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https://www.readbyqxmd.com/read/29454137/mechanisms-and-management-of-refractory-ventricular-arrhythmias-in-the-age-of-autonomic-modulation
#1
Jason S Bradfield, Olujimi A Ajijola, Marmar Vaseghi, Kalyanam Shivkumar
Ventricular arrhythmias are responsible for hundreds of thousands of deaths every year. Catheter ablation of ventricular tachycardia (VT) is an essential component of the management of these life-threatening arrhythmias. However, in many patients, despite medical and interventional therapy, VT recurs. Further, some VT substrates (mid-myocardial, left ventricular summit, intra-septal) are not easily targeted, due to limitations of currently available technology. In certain clinical settings, ventricular fibrillation (VF) episodes that have premature ventricular contraction (PVC) triggers can also be targeted with catheter ablation...
February 14, 2018: Heart Rhythm: the Official Journal of the Heart Rhythm Society
https://www.readbyqxmd.com/read/29450441/failures-of-sacral-neuromodulation-for-incontinence
#2
Bilal Chughtai, Dominique Thomas, Tianyi Sun, Art Sedrakyan
No abstract text is available yet for this article.
February 14, 2018: JAMA Surgery
https://www.readbyqxmd.com/read/29449713/control-of-synaptic-plasticity-in-deep-cortical-networks
#3
REVIEW
Pieter R Roelfsema, Anthony Holtmaat
Humans and many other animals have an enormous capacity to learn about sensory stimuli and to master new skills. However, many of the mechanisms that enable us to learn remain to be understood. One of the greatest challenges of systems neuroscience is to explain how synaptic connections change to support maximally adaptive behaviour. Here, we provide an overview of factors that determine the change in the strength of synapses, with a focus on synaptic plasticity in sensory cortices. We review the influence of neuromodulators and feedback connections in synaptic plasticity and suggest a specific framework in which these factors can interact to improve the functioning of the entire network...
February 16, 2018: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/29442423/impact-of-type-1-diabetes-mellitus-and-sitagliptin-treatment-on-the-neuropeptide-y-system-of-rat-retina
#4
Elisa J Campos, João Martins, Dan Brudzewsky, Sandra Correia, Ana R Santiago, David Pd Woldbye, António F Ambrósio
BACKGROUND: Neuropeptide Y (NPY) is a neuromodulator that is expressed in the retina. Increasing evidence suggests that NPY has pronounced anti-inflammatory effects, which might depend on the inhibition of dipeptidyl-peptidase-IV (DPP-IV). The aim of this study was to investigate the impact of type 1 diabetes mellitus (DM) and sitagliptin, a DPP-IV inhibitor, on the NPY system in the retina using an animal model. METHODS: Type 1 DM was induced in male Wistar rats by an intraperitoneal injection of streptozotocin (STZ)...
February 14, 2018: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29441289/high-density-in-spinal-cord-stimulation-virtual-expert-registry-discover-study-protocol-for-a-prospective-observational-trial
#5
Mats De Jaeger, Robbert-Jan van Hooff, Lisa Goudman, Alexis Valenzuela Espinoza, Raf Brouns, Martine Puylaert, Wim Duyvendak, Maarten Moens
Background: Spinal cord stimulation (SCS) is a proven and effective treatment for neuropathic pain conditions such as failed back surgery syndrome (FBSS). The hypothesis that different settings for SCS parameters activate unique, pain-relieving mechanisms has boosted the development of various SCS paradigms. High density spinal cord stimulation (HD-SCS) is one of those promising, novel stimulation forms characterized by subthreshold stimulation, delivering more pulses per second and a higher pulse density to the spinal cord than conventional SCS...
June 2017: Anesthesiology and Pain Medicine
https://www.readbyqxmd.com/read/29440997/layer-and-cell-type-specific-modulation-of-excitatory-neuronal-activity-in-the-neocortex
#6
REVIEW
Gabriele Radnikow, Dirk Feldmeyer
From an anatomical point of view the neocortex is subdivided into up to six layers depending on the cortical area. This subdivision has been described already by Meynert and Brodmann in the late 19/early 20. century and is mainly based on cytoarchitectonic features such as the size and location of the pyramidal cell bodies. Hence, cortical lamination is originally an anatomical concept based on the distribution of excitatory neuron. However, it has become apparent in recent years that apart from the layer-specific differences in morphological features, many functional properties of neurons are also dependent on cortical layer or cell type...
2018: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/29440996/is-there-a-canonical-cortical-circuit-for-the-cholinergic-system-anatomical-differences-across-common-model-systems
#7
REVIEW
Jennifer J Coppola, Anita A Disney
Acetylcholine (ACh) is believed to act as a neuromodulator in cortical circuits that support cognition, specifically in processes including learning, memory consolidation, vigilance, arousal and attention. The cholinergic modulation of cortical processes is studied in many model systems including rodents, cats and primates. Further, these studies are performed in cortical areas ranging from the primary visual cortex to the prefrontal cortex and using diverse methodologies. The results of these studies have been combined into singular models of function-a practice based on an implicit assumption that the various model systems are equivalent and interchangeable...
2018: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/29440990/internal-state-dependent-odor-processing-and-perception-the-role-of-neuromodulation-in-the-fly-olfactory-system
#8
REVIEW
Sercan Sayin, Ariane C Boehm, Johanna M Kobler, Jean-François De Backer, Ilona C Grunwald Kadow
Animals rely heavily on their sense of olfaction to perform various vital interactions with an ever-in-flux environment. The turbulent and combinatorial nature of air-borne odorant cues demands the employment of various coding strategies, which allow the animal to attune to its internal needs and past or present experiences. Furthermore, these internal needs can be dependent on internal states such as hunger, reproductive state and sickness. Neuromodulation is a key component providing flexibility under such conditions...
2018: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29439744/an-investigation-into-closed-loop-treatment-of-neurological-disorders-based-on-sensing-mitochondrial-dysfunction
#9
REVIEW
Scott D Adams, Abbas Z Kouzani, Susannah J Tye, Kevin E Bennet, Michael Berk
Dynamic feedback based closed-loop medical devices offer a number of advantages for treatment of heterogeneous neurological conditions. Closed-loop devices integrate a level of neurobiological feedback, which allows for real-time adjustments to be made with the overarching aim of improving treatment efficacy and minimizing risks for adverse events. One target which has not been extensively explored as a potential feedback component in closed-loop therapies is mitochondrial function. Several neurodegenerative and psychiatric disorders including Parkinson's disease, Major Depressive disorder and Bipolar disorder have been linked to perturbations in the mitochondrial respiratory chain...
February 13, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29437952/septal-cholinergic-neurons-gate-hippocampal-output-to-entorhinal-cortex-via-oriens-lacunosum-moleculare-interneurons
#10
Juhee Haam, Jingheng Zhou, Guohong Cui, Jerrel L Yakel
Neuromodulation of neural networks, whereby a selected circuit is regulated by a particular modulator, plays a critical role in learning and memory. Among neuromodulators, acetylcholine (ACh) plays a critical role in hippocampus-dependent memory and has been shown to modulate neuronal circuits in the hippocampus. However, it has remained unknown how ACh modulates hippocampal output. Here, using in vitro and in vivo approaches, we show that ACh, by activating oriens lacunosum moleculare (OLM) interneurons and therefore augmenting the negative-feedback regulation to the CA1 pyramidal neurons, suppresses the circuit from the hippocampal area CA1 to the deep-layer entorhinal cortex (EC)...
February 7, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29437027/benefits-of-olive-oil-phenolic-compounds-in-disease-prevention
#11
Olga Garcia-Martinez, Concepcion Ruiz, Alvaro Gutierrez-Ibanez, Rebeca Illescas-Montes, Lucia Melguizo-Rodriguez
BACKGROUND AND OBJECTIVE: The preventive effects of olive oil against different diseases have been attributed to its high phenolic compound content. The objective of this study was to examine available scientific evidence on the beneficial effects against chronic diseases of olive oil phenolic compounds. METHOD: This article examines recently published data on olive oil phenolic compounds and their potential benefits in the prevention of cardiovascular disease, cancer, neurodegenerative disease, and osteoporosis...
February 12, 2018: Endocrine, Metabolic & Immune Disorders Drug Targets
https://www.readbyqxmd.com/read/29436519/low-intensity-focused-ultrasound-alters-the-latency-and-spatial-patterns-of-sensory-evoked-cortical-responses-in-vivo
#12
Jonathan A N Fisher, Iryna Gumenchuk
The use of transcranial, low intensity focused ultrasound (FUS) is an emerging neuromodulation technology that shows promise for both therapeutic and research applications. Among many, one of the most exciting applications is the use of FUS to rehabilitate or augment human sensory capabilities. While there is compelling empirical evidence demonstrating this capability, basic questions regarding the spatiotemporal extent of the modulatory effects remain. Our objective was to assess the basic, yet often overlooked hypothesis that FUS in fact alters sensory-evoked neural activity within the region of the cerebral cortex at the beam's focus...
February 13, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29435768/a-multifaceted-mass-spectrometric-method-to-probe-feeding-related-neuropeptide-changes-in-callinectes-sapidus-and-carcinus-maenas
#13
Yuzhuo Zhang, Kellen DeLaney, Limei Hui, Junhua Wang, Robert M Sturm, Lingjun Li
Food intake is regulated by various neuromodulators, including numerous neuropeptides. However, it remains elusive at the molecular and cellular level as to how these important chemicals regulate internal processes and which regions of the neuronal organs are responsible for regulating the behavior. Here we report a comparative neuropeptidomic analysis of the brain and pericardial organ (PO) in response to feeding in two well-studied crustacean physiology model organisms, Callinectes sapidus and Carcinus maenas, using mass spectrometry (MS) techniques...
February 12, 2018: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/29432784/cognitive-and-neuromodulation-strategies-for-unhealthy-eating-and-obesity-systematic-review-and-discussion-of-neurocognitive-mechanisms
#14
REVIEW
Laura Forcano, Fernanda Mata, Rafael de la Torre, Antonio Verdejo-Garcia
We systematically reviewed research on cognitive training and neuromodulation interventions for reducing food craving/intake, unhealthy diet and weight, and discussed their mechanisms of action. We reviewed 50 studies involving six cognitive trainings: Approach and Attentional Bias Modification, Implementation Intentions, Response Inhibition, Episodic Future Thinking and Working Memory; and four neuromodulation approaches: Transcranial Magnetic Stimulation (TMS), transcranial Direct Current Stimulation (tDCS), Deep Brain Stimulation (DBS) and Neurofeedback...
February 9, 2018: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/29432505/the-use-of-eeg-biofeedback-neurofeedback-in-psychiatric-rehabilitation
#15
REVIEW
Renata Markiewcz
The aim of the systematic review was to evaluate the use of EEG Biofeedback/Neurofeedback in patients treated for mental disorders. The review covered publications analyzing influences and effects of therapy in patients receiving psychiatric treatment based on EEG Biofeedback/Neurofeedback. Selection of publications was made by searching PubMed and Scopus databases. 328 records concerning applications of the presented method were identified in total, including 84 records for patients diagnosed with mental disorders...
December 30, 2017: Psychiatria Polska
https://www.readbyqxmd.com/read/29431275/burst-spinal-cord-stimulation-review-of-preclinical-studies-and-comments-on-clinical-outcomes
#16
REVIEW
Krishnan Chakravarthy, Alexander R Kent, Adil Raza, Fang Xing, Thomas M Kinfe
BACKGROUND: Burst spinal cord stimulation (SCS) technology uses a novel waveform that consists of closely packed high-frequency electrical impulses followed by a quiescent period. Within the growing field of neuromodulation, burst stimulation is unique in that it mimics the natural burst firing of the nervous system, in particular the thalamo-cingulate rhythmicity, resulting in modulation of the affective and attentional components of pain processing (e.g., medial thalamic pathways). STUDY DESIGN: A review of preclinical and clinical studies regarding burst SCS for various chronic pain states...
February 12, 2018: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/29428908/molecular-cloning-and-expression-analysis-of-the-tyramine-br-receptor-genes-in-apis-cerana-cerana
#17
Li-Zhen Zhang, Yong Zhang, Jing-Hua Hu, Zi-Long Wang, Zhi-Jiang Zeng
Tyramine is a biological polyamine, which serves important functions as neurotransmitters, neuromodulators and neurohormone of the central nervous system. It participates in the regulation of various behavior and physiological processes in insects. For example, tyramine and its receptor genes are involved in the regulation of learning and memory in the animals. In this study, the full-length cDNA sequences of the tyramine receptor genes (Actyr1 and Actyr2) of the Chinese honeybee, Apis cerana cerana, were cloned and sequenced for the first time...
February 20, 2018: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/29427206/neuromodulation-in-inflammatory-skin-disease
#18
Eric J Yang, Sahil Sekhon, Kristen M Beck, Tina Bhutani, John Koo
Inflammatory skin diseases are difficult to treat because of a lack of available treatment options for severe disease. However, recent advances have shown that vagus nerve stimulation can be used to decrease inflammation and reduce disease severity in rheumatoid arthritis and inflammatory bowel disease. Changes in cytokine profiles observed in these studies are similar to those seen with use of biologics in inflammatory skin disease, suggesting that they act along similar pathways to disrupt chronic inflammation and treat inflammatory disease...
February 9, 2018: Dermatology and Therapy
https://www.readbyqxmd.com/read/29425970/the-therapeutic-potential-of-cystathionine-gamma-lyase-in-temporomandibular-inflammation-induced-orofacial-hypernociception
#19
Bruna M Santos, Emanuela G Garattini, Luiz G S Branco, Christie R A Leite-Panissi, Glauce C Nascimento
Hydrogen sulfide (H2S) is an endogenous neuromodulator produced mainly by the enzyme cystathionine gamma-lyase (CSE) in peripheral tissues. A pronociceptive role of endogenously produced H2S has been previously reported by our group in a model of orofacial inflammatory pain. Using the established persistent orofacial pain rat model induced by complete Freund's adjuvant (CFA) injection into temporomandibular joint (TMJ), we have now investigated the putative role of endogenous H2S modulating hypernociceptive responses...
February 6, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29425906/effects-of-vagal-neuromodulation-on-feeding-behavior
#20
Nicole A Pelot, Warren M Grill
Implanted vagus nerve stimulation (VNS) for obesity was recently approved by the FDA. However, its efficacy and mechanisms of action remain unclear. Herein, we synthesize clinical and preclinical effects of VNS on feeding behavior and energy balance and discuss engineering considerations for understanding and improving the therapy. Clinical cervical VNS (≤30 Hz) to treat epilepsy or depression has produced mixed effects on weight loss as a side effect, albeit in uncontrolled, retrospective studies. Conversely, preclinical studies (cervical and subdiaphragmatic VNS) mostly report decreased food intake and either decreased weight gain or weight loss...
February 6, 2018: Brain Research
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