keyword
MENU ▼
Read by QxMD icon Read
search

Variable-time

keyword
https://www.readbyqxmd.com/read/28334187/individual-differences-in-human-auditory-processing-insights-from-single-trial-auditory-midbrain-activity-in-an-animal-model
#1
Travis White-Schwoch, Trent Nicol, Catherine M Warrier, Daniel A Abrams, Nina Kraus
Auditory-evoked potentials are classically defined as the summations of synchronous firing along the auditory neuraxis. Converging evidence supports a model whereby timing jitter in neural coding compromises listening and causes variable scalp-recorded potentials. Yet the intrinsic noise of human scalp recordings precludes a full understanding of the biological origins of individual differences in listening skills. To delineate the mechanisms contributing to these phenomena, in vivo extracellular activity was recorded from inferior colliculus in guinea pigs to speech in quiet and noise...
October 5, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/28327492/pet-therapy-an-effective-strategy-to-care-for-the-elderly-an-experimental-study-in-a-nursing-home
#2
Alfonso Sollami, Elisa Gianferrari, Manuela Alfieri, Giovanna Artioli, Chiara Taffurelli
BACKGROUND AND AIM: There has recently been a growing interest towards patients' affective and emotional needs, especially in relational therapies, which are considered vital as to increase the understanding of those needs and patients' well-being. In particular, we paid attention to those patients who are forced to spend the last phase of their existence in residential facilities, namely elderly people in nursing homes, who often feel marginalized, useless, depressed, unstimulated or unable to communicate...
March 14, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28306724/respiratory-dna-viruses-are-undetectable-in-nasopharyngeal-secretions-from-adenotonsillectomized-children
#3
Ronaldo Bragança Martins, Lucas Penna Rocha, Mirela Moreira Prates, Talita Bianca Gagliardi, Balduino Biasoli, Marcelo Junqueira Leite, Guilherme Buzatto, Miguel Angelo Hyppolito, Davi Casale Aragon, Edwin Tamashiro, Fabiana Cardoso Pereira Valera, Eurico Arruda, Wilma Terezinha Anselmo-Lima
Respiratory viruses are frequently detected in association with chronic tonsillar hypertrophy in the absence of symptoms of acute respiratory infection (ARI). The present analysis was done in follow-up to a previous clinical study done by this same group. Nasopharyngeal washes (NPWs) were obtained from 83 of 120 individuals at variable times post adenotonsillectomy, in the absence of ARI symptoms. A look back at virus detection results in NPWs from the same 83 individuals at the time of tonsillectomy revealed that 73...
2017: PloS One
https://www.readbyqxmd.com/read/28279660/validity-of-the-instrumented-push-and-release-test-to-quantify-postural-responses-in-persons-with-multiple-sclerosis
#4
Mahmoud El-Gohary, Daniel Peterson, Geetanjali Gera, Fay B Horak, Jessie M Huisinga
OBJECTIVE: To test the validity of wearable inertial sensors to provide objective measures of postural stepping responses to the Push and Release clinical test in people with multiple sclerosis DESIGN: Cross-sectional SETTING: University medical center balance disorders laboratory PARTICIPANTS: 52 PwMS and 21 age-matched healthy controls MAIN OUTCOME MEASURES: stepping latency, time and number of steps required to reach stability, and initial step length were calculated from three inertial measurement units placed on participants' lumbar spine and feet...
March 6, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28239905/estimators-for-longitudinal-latent-exposure-models-examining-measurement-model-assumptions
#5
Brisa N Sánchez, Sehee Kim, Mary D Sammel
Latent variable (LV) models are increasingly being used in environmental epidemiology as a way to summarize multiple environmental exposures and thus minimize statistical concerns that arise in multiple regression. LV models may be especially useful when multivariate exposures are collected repeatedly over time. LV models can accommodate a variety of assumptions but, at the same time, present the user with many choices for model specification particularly in the case of exposure data collected repeatedly over time...
February 27, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28195515/targeting-cell-adhesion-molecules-with-nanoparticles-using-in%C3%A2-vivo-and-flow-based-in%C3%A2-vitro-models-of-atherosclerosis
#6
Khosrow Khodabandehlou, Jacqueline J Masehi-Lano, Christopher Poon, Jonathan Wang, Eun Ji Chung
Atherosclerosis is a leading cause of death worldwide; in addition to lipid dysfunction, chronic arterial wall inflammation is a key component of atherosclerosis. Techniques that target cell adhesion molecules, which are overexpressed during inflammation, are effective methods to detect and treat atherosclerosis. Specifically, research groups have identified vascular cell adhesion molecule-1, intercellular adhesion molecule-1, platelet endothelial cell adhesion molecule, and selectins (E-selectin and P-selectin) as correlated to atherogenesis...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28192363/combined-risk-assessment-of-nonstationary-monthly-water-quality-based-on-markov-chain-and-time-varying-copula
#7
Wei Shi, Jun Xia
Water quality risk management is a global hot research linkage with the sustainable water resource development. Ammonium nitrogen (NH3-N) and permanganate index (CODMn) as the focus indicators in Huai River Basin, are selected to reveal their joint transition laws based on Markov theory. The time-varying moments model with either time or land cover index as explanatory variables is applied to build the time-varying marginal distributions of water quality time series. Time-varying copula model, which takes the non-stationarity in the marginal distribution and/or the time variation in dependence structure between water quality series into consideration, is constructed to describe a bivariate frequency analysis for NH3-N and CODMn series at the same monitoring gauge...
February 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28191484/photoinduced-molecular-chirality-probed-by-ultrafast-resonant-x-ray-spectroscopy
#8
Jérémy R Rouxel, Markus Kowalewski, Shaul Mukamel
Recently developed circularly polarized X-ray light sources can probe the ultrafast chiral electronic and nuclear dynamics through spatially localized resonant core transitions. We present simulations of time-resolved circular dichroism signals given by the difference of left and right circularly polarized X-ray probe transmission following an excitation by a circularly polarized optical pump with the variable time delay. Application is made to formamide which is achiral in the ground state and assumes two chiral geometries upon optical excitation to the first valence excited state...
July 2017: Structural Dynamics (Melville, N.Y.)
https://www.readbyqxmd.com/read/28176821/spatial-variation-and-inconsistency-between-estimates-of-onset-of-muscle-activation-from-emg-and-ultrasound
#9
Angela V Dieterich, Alberto Botter, Taian Martins Vieira, Anneli Peolsson, Frank Petzke, Paul Davey, Deborah Falla
Delayed onset of muscle activation can be a descriptor of impaired motor control. Activation onset can be estimated from electromyography (EMG)-registered muscle excitation and from ultrasound-registered muscle motion, which enables non-invasive measurements in deep muscles. However, in voluntary activation, EMG- and ultrasound-detected activation onsets may not correspond. To evaluate this, ten healthy men performed isometric elbow flexion at 20% to 70% of their maximal force. Utilising a multi-channel electrode transparent to ultrasound, EMG and M(otion)-mode ultrasound were recorded simultaneously over the biceps brachii muscle...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28158296/characteristics-of-cyclist-crashes-in-italy-using-latent-class-analysis-and-association-rule-mining
#10
Gabriele Prati, Marco De Angelis, Víctor Marín Puchades, Federico Fraboni, Luca Pietrantoni
The factors associated with severity of the bicycle crashes may differ across different bicycle crash patterns. Therefore, it is important to identify distinct bicycle crash patterns with homogeneous attributes. The current study aimed at identifying subgroups of bicycle crashes in Italy and analyzing separately the different bicycle crash types. The present study focused on bicycle crashes that occurred in Italy during the period between 2011 and 2013. We analyzed categorical indicators corresponding to the characteristics of infrastructure (road type, road signage, and location type), road user (i...
2017: PloS One
https://www.readbyqxmd.com/read/28157669/waiting-2%C3%A2-minutes-after-sucrose-administration-unnecessary
#11
Naomi Meesters, Sinno Simons, Joost van Rosmalen, Irwin Reiss, John van den Anker, Monique van Dijk
BACKGROUND: Worldwide, oral sucrose is standard of care in many neonatal intensive care units to relieve procedural pain in neonates. This study aims to determine if time interval between sucrose administration and heelstick correlates with pain scores. METHODS: Neonates were prospectively studied with variable time intervals and assessed with the Premature Infant Pain Profile-Revised (PIPP-R). RESULTS: 150 neonates were included with a median gestational age of 30(+6) (IQR 27(+6)-33(+2)) weeks and a median time interval of 72 (IQR 39-115) seconds between sucrose administration and heelstick...
March 2017: Archives of Disease in Childhood. Fetal and Neonatal Edition
https://www.readbyqxmd.com/read/28129954/-reactive-arthritis-due-to-clostridium-difficile-report-of-two-cases-and-literature-review
#12
P Garrigues, T de Roux, E Georgilopoulos, E Wanono, A Mathieu
INTRODUCTION: Reactive arthritis due to Clostridium difficile infection is uncommon. CASE REPORTS: We report two cases of reactive arthritis associated with C. difficile infection that occurred in a 40-year-old woman and a 47-year-old man. The literature review between 1976 (date of first reported case) and 2016 retrieved 54 observations (including our two cases). Reactive arthritis occurs most frequently in young subjects after a variable time frame according to C...
January 24, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28125504/therapeutic-drug-monitoring-of-everolimus-comparability-of-concentrations-determined-by-2-immunoassays-and-a-liquid-chromatography-tandem-mass-spectrometry-method
#13
Maria Shipkova, Sonja Rapp, Raül Rigo-Bonnin, Eberhard Wieland, Andreas Peter
BACKGROUND: Therapeutic drug monitoring is recommended to guide therapy with the immunosuppressant everolimus (EVL) in solid organ transplantation to prevent rejections and to limit toxicity. For therapeutic drug monitoring, predose EVL concentrations are measured in whole blood mainly by liquid chromatography tandem mass spectrometry (LC-MS/MS). In addition, 2 immunoassays [Quantitative Microsphere System (QMS) EVL and Elecsys EVL] are commercially available. The aim of this study was to evaluate the comparability of EVL results determined with the 2 immunoassays and a validated LC-MS/MS test using samples from kidney, liver, and heart transplant (KT, LT, and HT, respectively) recipients...
April 2017: Therapeutic Drug Monitoring
https://www.readbyqxmd.com/read/28119257/diagnosis-and-outcomes-of-collateral-arterial-formation-after-irreversible-early-hepatic-artery-thrombosis-in-pediatric-liver-recipients
#14
Li-Hong Gu, Feng-Hua Li, Qiang Xia, Hua Fang, Shi-Jun Zhang, Long-Zhi Han
BACKGROUND: Early hepatic artery thrombosis (eHAT) has been recognized as an important cause of graft loss and mortality. However, the incidence, etiology and outcome are not clear, especially for children. The present study was to investigate the formation of collateral artery flow after irreversible eHAT and its impact on patient's prognosis. METHODS: We analyzed eHAT after liver transplantation in children from October 2006 to April 2015 in our center, illustrated the formation of collateral hepatic artery flow after irreversible eHAT and explored the diagnosis, complications, treatment and prognosis...
February 2017: Hepatobiliary & Pancreatic Diseases International: HBPD INT
https://www.readbyqxmd.com/read/28118045/impact-of-a-paper-based-dynamic-insulin-infusion-protocol-on-glycemic-variability-time-in-target-and-hypoglycemic-risk-a-stepped-wedge-trial-in-medical-intensive-care-unit-patients
#15
Antoine Clergeau, Jean-Jacques Parienti, Yves Reznik, Deborah Clergeau, Amelie Seguin, Xavier Valette, Damien du Cheyron, Michael Joubert
BACKGROUND: Stress-induced hyperglycemia is a common feature of intensive care unit (ICU) patients. Besides mean blood glucose (BG) level, glucose variability and hypoglycemia have been highlighted as independent predictors of ICU and hospital mortality. Recent ICU recommendations suggest using insulin infusion protocols that can minimize glucose variability and hypoglycemic risk. Our aim was to assess the efficacy, safety, and acceptance by nurses of a paper-based simple dynamic insulin protocol compared with those by nurses of a paper-based static protocol...
February 2017: Diabetes Technology & Therapeutics
https://www.readbyqxmd.com/read/28105655/imperfect-de-convolution-may-introduce-spurious-psychophysiological-interactions-and-how-to-avoid-it
#16
Xin Di, Richard C Reynolds, Bharat B Biswal
Psychophysiological interaction (PPI) is a widely used regression-based method to study connectivity changes in different experimental conditions. A PPI effect is generated by point-by-point multiplication of a psychological variable (experimental design) and a physiological variable (time series of a seed region). If the psychological variable is non-centered with a constant component, the constant component will add a physiological variable to the PPI term. The physiological component would in theory be accounted for by the physiological main effect in the model...
January 20, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28098494/constant-and-variable-time-delays-of-synchrony-of-facial-expressions-in-dyadic-conversations
#17
M Joseph Meyer
No abstract text is available yet for this article.
January 2017: Multivariate Behavioral Research
https://www.readbyqxmd.com/read/28097673/schoolyard-shade-and-sun-exposure-assessment-of-personal-monitoring-during-children-s-physical-activity
#18
Jennifer K Vanos, Grant R McKercher, Kylie Naughton, Marc Lochbaum
Childhood exposure to ultraviolet radiation (UVR) is a major risk factor for the development of melanoma later in life. However, it is challenging to accurately determine personal outdoor exposure to UVR, specifically erythemally weighted UVR (UVEry ), due to technological constraints, variable time-activity patterns, and the influence of outdoor environmental design. To address this challenge, this study utilized mobile and stationary techniques to examine the UVEry exposures of 14 children in a schoolyard in Lubbock, TX, in spring 2016...
January 18, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28096408/rhythm-judgments-reveal-a-frequency-asymmetry-in-the-perception-and-neural-coding-of-sound-synchrony
#19
Magdalena Wojtczak, Anahita H Mehta, Andrew J Oxenham
In modern Western music, melody is commonly conveyed by pitch changes in the highest-register voice, whereas meter or rhythm is often carried by instruments with lower pitches. An intriguing and recently suggested possibility is that the custom of assigning rhythmic functions to lower-pitch instruments may have emerged because of fundamental properties of the auditory system that result in superior time encoding for low pitches. Here we compare rhythm and synchrony perception between low- and high-frequency tones, using both behavioral and EEG techniques...
January 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28093579/progression-of-transsynaptic-retinal-degeneration-with-spectral-domain-optical-coherence-tomography
#20
Stephen G Schwartz, Armando Monroig, Harry W Flynn
PURPOSE: To illustrate the progression of retrograde transsynaptic retinal degeneration using spectral- domain optical coherence tomography (SD-OCT). OBSERVATIONS: A 60 year-old man with a stroke was followed over a 17-month period using SD-OCT of the macula, ganglion cell layer (GCC), and retinal nerve fiber layer. Transsynaptic retinal degeneration progressed over this time. CONCLUSIONS AND IMPORTANCE: Retrograde transsynaptic retinal degeneration may occur in patients with homonymous visual field loss caused by post-geniculate neurologic disease...
April 2017: American Journal of Ophthalmology Case Reports
keyword
keyword
112579
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"