keyword
MENU ▼
Read by QxMD icon Read
search

Circuit

keyword
https://www.readbyqxmd.com/read/28749550/combined-resistance-and-endurance-training-at-a-moderate-high-intensity-improves-physical-condition-and-quality-of-life-in-liver-transplant-patients
#1
Diego Moya-Nájera, Ángel Moya-Herraiz, Luis Compte-Torrero, David Hervás, Sebastien Borreani, Joaquin Calatayud, Marina Berenguer, Juan C Colado
BACKGROUND: Although currently, moderate and high intensity concurrent physical exercise is prescribed in populations with special needs due to its greater effect on physical condition and health-related quality of life (HRQOL), there are no data in the liver transplantation (LT) setting. AIM: To evaluate changes in maximal strength, aerobic capacity, body composition, liver function, and HRQOL in LT patients after a moderate to high intensity combined resistance-endurance training...
July 27, 2017: Liver Transplantation
https://www.readbyqxmd.com/read/28749524/academic-outcomes-and-cognitive-performance-in-problematic-internet-users
#2
María Marín Vila, José Luis Carballo Crespo, Ainhoa Coloma Carmona
Only few studies have examined the relationship between problematic Internet use (PIU) and cognitive and academic performance in adolescents. The aim of this study was to analyze the differences in academic and cognitive performance (perception, attention, memory, verbal fluency and abstract reasoning) between adolescents with and without PIU. A total of 575 students from different high schools of the region of Alicante participated. Students were divided into two groups: adolescents with and without PIU (PIU and NPIU, respectively)...
July 13, 2017: Adicciones
https://www.readbyqxmd.com/read/28749345/noise-in-neuronal-and-electronic-circuits-a-general-modeling-framework-and-non-monte-carlo-simulation-techniques
#3
Deniz Kilinc, Alper Demir
The brain is extremely energy efficient and remarkably robust in what it does despite the considerable variability and noise caused by the stochastic mechanisms in neurons and synapses. Computational modeling is a powerful tool that can help us gain insight into this important aspect of brain mechanism. A deep understanding and computational design tools can help develop robust neuromorphic electronic circuits and hybrid neuroelectronic systems. In this paper, we present a general modeling framework for biological neuronal circuits that systematically captures the nonstationary stochastic behavior of ion channels and synaptic processes...
August 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28749344/giant-magnetoresistive-biosensor-array-for-detecting-magnetorelaxation
#4
Xiahan Zhou, Chih-Cheng Huang, Drew A Hall
In this paper, a time-domain magnetorelaxometry biosensing scheme is presented using giant magnetoresistive (GMR) sensors to measure the fast relaxation response of superparamagnetic magnetic nanoparticles (MNPs) in a pulsed magnetic field. The system consists of an 8 × 10 GMR sensor array, a Helmholtz coil, an electromagnet driver, and an integrator-based analog front-end needed to capture the fast relaxation dynamics of MNPs. A custom designed electromagnet driver and Helmholtz coil improve the switch-off speed to >5 Oe/μs, limiting the dead zone time to <10 μs, and thus enables the system to monitor fast relaxation processes of 30 nm MNPs...
August 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28749342/broadband-vibration-detection-in-tissue-phantoms-using-a-fiber-fabry-perot-cavity
#5
Jack Barnes, Sijia Li, Apoorv Goyal, Purang Abolmaesumi, Parvin Mousavi, Hans-Peter Loock
A fiber optic vibration sensor is developed and characterized with an ultra-wide dynamic sensing range, from less than 1 Hz to clinical ultrasound frequencies near 6 MHz. The vibration sensor consists of a matched pair of fiber Bragg gratings coupled to a custom-built signal processing circuit. The wavelength of a laser diode is locked to one of the many cavity resonances using the Pound-Drever-Hall scheme. A calibrated piezoelectric vibration element was used to characterize the sensor's strain, temperature, and noise responses...
July 24, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28749338/fast-two-photon-imaging-of-subcellular-voltage-dynamics-in-neuronal-tissue-with-genetically-encoded-indicators
#6
Simon Chamberland, Helen H Yang, Michael M Pan, Stephen W Evans, Sihui Guan, Mariya Chavarha, Ying Yang, Charleen Salesse, Haodi Wu, Joseph C Wu, Thomas R Clandinin, Katalin Toth, Michael Z Lin, François St-Pierre
Monitoring voltage dynamics in defined neurons deep in the brain is critical for unraveling the function of neuronal circuits, but is challenging due to the limited performance of existing tools. In particular, while genetically encoded voltage indicators have shown promise for optical detection of voltage transients, many indicators exhibit low sensitivity when imaged under two-photon illumination. Previous studies thus fell short of visualizing voltage dynamics in individual neurons in single trials. Here, we report ASAP2s, a novel voltage indicator with improved sensitivity...
July 27, 2017: ELife
https://www.readbyqxmd.com/read/28749067/haemolysis-in-haemodialysis
#7
REVIEW
Dhakshayini Tharmaraj, Peter G Kerr
Haemolysis in haemodialysis, although rare in current times, is associated with significant mortality and morbidity. As such prompt recognition, treatment, analysis of root cause and correction of underlying causative factors is crucial. Dialysate, extracorporeal circuit and patient related factors all contribute to haemolysis risk. Haemolysis can manifest with non-specific signs and symptoms including but not restricted to hypertension, nausea, pain (abdominal, chest, back) and dyspnoea. It may present acutely during the dialysis session or may take a protracted course...
July 27, 2017: Nephrology
https://www.readbyqxmd.com/read/28748369/classical-experiments-in-whole-body-metabolism-closed-circuit-respirometry
#8
REVIEW
Bruno Archiza, Joseph F Welch, A William Sheel
As part of a series of reviews aimed at providing historical context to the study of whole-body metabolism, this article focuses on the technique of closed-circuit respirometry. Developed by nineteenth century physiologists Henri-Victor Regnault and Jules de Reiset, a constant-pressure closed-circuit calorimeter capable of measuring oxygen consumption and carbon dioxide production in small animals became the framework for future experiments on whole-body metabolism in humans. The volume-loss and volume-replenishment techniques can be used to indirectly assess energy expenditure using an oxygen reservoir; spirometers are simplistic in design but difficult to operate...
July 26, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28748312/the-extended-object-grasping-network
#9
REVIEW
Marzio Gerbella, Stefano Rozzi, Giacomo Rizzolatti
Grasping is the most important skilled motor act of primates. It is based on a series of sensorimotor transformations through which the affordances of the objects to be grasped are transformed into appropriate hand movements. It is generally accepted that a circuit formed by inferior parietal areas AIP and PFG and ventral premotor area F5 represents the core circuit for sensorimotor transformations for grasping. However, selection and control of appropriate grip should also depend on higher-order information, such as the meaning of the object to be grasped, and the overarching goal of the action in which grasping is embedded...
July 26, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28747883/obstacle-avoidance-and-target-acquisition-for-robot-navigation-using-a-mixed-signal-analog-digital-neuromorphic-processing-system
#10
Moritz B Milde, Hermann Blum, Alexander Dietmüller, Dora Sumislawska, Jörg Conradt, Giacomo Indiveri, Yulia Sandamirskaya
Neuromorphic hardware emulates dynamics of biological neural networks in electronic circuits offering an alternative to the von Neumann computing architecture that is low-power, inherently parallel, and event-driven. This hardware allows to implement neural-network based robotic controllers in an energy-efficient way with low latency, but requires solving the problem of device variability, characteristic for analog electronic circuits. In this work, we interfaced a mixed-signal analog-digital neuromorphic processor ROLLS to a neuromorphic dynamic vision sensor (DVS) mounted on a robotic vehicle and developed an autonomous neuromorphic agent that is able to perform neurally inspired obstacle-avoidance and target acquisition...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28747874/the-functioning-of-a-cortex-without-layers
#11
REVIEW
Julien Guy, Jochen F Staiger
A major hallmark of cortical organization is the existence of a variable number of layers, i.e., sheets of neurons stacked on top of each other, in which neurons have certain commonalities. However, even for the neocortex, variable numbers of layers have been described and it is just a convention to distinguish six layers from each other. Whether cortical layers are a structural epiphenomenon caused by developmental dynamics or represent a functionally important modularization of cortical computation is still unknown...
2017: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/28747755/hacking-dna-copy-number-for-circuit-engineering
#12
Feilun Wu, Lingchong You
DNA copy number represents an essential parameter in the dynamics of synthetic gene circuits but typically is not explicitly considered. A new study demonstrates how dynamic control of DNA copy number can serve as an effective strategy to program robust oscillations in gene expression circuits.
July 27, 2017: Nature Genetics
https://www.readbyqxmd.com/read/28747706/titanium-dioxide-engineered-for-near-dispersionless-high-terahertz-permittivity-and-ultra-low-loss
#13
Chuying Yu, Yang Zeng, Bin Yang, Robert Donnan, Jinbao Huang, Zhaoxian Xiong, Amit Mahajan, Baogui Shi, Haitao Ye, Russell Binions, Nadezda V Tarakina, Mike J Reece, Haixue Yan
Realising engineering ceramics to serve as substrate materials in high-performance terahertz(THz) that are low-cost, have low dielectric loss and near-dispersionless broadband, high permittivity, is exceedingly demanding. Such substrates are deployed in, for example, integrated circuits for synthesizing and converting nonplanar and 3D structures into planar forms. The Rutile form of titanium dioxide (TiO2) has been widely accepted as commercially economical candidate substrate that meets demands for both low-loss and high permittivities at sub-THz bands...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747660/4-dimensional-functional-profiling-in-the-convulsant-treated-larval-zebrafish-brain
#14
Matthew J Winter, Dylan Windell, Jeremy Metz, Peter Matthews, Joe Pinion, Jonathan T Brown, Malcolm J Hetheridge, Jonathan S Ball, Stewart F Owen, Will S Redfern, Julian Moger, Andrew D Randall, Charles R Tyler
Functional neuroimaging, using genetically-encoded Ca(2+) sensors in larval zebrafish, offers a powerful combination of high spatiotemporal resolution and higher vertebrate relevance for quantitative neuropharmacological profiling. Here we use zebrafish larvae with pan-neuronal expression of GCaMP6s, combined with light sheet microscopy and a novel image processing pipeline, for the 4D profiling of chemoconvulsant action in multiple brain regions. In untreated larvae, regions associated with autonomic functionality, sensory processing and stress-responsiveness, consistently exhibited elevated spontaneous activity...
July 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28747623/anterior-cingulate-is-a-source-of-valence-specific-information-about-value-and-uncertainty
#15
Ilya E Monosov
Anterior cingulate cortex (ACC) is thought to control a wide range of reward, punishment, and uncertainty-related behaviors. However, how it does so is unclear. Here, in a Pavlovian procedure in which monkeys displayed a diverse repertoire of reward-related, punishment-related, and uncertainty-related behaviors, we show that many ACC-neurons represent expected value and uncertainty in a valence-specific manner, signaling value or uncertainty predictions about either rewards or punishments. Other ACC-neurons signal prediction information about rewards and punishments by displaying excitation to both (rather than excitation to one and inhibition to the other)...
July 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28747622/coupled-symmetric-and-asymmetric-circuits-underlying-spatial-orientation-in-fruit-flies
#16
Ta-Shun Su, Wan-Ju Lee, Yu-Chi Huang, Cheng-Te Wang, Chung-Chuan Lo
Maintaining spatial orientation when carrying out goal-directed movements requires an animal to perform angular path integration. Such functionality has been recently demonstrated in the ellipsoid body (EB) of fruit flies, though the precise circuitry and underlying mechanisms remain unclear. We analyze recently published cellular-level connectomic data and identify the unique characteristics of the EB circuitry, which features coupled symmetric and asymmetric rings. By constructing a spiking neural circuit model based on the connectome, we reveal that the symmetric ring initiates a feedback circuit that sustains persistent neural activity to encode information regarding spatial orientation, while the asymmetric rings are capable of integrating the angular path when the body rotates in the dark...
July 26, 2017: Nature Communications
https://www.readbyqxmd.com/read/28747471/co-option-of-a-motor-to-sensory-histaminergic-circuit-correlates-with-insect-flight-biomechanics
#17
Phillip D Chapman, Samual P Bradley, Erica J Haught, Kassandra E Riggs, Mouaz M Haffar, Kevin C Daly, Andrew M Dacks
Nervous systems must adapt to shifts in behavioural ecology. One form of adaptation is neural exaptation, in which neural circuits are co-opted to perform additional novel functions. Here, we describe the co-option of a motor-to-somatosensory circuit into an olfactory network. Many moths beat their wings during odour-tracking, whether walking or flying, causing strong oscillations of airflow around the antennae, altering odour plume structure. This self-induced sensory stimulation could impose selective pressures that influence neural circuit evolution, specifically fostering the emergence of corollary discharge circuits...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28747446/transcranial-magnetic-stimulation-distinguishes-alzheimer-disease-from-frontotemporal-dementia
#18
Alberto Benussi, Francesco Di Lorenzo, Valentina Dell'Era, Maura Cosseddu, Antonella Alberici, Salvatore Caratozzolo, Maria Sofia Cotelli, Anna Micheli, Luca Rozzini, Alessandro Depari, Alessandra Flammini, Viviana Ponzo, Alessandro Martorana, Carlo Caltagirone, Alessandro Padovani, Giacomo Koch, Barbara Borroni
OBJECTIVE: To determine whether a transcranial magnetic stimulation (TMS) multiparadigm approach can be used to distinguish Alzheimer disease (AD) from frontotemporal dementia (FTD). METHODS: Paired-pulse TMS was used to investigate short-interval intracortical inhibition (SICI) and facilitation (ICF), long-interval intracortical inhibition, and short-latency afferent inhibition (SAI) to measure the activity of different intracortical circuits in patients with AD, patients with FTD, and healthy controls (HC)...
July 26, 2017: Neurology
https://www.readbyqxmd.com/read/28747385/spinal-racgap-%C3%AE-chimaerin-is-required-to-establish-the-midline-barrier-for-proper-corticospinal-axon-guidance
#19
Shota Katori, Yukiko Noguchi-Katori, Shigeyoshi Itohara, Takuji Iwasato
In the developing central nervous system, the midline barrier, which comprises guidance molecule-expressing midline glial somata and processes, plays a pivotal role in midline axon guidance. Accumulating evidence has revealed the molecular mechanisms by which the midline barrier ensures proper midline guidance for axons. In contrast, the mechanisms for establishing the midline barrier remain obscure. Here we report that RacGAP α-chimaerin (α-chimerin) is required for both axonal repulsion at and establishment of the midline barrier in the spinal cord...
July 26, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28747260/functional-connectivity-of-the-left-dlpfc-to-striatum-predicts-treatment-response-of-depression-to-tms
#20
Michael Avissar, Fon Powell, Irena Ilieva, Matteo Respino, Faith M Gunning, Conor Liston, Marc J Dubin
BACKGROUND: Repetitive transcranial magnetic stimulation (TMS) is a non-invasive, safe, and efficacious treatment for depression. TMS has been shown to normalize abnormal functional connectivity of cortico-cortical circuits in depression and baseline functional connectivity of these circuits predicts treatment response. Less is known about the relationship between functional connectivity of frontostriatal circuits and treatment response. OBJECTIVE/HYPOTHESIS: We investigated whether baseline functional connectivity of distinct frontostriatal circuits predicted response to TMS...
July 13, 2017: Brain Stimulation
keyword
keyword
102734
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"