulation method...
January 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28128461/cluster-headache-and-other-tacs-pathophysiology-and-neurostimulation-options
#15
Miguel Ja Láinez, Edelmira Guillamón
BACKGROUND: The trigeminal autonomic cephalalgias (TACs) are highly disabling primary headache disorders. There are several issues that remain unresolved in the understanding of the pathophysiology of the TACs, although activation of the trigeminal-autonomic reflex and ipsilateral hypothalamic activation both play a central role. The discovery of the central role of the hypothalamus led to its use as a therapeutic target. After the good results obtained with hypothalamic stimulation, other peripheral neuromodulation targets were tried in the management of refractory cluster headache (CH) and other TACs...
February 2017: Headache
https://www.readbyqxmd.com/read/28128051/functional-imaging-in-the-evaluation-of-diabetic-gastroparesis
#16
Prasanna Santhanam, Wael Marashdeh, Lilja B Solnes
Introduction Gastroparesis (a complication of both type 1 and type 2 diabetes mellitus) is delayed gastric emptying in the absence of a mechanical obstruction. Overall prevalence of Gastroparesis is close to 5 % in type 1 diabetes and 1 % in type 2 diabetes. It is unclear if good glycemic control leads to delay of development and progression of gastroparesis. Methods Gastric enteric neurons as well as interstitial cells of Cajal (ICC) are depleted, truncated and are surrounded by immune infiltrates composed of macrophages...
January 26, 2017: Current Diabetes Reviews
https://www.readbyqxmd.com/read/28120052/vagal-nerve-stimulation-for-drug-resistant-epilepsy-adverse-events-and-outcome-in-a-series-of-patients-with-long-term-follow-up
#17
R Morace, G Di Gennaro, P P Quarato, A D'Aniello, A Mascia, L Grammaldo, M De Risi, A Sparano, F Di Cola, M De Angelis, V Esposito
BACKGROUND: Vagal nerve stimulation (VNS) is a palliative treatment option for drug-resistant epilepsy. The aim of this study was to describe the clinical and demographic features of selected patients scheduled for VNS and to evaluate the long-term efficacy of VNS in seizure control. MATERIALS AND METHODS: Between 2006 and 2013, 32 consecutive epileptic patients (14 male and 18 female) were enrolled at our Institute for VNS implantation. In all cases resective surgery had previously been excluded by the use of a noninvasive presurgical study protocol...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28120051/adverse-effects-and-surgical-complications-in-pediatric-patients-undergoing-vagal-nerve-stimulation-for-drug-resistant-epilepsy
#18
A Trezza, A Landi, D Grioni, D Pirillo, L Fiori, C Giussani, E P Sganzerla
Vagal nerve stimulation (VNS) is an effective treatment for drug-resistant epilepsy that is not suitable for resective surgery, both in adults and in children. Few reports describe the adverse effects and complications of VNS. The aim of our study was to present a series of 33 pediatric patients who underwent VNS for drug-resistant epilepsy and to discuss the adverse effects and complications through a review of the literature.The adverse effects of VNS are usually transient and are dependent on stimulation of the vagus and its efferent fibers; surgical complications of the procedure may be challenging and patients sometimes require further surgery; generally these complications affect VNS efficacy; in addition, hardware complications also have to be taken into account...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28116780/r1-autonomic-nervous-system-in-acute-kidney-injury
#19
REVIEW
Dagmara Hering, Pawel J Winklewski
Acute kidney injury (AKI) is a rapid loss of kidney function resulting in accumulation of end metabolic products and associated abnormalities in fluid, electrolyte and acid-base homeostasis. The pathophysiology of AKI is complex and multifactorial involving numerous vascular, tubular and inflammatory pathways. Neurohumoral activation with heightened activity of the sympathetic nervous system and renin-angiotensin-aldosterone system play a critical role in this scenario. Inflammation and/or local renal ischaemia are underlying mechanisms triggering renal tissue hypoxia and resultant renal microcirculation dysfunction; a common feature of AKI occurring in numerous clinical conditions leading to a high morbidity and mortality rate...
February 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/28113141/seizure-detection-and-neuromodulation-a-summary-of-data-presented-at-the-xiii-conference-on-new-antiepileptic-drug-and-devices-eilat-xiii
#20
REVIEW
Meir Bialer, Svein I Johannessen, René H Levy, Emilio Perucca, Torbjörn Tomson, H Steve White, Matthias J Koepp
The Thirteenth Eilat Conference on New Antiepileptic Drugs and Devices (EILAT XIII) took place in Madrid, Spain from June 26th to 29th 2016. For the first time, the last day of the conference focused solely on new medical devices and neuromodulation. The current article summarises the presentations of that day, focusing first on EEG- and ECG based methods and devices for seizure detection. These methodologies form the basis for novel cardiac-based methods of vagal nerve and responsive deep brain stimulation that rely on the prediction or early detection of seizures and that are also included in this article...
January 16, 2017: Epilepsy Research
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