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https://www.readbyqxmd.com/read/28529478/slow-and-fast-responses-two-mechanisms-of-trial-outcome-processing-revealed-by-eeg-oscillations
#1
Nikita A Novikov, Yulia M Nurislamova, Natalia A Zhozhikashvili, Evgenii E Kalenkovich, Anna A Lapina, Boris V Chernyshev
Cognitive control includes maintenance of task-specific processes related to attention, and non-specific regulation of motor threshold. Depending upon the nature of the behavioral tasks, these mechanisms may predispose to different kinds of errors, with either increased or decreased response time (RT) of erroneous responses relative to correct responses. Specifically, slow responses are related to attentional lapses and decision uncertainty, these conditions tending to delay RTs of both erroneous and correct responses...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28528848/temporal-expectancies-driven-by-self-and-externally-generated-rhythms
#2
Alexander Jones, Yi-Fang Hsu, Lionel Granjon, Florian Waszak
The dynamic attending theory proposes that rhythms entrain periodic fluctuations of attention which modulate the gain of sensory input. However, temporal expectancies can also be driven by the mere passage of time (foreperiod effect). It is currently unknown how these two types of temporal expectancy relate to each other, i.e. whether they work in parallel and have distinguishable neural signatures. The current research addresses this issue. Participants either tapped a 1Hz rhythm (active task) or were passively presented with the same rhythm using tactile stimulators (passive task)...
May 18, 2017: NeuroImage
https://www.readbyqxmd.com/read/28528460/sensory-and-motoric-influences-on-attention-dynamics-during-standing-balance-recovery-in-young-and-older-adults
#3
Mark S Redfern, April J Chambers, J Richard Jennings, Joseph M Furman
This study investigated the impact of attention on the sensory and motor actions during postural recovery from underfoot perturbations in young and older adults. A dual-task paradigm was used involving disjunctive and choice reaction time (RT) tasks to auditory and visual stimuli at different delays from the onset of two types of platform perturbations (rotations and translations). The RTs were increased prior to the perturbation (preparation phase) and during the immediate recovery response (response initiation) in young and older adults, but this interference dissipated rapidly after the perturbation response was initiated (<220 ms)...
May 20, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28525920/torsade-de-pointes-arrhythmias-arise-at-the-site-of-maximal-heterogeneity-of-repolarization-in-the-chronic-complete-atrioventricular-block-dog
#4
Albert Dunnink, Thom R G Stams, Alexandre Bossu, Veronique M F Meijborg, Jet D M Beekman, Sofieke C Wijers, Jacques M T De Bakker, Marc A Vos
Aims: The chronic complete atrioventricular block (CAVB) dog is highly sensitive for drug-induced torsade de pointes (TdP) arrhythmias. Focal mechanisms have been suggested as trigger for TdP onset; however, its exact mechanism remains unclear. In this study, detailed mapping of the ventricles was performed to assess intraventricular heterogeneity of repolarization in relation to the initiation of TdP. Methods and results: In 8 CAVB animals, 56 needles, each containing 4 electrodes, were inserted in the ventricles...
May 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28510498/deficits-in-go-no-go-task-performance-in-male-undergraduate-high-risk-alcohol-users-are-driven-by-speeded-responding-to-go-stimuli
#5
Xin Zhao, Wang Qian, Lily Fu, Joseph H R Maes
BACKGROUND: Response disinhibition plays an important role in addictive behaviors. However, results of studies on the performance on response inhibition tasks of individuals evidencing potentially problematic levels of alcohol drinking are mixed. OBJECTIVES: We assessed conditions under which persons with a relatively high risk of alcohol dependence show inhibition deficits in such tasks and investigated the nature of those deficits. METHODS: Fifty-eight male undergraduate students, 27 of which were high-risk drinkers according to the Alcohol Use Disorders Identification Test, performed a go/no-go inhibition task with differing percentages of no-go trials (50% vs...
February 17, 2017: American Journal of Drug and Alcohol Abuse
https://www.readbyqxmd.com/read/28508717/expanding-the-haitian-rehabilitation-workforce-employment-situation-and-perceptions-of-graduates-from-three-rehabilitation-technician-training-programs
#6
Nancy Descôteaux, Valérie Chagnon, Xin Di Dong, Eric Ellemo, Alessandra Hamelin, Evans Juste, Xavier Laplante, Allison Miron, Philippe Morency, Katherine Samuel, David Charles, Matthew Hunt
PURPOSE: This article examines the employment situation and perceptions of graduates from three rehabilitation technician (RT) programs in Haiti. METHODS: In this mixed method study, 74 of 93 recent graduates completed a questionnaire, and 20 graduates participated in an in-depth qualitative interview. We analyzed survey results using descriptive statistics. We used a qualitative description approach and analyzed the interviews using constant comparative techniques...
February 25, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28505356/distinct-th1-and-th2-cellular-responses-associated-with-malaria-protection-and-risk-in-rts-s-as01e-vaccinees
#7
Gemma Moncunill, Maxmillian Mpina, Augusto J Nhabomba, Ruth Aguilar, Aintzane Ayestaran, Héctor Sanz, Joseph J Campo, Chenjerai Jairoce, Diana Barrios, Yan Dong, Núria Díez-Padrisa, José F Fernandes, Salim Abdulla, Jahit Sacarlal, Nana A Williams, Jaroslaw Harezlak, Benjamin Mordmüller, Selidji T Agnandji, John J Aponte, Claudia Daubenberger, Clarissa Valim, Carlota Dobaño
Background.: The RTS,S/AS01E malaria vaccine has moderate efficacy, lower in infants than children. Current efforts to enhance RTS,S/AS01E efficacy would benefit from learning about the vaccine-induced immunity and identifying correlates of malaria protection, which could, for instance, inform the choice of adjuvants. Here, we sought cellular immunity-based correlates of malaria protection and risk associated with RTS,S/AS01E vaccination. Methods.: We performed a matched case-control study nested within the multicenter African RTS,S/AS01E Phase III trial...
May 13, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28502973/the-job-competency-of-radiological-technologists-in-korea-based-on-specialists-opinion-and-questionnaire-survey
#8
Chang-Seon Lim, Yang-Sub Lee, Yong-Dae Lee, Hyun-Soo Kim, Gye-Hwan Jin, Seong-Youl Choi, Yera Hur
Purpose: Although there are over 40,000 licensed radiological technologists (RTs) in Korea, job competency standards have yet to be defined. This study aims to clarify the job competency of Korean RTs. Methods: A task force team of 11 professional RTs were recruited in order to analyze the job competency of domestic and international RTs. A draft for the job competency of Korean RTs was prepared. A survey was then conducted sampling RTs and the attitudes of their competencies were recorded from May 21 to July 30, 2016...
May 11, 2017: Journal of Educational Evaluation for Health Professions
https://www.readbyqxmd.com/read/28502320/atypical-teratoid-rhabdoid-tumor-arising-in-a-pleomorphic-xanthoastrocytoma-a-rare-entity
#9
Meral Uner, Arzu Saglam, Bilge Can Meydan, Kerim Aslan, Figen Soylemezoglu
Atypical teratoid rhabdoid tumor (AT/RT) is a rare and aggressive tumor usually occurring at younger ages. Pleomorphic xanthoastrocytomas (PXA) on the other hand are quiescent tumors with benign behavior. AT/RTs arising in the setting of PXA are exceptional. We present the case of a 23-year-old female patient, the fourth in the literature, speculated as having AT/RT arising within a PXA, as demonstrated by the presence of INI1 mutation. The patient presented with a short history of headache, which increased over time, and emerging seizures...
May 15, 2017: Clinical Neuropathology
https://www.readbyqxmd.com/read/28501554/molecular-typing-of-clostridium-difficile-isolates-cultured-from-patient-stool-samples-and-gastroenterological-medical-devices-in-a-single-iranian-hospital
#10
Masoumeh Azimirad, Marcela Krutova, Otakar Nyc, Zahra Hasani, Leili Afrisham, Masoud Alebouyeh, Mohammad Reza Zali
This study aimed to characterize Clostridium difficile isolates cultured from stool samples of patients with C. difficile infection (CDI) and swabs from a medical environment in a gastroenterology centre in Tehran, Iran. A total of 158 samples (105 stool samples from hospitalized patients and 53 swabs from medical devices and the environment) were collected from January 2011 to August 2011 and investigated for the presence of C. difficile by direct anaerobic culture on a selective media for C. difficile. C...
May 10, 2017: Anaerobe
https://www.readbyqxmd.com/read/28500775/vaccines-against-malaria-still-a-long-way-to-go
#11
REVIEW
Kai Matuschewski
Several species of Plasmodium cause a broad spectrum of human disease that range from nausea and fever to severe anemia, cerebral malaria, and multi-organ failure. In malaria-endemic countries continuous exposure to Plasmodium sporozoite inoculations and subsequent blood infections elicit only partial and short-lived immunity, which gradually develops over many years of parasite exposure and multiple clinical episodes. The ambitious goal of malaria vaccinology over the past 70 years has been to develop an immunization strategy that mounts protection superior to naturally acquired immunity...
May 13, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28493930/clinical-laboratory-reference-values-amongst-children-aged-4-weeks-to-17-months-in-kilifi-kenya-a-cross-sectional-observational-study
#12
Jesse Gitaka, Caroline Ogwang, Moses Ngari, Pauline Akoo, Ally Olotu, Christine Kerubo, Greg Fegan, Patricia Njuguna, Godfrey Nyakaya, Tuda Otieno, Gabriel Mwambingu, Ken Awuondo, Brett Lowe, Roma Chilengi, James A Berkley
Reference intervals for clinical laboratory parameters are important for assessing eligibility, toxicity grading and management of adverse events in clinical trials. Nonetheless, haematological and biochemical parameters used for clinical trials in sub-Saharan Africa are typically derived from industrialized countries, or from WHO references that are not region-specific. We set out to establish community reference values for haematological and biochemical parameters amongst children aged 4 weeks to 17 months in Kilifi, Kenya...
2017: PloS One
https://www.readbyqxmd.com/read/28486640/generalized-metabolic-bone-disease-and-fracture-risk-in-rothmund-thomson-syndrome
#13
Felicia Cao, Linchao Lu, Steven A Abrams, Keli M Hawthorne, Allison Tam, Weidong Jin, Brian Dawson, Roman Shypailo, Hao Liu, Brendan Lee, Sandesh Cs Nagamani, Lisa L Wang
Rothmund-Thomson syndrome (RTS) is a rare autosomal recessive disorder characterized by poikiloderma, small stature, sparse hair, skeletal abnormalities, increased risk of osteosarcoma, and decreased bone mass. To date, there has not been a comprehensive evaluation of the prevalence and extent of metabolic bone disease in RTS. Furthermore, the mechanisms that result in this phenotype are largely unknown. In this report, we provide a detailed evaluation of 29 individuals with RTS with respect to their metabolic bone status including bone mineral density, calcium kinetics studies, and markers of bone remodeling...
May 9, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28484940/erp-evidence-for-the-control-of-emotional-memories-during-strategic-retrieval
#14
Jane E Herron
Neural evidence for the strategic retrieval of task-relevant 'target' memories at the expense of less relevant 'nontarget' memories has been demonstrated across a wide variety of studies. In ERP studies, this evidence consists of the ERP correlate of recollection (i.e. the 'left parietal old/new effect') being evident for targets and attenuated for nontargets. It is not yet known, however, whether this degree of strategic control can be extended to emotionally valenced words, or whether these items instead reactivate associated memories...
May 8, 2017: Cognitive, Affective & Behavioral Neuroscience
https://www.readbyqxmd.com/read/28483679/sensitive-and-non-invasive-assessment-of-hepatocellular-iron-using-a-novel-room-temperature-susceptometer
#15
Johannes Mueller, Hanna Raisi, Vanessa Rausch, Teresa Peccerella, David Simons, Christian Ziener, Heinz-Peter Schlemmer, Helmut Karl Seitz, Nina Waldburger, Thomas Longerich, Beate Katharina Straub, Sebastian Mueller
PURPOSE: Liver iron accumulates in various chronic liver diseases where it is an independent factor of survival and cancerogenesis. We here tested a novel room-temperature susceptometer (RTS) to noninvasively assess liver iron concentration (LIC). MATERIALS AND METHODS: 264 patients with or without signs of iron overload or liver disease were prospectively enrolled. 35 patients underwent liver biopsy with semiquantitative iron determination (Prussian Blue staining), atomic absorption spectroscopy (AAS, n=33) or MRI (n=15)...
May 5, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28482749/the-assessment-of-emotional-clarity-via-response-times-to-emotion-items-shedding-light-on-the-response-process-and-its-relation-to-emotion-regulation-strategies
#16
Charlotte Arndt, Tanja Lischetzke, Claudia Crayen, Michael Eid
Researchers have begun to use response times (RTs) to emotion items as an indirect measure of emotional clarity. Our first aim was to scrutinise the properties of this RT measure in more detail than previously. To be able to provide recommendations as to whether (and how) emotional intensity - as a possible confound - should be controlled for, we investigated the specific form of the relation between emotional intensity and RTs to emotion items. In particular, we assumed an inverted U-shaped relation at the item level...
May 9, 2017: Cognition & Emotion
https://www.readbyqxmd.com/read/28479068/analysis-of-catecholamines-in-urine-by-unique-lc-ms-suitable-ion-pairing-chromatography
#17
Marianne L Bergmann, Seyed Sadjadi, Anne Schmedes
The catecholamines, epinephrine (E) and norepinephrine (NE) are small polar, hydrophilic molecules, posing significant challenges to liquid chromatography - tandem mass spectrometry (LC-MS/MS) method development. Specifically, these compounds show little retention on conventional reversed-phase liquid chromatography columns. This work presents development and validation of an LC-MS/MS method for determining catecholamines in urine, based on a new approach to ion-pairing chromatography (IPC), in which the ion-pairing reagent (IPR), 1-Heptane Sulfonic Acid (HSA), is added to the extracted samples instead of the mobile phases...
July 1, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28470856/defining-health-research-for-development-the-perspective-of-stakeholders-from-an-international-health-research-partnership-in-ghana-and-tanzania
#18
Claire Leonie Ward, David Shaw, Evelyn Anane-Sarpong, Osman Sankoh, Marcel Tanner, Bernice Elger
OBJECTIVES: The study uses a qualitative empirical method to define Health Research for Development. This project explores the perspectives of stakeholders in an international health research partnership operating in Ghana and Tanzania. METHODS: We conducted 52 key informant interviews with major stakeholders in an international multicenter partnership between GlaxoSmithKline (GSK, Vaccine Developer) and the global health nonprofit organisation PATH and its Malaria Vaccine Initiative program (PATH/MVI, Funder-Development Partner), (RTS, S) (NCT00866619)...
May 3, 2017: Developing World Bioethics
https://www.readbyqxmd.com/read/28465003/the-modified-rapid-emergency-medicine-score-a-novel-trauma-triage-tool-to-predict-in-hospital-mortality
#19
Ross T Miller, Niaman Nazir, Tracy McDonald, Chad M Cannon
BACKGROUND: Trauma systems currently rely on imperfect and subjective tools to prioritize responses and resources, thus there is a critical need to develop a more accurate trauma severity score. Our objective was to modify the Rapid Emergency Medicine (REMS) Score for the trauma population and test its accuracy as a predictor of in-hospital mortality when compared to other currently used scores, including the Revised Trauma Score (RTS), the Injury Severity Score (ISS), the "Mechanism, Glasgow Coma Scale, Age and Arterial Pressure" (MGAP) score, and the Shock Index (SI) score...
April 25, 2017: Injury
https://www.readbyqxmd.com/read/28464937/seasonal-vaccination-against-malaria-a-potential-use-for-an-imperfect-malaria-vaccine
#20
REVIEW
Brian Greenwood, Alassane Dicko, Issaka Sagara, Issaka Zongo, Halidou Tinto, Matthew Cairns, Irene Kuepfer, Paul Milligan, Jean-Bosco Ouedraogo, Ogobara Doumbo, Daniel Chandramohan
In many parts of the African Sahel and sub-Sahel, where malaria remains a major cause of mortality and morbidity, transmission of the infection is highly seasonal. Seasonal malaria chemoprevention (SMC), which involves administration of a full course of malaria treatment to young children at monthly intervals during the high transmission season, is proving to be an effective malaria control measure in these areas. However, SMC does not provide complete protection and it is demanding to deliver for both families and healthcare givers...
May 2, 2017: Malaria Journal
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