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Gate control theory

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https://www.readbyqxmd.com/read/28100734/does-the-superior-colliculus-control-perceptual-sensitivity-or-choice-bias-during-attention-evidence-from-a-multialternative-decision-framework
#1
Devarajan Sridharan, Nicholas A Steinmetz, Tirin Moore, Eric I Knudsen
: Distinct networks in the forebrain and the midbrain coordinate to control spatial attention. The critical involvement of the superior colliculus (SC)-the central structure in the midbrain network-in visuospatial attention has been shown by four seminal, published studies in monkeys (Macaca mulatta) performing multialternative tasks. However, due to the lack of a mechanistic framework for interpreting behavioral data in such tasks, the nature of the SC's contribution to attention remains unclear...
January 18, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28094503/controlled-doping-in-graphene-monolayers-by-trapping-organic-molecules-at-graphene-substrate-interface
#2
Pawan Kumar Srivastava, Premlata Yadav, Varsha Rani, Subhasis Ghosh
We report controlled doping in graphene monolayers through charge transfer interaction by trapping selected organic molecules between graphene and underneath substrates. Controllability has been demonstrated in terms of shift in Raman spectra and Dirac point in graphene monolayers. The shift in the Dirac point to positive (negative) gate bias in the transfer characteristics of graphene monolayer based field effect transistor is a clear indication of p(n) type doping in graphene as a consequence of charge transfer interaction between organic molecules and graphene...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28057537/the-chloride-co-transporters-nkcc1-and-kcc2-in-experimental-autoimmune-encephalomyelitis-eae
#3
Muhammad Saad Yousuf, Kasia Zubkow, Gustavo Tenorio, Bradley Kerr
Patients with multiple sclerosis (MS) often complain of neuropathic pain. According to the Gate Control Theory of Pain, spinal networks of GABAergic inhibitory interneurons are important in modulating nociceptive inputs from the periphery. Na+-K+-2Cl- co-transporter 1 (NKCC1) and K+-Cl- co-transporter 2 (KCC2) generally dictate the tone of GABA/glycine inhibition by regulating intracellular chloride concentrations. In this study, we investigated the role of NKCC1 and KCC2 in neuropathic pain observed in the animal model, experimental autoimmune encephalomyelitis (EAE), a commonly used model to study the pathophysiology of MS...
January 3, 2017: Neuroscience
https://www.readbyqxmd.com/read/28028236/in-operando-evidence-of-deoxygenation-in-ionic-liquid-gating-of-yba2cu3o7-x
#4
Ana M Perez-Muñoz, Pedro Schio, Roberta Poloni, Alejandro Fernandez-Martinez, Alberto Rivera-Calzada, Julio C Cezar, Eduardo Salas-Colera, German R Castro, Joseph Kinney, Carlos Leon, Jacobo Santamaria, Javier Garcia-Barriocanal, Allen M Goldman
Field-effect experiments on cuprates using ionic liquids have enabled the exploration of their rich phase diagrams [Leng X, et al. (2011) Phys Rev Lett 107(2):027001]. Conventional understanding of the electrostatic doping is in terms of modifications of the charge density to screen the electric field generated at the double layer. However, it has been recently reported that the suppression of the metal to insulator transition induced in VO2 by ionic liquid gating is due to oxygen vacancy formation rather than to electrostatic doping [Jeong J, et al...
December 27, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27896190/the-use-of-locally-applied-vibration-to-minimize-pain-during-fractional-co2-laser-therapy-in-living-liver-donor-scar-management
#5
Sinyoung Song, Dong Hoon Choi, Tae Suk Oh
BACKGROUND: Fractional CO2 laser is an effective treatment for scars, but most patients complain about sharp burning pain, even after the application of lidocaine ointment. This study analyzed the impact of a vibrating device to nonpharmacologically reduce the acute pain of laser treatment, in accordance with the gate control theory of pain management. METHODS: This is a prospective study performed from May 2013 through March 2014. Fifty-three patients (mean age, 26...
November 2016: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/27891403/efficacy-of-transcutaneous-electrical-nerve-stimulation-in-the-treatment-of-overactive-bladder
#6
Nidhi Sharma, Kaja Rekha, Krishnamurthy Jayashree Srinivasan
INTRODUCTION: Overactive Bladder (OAB) accounts for 40-70% cases of incontinence. The etiology is unknown though detrusor instability is found in urodynamic evaluation of almost all cases. Detrusor instability or hyperreflexia can be inhibited by direct inhibition of impulses in the pre-ganglionic afferent neuron or by inhibition of bladder pre-ganglionic neurons of the efferent limb of micturition reflex. Transcutaneous Electrical Nerve Stimulation (TENS) is based on the gate control theory of abolishing the local micturition reflex arc...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27843683/spinal-neuromodulation-as-a-novel-surgical-option-for-failed-back-surgery-syndrome-following-rhbmp-exuberant-bony-growth-in-instrumented-lumbar-fusion-a-case-report-and-literature-review
#7
Ramsis F Ghaly, Alexei Lissounov, Tatiana Tverdohleb, David Kohanchi, Kenneth D Candido, Nebojsa Nick Knezevic
BACKGROUND: Bone morphogenic protein (BMP) for instrumented lumbar fusion was approved in 2002, and since then has led to an increasing incidence of BMP-related neuropathic pain. These patients are usually resistant to conventional medical therapy and frequently undergo multiple surgical revisions without any pain relief. CASE DESCRIPTION: A 58-year-old male was referred to the author's outpatient clinic after four lumbar surgeries did not provide satisfactory pain relief...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27714115/size-tunable-synthesis-of-monolayer-mos2-nanoparticles-and-their-applications-in-non-volatile-memory-devices
#8
Jaeho Jeon, Jinhee Lee, Gwangwe Yoo, Jin-Hong Park, Geun Young Yeom, Yun Hee Jang, Sungjoo Lee
We report the CVD synthesis of a monolayer of MoS2 nanoparticles such that the nanoparticle size was controlled over the range 5-100 nm and the chemical potential of sulfur was modified, both by controlling the hydrogen flow rate during the CVD process. As the hydrogen flow rate was increased, the reaction process of sulfur changed from a "sulfiding" process to a "sulfo-reductive" process, resulting in the growth of smaller MoS2 nanoparticles on the substrates. The size control, crystalline quality, chemical configuration, and distribution uniformity of the CVD-grown monolayer MoS2 nanoparticles were confirmed...
September 29, 2016: Nanoscale
https://www.readbyqxmd.com/read/27618609/why-acupuncture-in-pain-treatment
#9
REVIEW
Alena Ondrejkovicova, Gabriel Petrovics, Katarína Svitkova, Bibiana Bajtekova, Ondrej Bangha
Acupuncture is one of the branches of Chinese Traditional Medicine dating back almost 5 000 years. The expansion of China's trade and business relations with other Asian countries brought about the spreading of acupuncture in 7th Century. Nowadays, acupuncture is an interdisciplinary clinical field of Medicine dealing with treatment, diagnostics and prevention of mainly functional disorders, algic, allergic and addictive conditions of various etiology, localization and intensity. It draws from the millennia of experience of Oriental Medicine as well as contemporary knowledge of morphology, physiology and neurophysiology...
July 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/27594698/an-open-source-solution-for-advanced-imaging-flow-cytometry-data-analysis-using-machine-learning
#10
Holger Hennig, Paul Rees, Thomas Blasi, Lee Kamentsky, Jane Hung, David Dao, Anne E Carpenter, Andrew Filby
Imaging flow cytometry (IFC) enables the high throughput collection of morphological and spatial information from hundreds of thousands of single cells. This high content, information rich image data can in theory resolve important biological differences among complex, often heterogeneous biological samples. However, data analysis is often performed in a highly manual and subjective manner using very limited image analysis techniques in combination with conventional flow cytometry gating strategies. This approach is not scalable to the hundreds of available image-based features per cell and thus makes use of only a fraction of the spatial and morphometric information...
January 1, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/27553899/auditory-thalamic-circuits-and-gabaa-receptor-function-putative-mechanisms-in-tinnitus-pathology
#11
Donald M Caspary, Daniel A Llano
Tinnitus is defined as a phantom sound (ringing in the ears), and can significantly reduce the quality of life for those who suffer its effects. Ten to fifteen percent of the general adult population report symptoms of tinnitus with 1-2% reporting that tinnitus negatively impacts their quality of life. Noise exposure is the most common cause of tinnitus and the military environment presents many challenging high-noise situations. Military noise levels can be so intense that standard hearing protection is not adequate...
August 20, 2016: Hearing Research
https://www.readbyqxmd.com/read/27545714/identification-of-early-ret-deep-dorsal-spinal-cord-interneurons-in-gating-pain
#12
Lian Cui, Xuerong Miao, Lingli Liang, Ishmail Abdus-Saboor, William Olson, Michael S Fleming, Minghong Ma, Yuan-Xiang Tao, Wenqin Luo
The gate control theory (GCT) of pain proposes that pain- and touch-sensing neurons antagonize each other through spinal cord dorsal horn (DH) gating neurons. However, the exact neural circuits underlying the GCT remain largely elusive. Here, we identified a new population of deep layer DH (dDH) inhibitory interneurons that express the receptor tyrosine kinase Ret neonatally. These early RET+ dDH neurons receive excitatory as well as polysynaptic inhibitory inputs from touch- and/or pain-sensing afferents. In addition, they negatively regulate DH pain and touch pathways through both pre- and postsynaptic inhibition...
September 7, 2016: Neuron
https://www.readbyqxmd.com/read/27533335/effect-of-vibration-on-pain-response-to-heel-lance-a-pilot-randomized-control-trial
#13
Kate McGinnis, Eileen Murray, Brooke Cherven, Courtney McCracken, Curtis Travers
BACKGROUND: Applied mechanical vibration in pediatric and adult populations has been shown to be an effective analgesic for acute and chronic pain, including needle pain. Studies among the neonatal population are lacking. According to the Gate Control Theory, it is expected that applied mechanical vibration will have a summative effect with standard nonpharmacologic pain control strategies, reducing behavioral and physiologic pain responses to heel lancing. PURPOSE: To determine the safety and efficacy of mechanical vibration for relief of heel lance pain among neonates...
December 2016: Advances in Neonatal Care: Official Journal of the National Association of Neonatal Nurses
https://www.readbyqxmd.com/read/27424767/quantum-computation-based-on-photonic-systems-with-two-degrees-of-freedom-assisted-by-the-weak-cross-kerr-nonlinearity
#14
Ming-Xing Luo, Hui-Ran Li, Hong Lai
Most of previous quantum computations only take use of one degree of freedom (DoF) of photons. An experimental system may possess various DoFs simultaneously. In this paper, with the weak cross-Kerr nonlinearity, we investigate the parallel quantum computation dependent on photonic systems with two DoFs. We construct nearly deterministic controlled-not (CNOT) gates operating on the polarization spatial DoFs of the two-photon or one-photon system. These CNOT gates show that two photonic DoFs can be encoded as independent qubits without auxiliary DoF in theory...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27299184/electron-transport-in-graphene-nanoribbon-field-effect-transistor-under-bias-and-gate-voltages-isochemical-potential-approach
#15
Jeonghun Yun, Geunsik Lee, Kwang S Kim
Zigzag graphene nanoribbon (zGNR) of narrow width has a moderate energy gap in its antiferromagnetic ground state. So far, first-principles electron transport calculations have been performed using nonequilibrium Green function (NEGF) method combined with density functional theory (DFT). However, the commonly practiced bottom-gate control has not been studied computationally due to the need to simulate an electron reservoir that fixes the chemical potential of electrons in the zGNR and electrodes. Here, we present the isochemical potential scheme to describe the top/back-gate effect using external potential...
July 7, 2016: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/27133030/genetic-blockade-of-adenosine-a2a-receptors-induces-cognitive-impairments-and-anatomical-changes-related-to-psychotic-symptoms-in-mice
#16
Maria Moscoso-Castro, Irene Gracia-Rubio, Francisco Ciruela, Olga Valverde
Schizophrenia is a chronic severe mental disorder with a presumed neurodevelopmental origin, and no effective treatment. Schizophrenia is a multifactorial disease with genetic, environmental and neurochemical etiology. The main theories on the pathophysiology of this disorder include alterations in dopaminergic and glutamatergic neurotransmission in limbic and cortical areas of the brain. Early hypotheses also suggested that nucleoside adenosine is a putative affected neurotransmitter system, and clinical evidence suggests that adenosine adjuvants improve treatment outcomes, especially in poorly responsive patients...
July 2016: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/27127219/automatic-extraction-of-myocardial-mass-and-volume-using-parametric-images-from-dynamic-nongated-pet
#17
Hendrik Johannes Harms, Nils Henrik Stubkjær Hansson, Lars Poulsen Tolbod, Won Yong Kim, Steen Jakobsen, Kirsten Bouchelouche, Henrik Wiggers, Jørgen Frøkiaer, Jens Sörensen
UNLABELLED: Dynamic cardiac PET is used to quantify molecular processes in vivo. However, measurements of left ventricular (LV) mass and volume require electrocardiogram-gated PET data. The aim of this study was to explore the feasibility of measuring LV geometry using nongated dynamic cardiac PET. METHODS: Thirty-five patients with aortic-valve stenosis and 10 healthy controls underwent a 27-min (11)C-acetate PET/CT scan and cardiac MRI (CMR). The controls were scanned twice to assess repeatability...
September 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27113392/excitation-of-propagating-spin-waves-in-ferromagnetic-nanowires-by-microwave-voltage-controlled-magnetic-anisotropy
#18
Roman Verba, Mario Carpentieri, Giovanni Finocchio, Vasil Tiberkevich, Andrei Slavin
The voltage-controlled magnetic anisotropy (VCMA) effect, which manifests itself as variation of anisotropy of a thin layer of a conductive ferromagnet on a dielectric substrate under the influence of an external electric voltage, can be used for the development of novel information storage and signal processing devices with low power consumption. Here it is demonstrated by micromagnetic simulations that the application of a microwave voltage to a nanosized VCMA gate in an ultrathin ferromagnetic nanowire results in the parametric excitation of a propagating spin wave, which could serve as a carrier of information...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27094686/fast-flexible-transistors-with-a-nanotrench-structure
#19
Jung-Hun Seo, Tao Ling, Shaoqin Gong, Weidong Zhou, Alice L Ma, L Jay Guo, Zhenqiang Ma
The simplification of fabrication processes that can define very fine patterns for large-area flexible radio-frequency (RF) applications is very desirable because it is generally very challenging to realize submicron scale patterns on flexible substrates. Conventional nanoscale patterning methods, such as e-beam lithography, cannot be easily applied to such applications. On the other hand, recent advances in nanoimprinting lithography (NIL) may enable the fabrication of large-area nanoelectronics, especially flexible RF electronics with finely defined patterns, thereby significantly broadening RF applications...
April 20, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27088014/the-gate-theory-of-pain-revisited-modeling-different-pain-conditions-with-a-parsimonious-neurocomputational-model
#20
Francisco Javier Ropero Peláez, Shirley Taniguchi
The gate control theory of pain proposed by Melzack and Wall in 1965 is revisited through two mechanisms of neuronal regulation: NMDA synaptic plasticity and intrinsic plasticity. The Melzack and Wall circuit was slightly modified by using strictly excitatory nociceptive afferents (in the original arrangement, nociceptive afferents were considered excitatory when they project to central transmission neurons and inhibitory when projecting to substantia gelatinosa). The results of our neurocomputational model are consistent with biological ones in that nociceptive signals are blocked on their way to the brain every time a tactile stimulus is given at the same locus where the pain was produced...
2016: Neural Plasticity
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