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https://www.readbyqxmd.com/read/28449417/iron-and-anemia-in-chronic-kidney-disease-new-treatments-changing-old-paradigms
#1
EDITORIAL
John T Daugirdas
No abstract text is available yet for this article.
June 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28449195/reliable-estimation-of-inhibitory-efficiency-to-anticipate-choose-or-simply-react
#2
Inge Leunissen, Bram B Zandbelt, Zrinka Potocanac, Stephan P Swinnen, James P Coxon
Response inhibition is an important executive process studied by clinical and experimental psychologists, neurophysiologists, and cognitive neuroscientists alike. Stop-signal paradigms are popular because they are grounded in a theory that provides methods to estimate the latency of an unobservable process: the stop-signal reaction time (SSRT). Critically, SSRT estimates can be biased by skew of the response time distribution and gradual slowing over the course of the experiment. Here, we present a series of experiments that directly compare three common stop-signal paradigms that differ in the distribution of response times...
April 27, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28449072/functions-of-galectins-as-self-non-self-recognition-and-effector-factors
#3
Gerardo R Vasta, Chiguang Feng, Nuria González-Montalbán, Justin Mancini, Lishi Yang, Kelsey Abernathy, Graeme Frost, Cheyenne Palm
Carbohydrate structures on the cell surface encode complex information that through specific recognition by carbohydrate-binding proteins (lectins), modulates interactions between cells, cells and the extracellular matrix, or mediates recognition of potential microbial pathogens. Galectins are a family of ß-galactoside-binding lectins, which are evolutionary conserved and have been identified in most organisms, from fungi to invertebrates and vertebrates, including mammals. Since their discovery in the 1970s, their biological roles, initially understood as limited to recognition of endogenous carbohydrate ligands in embryogenesis and development, have expanded in recent years by the discovery of their roles in tissue repair and regulation of immune homeostasis...
April 25, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28448826/generalized-anxiety-disorder-worry-and-attention-to-threat-a-systematic-review
#4
REVIEW
Huw Goodwin, Jenny Yiend, Colette R Hirsch
Among anxious populations, attention has been demonstrated to be preferentially biased to threatening material compared to neutral or other valenced material. Individuals who have high levels of trait worry, such as those with Generalized Anxiety Disorder (GAD), may be biased to threat but research has produced equivocal findings. This review aimed to systematically review the extant experimental literature to establish the current evidence of attentional bias to threat among trait worriers compared to healthy controls and other clinical populations...
March 29, 2017: Clinical Psychology Review
https://www.readbyqxmd.com/read/28448684/statistical-modeling-for-bayesian-extrapolation-of-adult-clinical-trial-information-in-pediatric-drug-evaluation
#5
Margaret Gamalo-Siebers, Jasmina Savic, Cynthia Basu, Xin Zhao, Mathangi Gopalakrishnan, Aijun Gao, Guochen Song, Simin Baygani, Laura Thompson, H Amy Xia, Karen Price, Ram Tiwari, Bradley P Carlin
Children represent a large underserved population of "therapeutic orphans," as an estimated 80% of children are treated off-label. However, pediatric drug development often faces substantial challenges, including economic, logistical, technical, and ethical barriers, among others. Among many efforts trying to remove these barriers, increased recent attention has been paid to extrapolation; that is, the leveraging of available data from adults or older age groups to draw conclusions for the pediatric population...
April 27, 2017: Pharmaceutical Statistics
https://www.readbyqxmd.com/read/28448567/memory-underpinnings-of-future-intentions-would-you-like-to-see-the-sequel
#6
Marta Stragà, Fabio Del Missier, Francesco Marcatto, Donatella Ferrante
In two studies, we investigated the memory underpinnings of future intentions related to past hedonic experiences. Preceding research did not make clear whether the specific memory processes supporting the expression of intentions about the future involve global judgments of the past experience (general affective evaluations formed on-line) or judgments derived from the episodic recollection of the past. Adapting a correlational paradigm previously employed to study future intentions, and applying it to the experience of watching a movie, we comparatively tested the influence of global retrospective evaluations vs...
2017: PloS One
https://www.readbyqxmd.com/read/28448504/impaired-sense-of-agency-in-functional-movement-disorders-an-fmri-study
#7
Fatta B Nahab, Prantik Kundu, Carine Maurer, Qian Shen, Mark Hallett
The sense of agency (SA) is an established framework that refers to our ability to exert and perceive control over our own actions. Having an intact SA provides the basis for the human perception of voluntariness, while impairments in SA are hypothesized to lead to the perception of movements being involuntary that may be seen many neurological or psychiatric disorders. Individuals with functional movement disorders (FMD) experience a lack of control over their movements, yet these movements appear voluntary by physiology...
2017: PloS One
https://www.readbyqxmd.com/read/28448453/working-memory-in-the-prefrontal-cortex
#8
REVIEW
Shintaro Funahashi
The prefrontal cortex participates in a variety of higher cognitive functions. The concept of working memory is now widely used to understand prefrontal functions. Neurophysiological studies have revealed that stimulus-selective delay-period activity is a neural correlate of the mechanism for temporarily maintaining information in working memory processes. The central executive, which is the master component of Baddeley's working memory model and is thought to be a function of the prefrontal cortex, controls the performance of other components by allocating a limited capacity of memory resource to each component based on its demand...
April 27, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28447996/task-interruption-and-resumption-paradigm-for-testing-the-activation-and-pursuit-of-an-abstract-thinking-goal
#9
Jae-Eun Namkoong, Marlone D Henderson
This protocol is based on the task interruption and resumption paradigm, the premise of which is that active goals lead to persistent behavior and thus a higher resumption rate after a period of delay or interruption. The task interruption and resumption protocol described in this research is tailored to test the activation of cognitive goals (e.g., a goal to think more abstractly). Cognitive goals may be pursued even during the interruption period; thus, to prevent this, the protocol involves cognitive distraction...
April 18, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447984/experience-is-instrumental-in-tuning-a-link-between-language-and-cognition-evidence-from-6-to-7-month-old-infants-object-categorization
#10
Danielle R Perszyk, Sandra R Waxman
At birth, infants not only prefer listening to human vocalizations, but also have begun to link these vocalizations to cognition: For infants as young as three months of age, listening to human language supports object categorization, a core cognitive capacity. This precocious link is initially broad: At 3 and 4 months, vocalizations of both humans and nonhuman primates support categorization. But by 6 months, infants have narrowed the link: Only human vocalizations support object categorization. Here we ask what guides infants as they tune their initially broad link to a more precise one, engaged only by the vocalizations of our species...
April 19, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447844/frontal-theta-band-oscillations-predict-error-correction-and-posterror-slowing-in-typing
#11
Çığır Kalfaoğlu, Tom Stafford, Elizabeth Milne
Performance errors are associated with robust behavioral and electroencephalography (EEG) effects. However, there is a debate about the nature of the relationship between these effects and implicit versus explicit error awareness. Our aim was to study the relationship between error related electrophysiological effects, such as spectral perturbations in fronto-medial theta band oscillations (FMT), and error awareness in typing. Typing has an advantage as an experimental paradigm in that detected errors are quickly and habitually signaled by the participant using backspace, allowing separation of detected from undetected errors without interruption in behavior...
April 27, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28447842/cognitive-coupling-during-reading
#12
Caitlin Mills, Art Graesser, Evan F Risko, Sidney K D'Mello
We hypothesize that cognitively engaged readers dynamically adjust their reading times with respect to text complexity (i.e., reading times should increase for difficult sections and decrease for easier ones) and failure to do so should impair comprehension. This hypothesis is consistent with theories of text comprehension but has surprisingly been untested. We tested this hypothesis by analyzing 4 datasets in which participants (N = 484) read expository texts using a self-paced reading paradigm. Participants self-reported mind wandering in response to pseudorandom thought-probes during reading and completed comprehension assessments after reading...
April 27, 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28447841/examining-depletion-theories-under-conditions-of-within-task-transfer
#13
Gene A Brewer, Kevin K H Lau, Kimberly M Wingert, B Hunter Ball, Chris Blais
In everyday life, mental fatigue can be detrimental across many domains including driving, learning, and working. Given the importance of understanding and accounting for the deleterious effects of mental fatigue on behavior, a growing body of literature has studied the role of motivational and executive control processes in mental fatigue. In typical laboratory paradigms, participants complete a task that places demand on these self-control processes and are later given a subsequent task. Generally speaking, decrements to subsequent task performance are taken as evidence that the initial task created mental fatigue through the continued engagement of motivational and executive functions...
April 27, 2017: Journal of Experimental Psychology. General
https://www.readbyqxmd.com/read/28447810/surviving-blind-decomposition-a-distributional-analysis-of-the-time-course-of-complex-word-recognition
#14
Daniel Schmidtke, Kazunaga Matsuki, Victor Kuperman
The current study addresses a discrepancy in the psycholinguistic literature about the chronology of information processing during the visual recognition of morphologically complex words. Form-then-meaning accounts of complex word recognition claim that morphemes are processed as units of form prior to any influence of their meanings, whereas form-and-meaning models posit that recognition of complex word forms involves the simultaneous access of morphological and semantic information. The study reported here addresses this theoretical discrepancy by applying a nonparametric distributional technique of survival analysis (Reingold & Sheridan, 2014) to 2 behavioral measures of complex word processing...
April 27, 2017: Journal of Experimental Psychology. Learning, Memory, and Cognition
https://www.readbyqxmd.com/read/28447615/millions-of-boreal-shield-lakes-can-be-used-to-probe-archaean-ocean-biogeochemistry
#15
S L Schiff, J M Tsuji, L Wu, J J Venkiteswaran, L A Molot, R J Elgood, M J Paterson, J D Neufeld
Life originated in Archaean oceans, almost 4 billion years ago, in the absence of oxygen and the presence of high dissolved iron concentrations. Early Earth oxidation is marked globally by extensive banded iron formations but the contributing processes and timing remain controversial. Very few aquatic habitats have been discovered that match key physico-chemical parameters of the early Archaean Ocean. All previous whole ecosystem Archaean analogue studies have been confined to rare, low sulfur, and permanently stratified lakes...
April 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28447500/young-skilled-deaf-readers-have-an-enhanced-perceptual-span-in-reading
#16
Nathalie N Bélanger, Michelle Lee, Elizabeth R Schotter
Recently, Bélanger, Slattery, Mayberry and Rayner (2012) showed, using the moving window paradigm, that profoundly deaf adults have a wider perceptual span during reading relative to hearing adults matched on reading level. This difference might be related to the fact that deaf adults allocate more visual attention to simple stimuli in the parafovea (Bavelier, Dye & Hauser, 2006). Importantly, this reorganization of visual attention in deaf individuals is already manifesting in deaf children (Dye, Hauser & Bavelier, 2009)...
April 27, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28447447/nuclear-targeting-gold-nanorods-for-extremely-low-nir-activated-photothermal-therapy
#17
Limin Pan, Jianan Liu, Jianlin Shi
Photo-related nanomedicine is of particular interest as an emerging paradigm toward precise cancer therapy, as demonstrated by the recent developments of photothermal therapy (PTT), an emerging technique employing light converting agents to burn cancerous cells by over-dosed optical energy-converted heat. However, most of the laser irradiations needed for effective PTT significantly exceed the maximal permissible power density in human skin, which is likely to damage surrounding normal tissues. Herein, we report a strategy of intranuclear PTT of cancer enabled by nuclear-targeted delivery of gold nanorods of ~ 10...
April 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28447247/the-role-of-peripheral-myelin-protein-2-in-remyelination
#18
Mark Stettner, Jennifer Zenker, Fabian Klingler, Fabian Szepanowski, Hans-P Hartung, Anne K Mausberg, Christoph Kleinschnitz, Roman Chrast, Bernd C Kieseier
The protein component of the myelin layer is essential for all aspects of peripheral nerves, and its deficiency can lead to structural and functional impairment. The presence of peripheral myelin protein 2 (P2, PMP2, FABP8, M-FABP) in Schwann cells has been known for decades and shown recently to be involved in the lipid homeostasis in the peripheral neural system. However, its precise role during de- and remyelination has yet to be elucidated. To this end, we assessed remyelination after sciatic nerve crush injury in vivo, and in an experimental de/remyelination ex vivo myelinating culture model in P2-deficient (P2 (-/-) ) and wild-type (WT) animals...
April 26, 2017: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/28447200/skyline-retention-and-retroactive-interference-in-the-navigating-australian-desert-ant-melophorus-bagoti
#19
Cody A Freas, Christopher Whyte, Ken Cheng
Visual cues commonly aid solitary foraging ants. Specifically, foragers can use the skyline where terrestrial landmarks meet the sky. Foraging ants show a remarkable affinity to retain these terrestrial cues, developing lifelong memories of the nest site panorama. Here we explore foragers' ability to retain skyline cues of resource locations at some distance from the nest through experiments with artificial skylines erected around a resource location. We also tested the foragers' memories of one skyline at several time points after the skyline was replaced by a different one...
April 26, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28447115/human-genetics-as-a-model-for-target-validation-finding-new-therapies-for-diabetes
#20
REVIEW
Soren K Thomsen, Anna L Gloyn
Type 2 diabetes is a global epidemic with major effects on healthcare expenditure and quality of life. Currently available treatments are inadequate for the prevention of comorbidities, yet progress towards new therapies remains slow. A major barrier is the insufficiency of traditional preclinical models for predicting drug efficacy and safety. Human genetics offers a complementary model to assess causal mechanisms for target validation. Genetic perturbations are 'experiments of nature' that provide a uniquely relevant window into the long-term effects of modulating specific targets...
April 26, 2017: Diabetologia
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