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H N Alexander Logemann, Koen B E Böcker, Peter K H Deschamps, Peter N van Harten, Jeroen Koning, Chantal Kemner, Zsófia Logemann-Molnár, J Leon Kenemans
RATIONALE: The dopaminergic system has been implicated in visuospatial attention and inhibition, but the exact role has yet to be elucidated. Scarce literature suggests that attenuation of dopaminergic neurotransmission negatively affects attentional focusing and inhibition. To the best of our knowledge, this is the first study that evaluated the effect of dopaminergic antagonism on stopping performance. METHODS: Dopaminergic neurotransmission was attenuated in 28 healthy male participants by using 2 mg haloperidol...
October 17, 2016: Psychopharmacology
Steven G Kohama, Lauren Renner, Noelle Landauer, Alison R Weiss, Henryk F Urbanski, Byung Park, Mary Lou Voytko, Martha Neuringer
: Studies of the effect of hormone therapy on cognitive function in menopausal women have been equivocal, in part due to differences in the type and timing of hormone treatment. Here we cognitively tested aged female rhesus macaques on (1) the delayed response task of spatial working memory, (2) a visuospatial attention task that measured spatially and temporally cued reaction times, and (3) a simple reaction time task as a control for motor speed. After task acquisition, animals were ovariectomized (OVX)...
October 5, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Celia M Smuts, Jennifer N Mills, Tibor Gaál
BACKGROUND: Lactate dehydrogenase (LDH) activity is often measured in human effusions to help in differentiating between transudates and exudates. Few studies have been performed using effusion samples from animals. OBJECTIVES: The purpose of the study was to determine whether LDH can be used to differentiate between transudative and exudative effusions in dogs and cats (including postmortem samples), and whether there is a difference between different laboratory methods of LDH measurement...
October 4, 2016: Veterinary Clinical Pathology
Charles E Gaudet, Lisa L Weyandt
OBJECTIVE: Computerized neuropsychological assessment of concussion has rapidly expanded and Immediate Post-Concussion and Cognitive Testing (ImPACT) is among the most commonly used measures in this domain. ImPACT was primarily developed for use with athletic populations but continues to expand beyond athletics to settings such as the workplace and schools where motivational dispositions may vary. The purpose of the present study was to conduct a systematic review of existing research investigating the prevalence of invalid baseline results and the effectiveness of ImPACT's embedded invalidity indicators in detecting suspect effort...
August 10, 2016: Clinical Neuropsychologist
Kelly Y An, Kristen Kaploun, Laszlo A Erdodi, Christopher A Abeare
OBJECTIVE: This study compared failure rates on performance validity tests (PVTs) across liberal and conservative cutoffs in a sample of undergraduate students participating in academic research. METHOD: Participants (n = 120) were administered four free-standing PVTs (Test of Memory Malingering, Word Memory Test, Rey 15-Item Test, Hiscock Forced-Choice Procedure) and three embedded PVTs (Digit Span, letter and category fluency). Participants also reported their perceived level of effort during testing...
August 10, 2016: Clinical Neuropsychologist
Laszlo A Erdodi, Chantalle L Pelletier, Robert M Roth
Elevations on certain Conners' CPT-II scales are known to be associated with invalid responding. However, scales and cutoffs vary across studies. In addition, the methodology behind developing performance validity tests (PVTs) has been challenged for mistaking true impairment for noncredible presentation. Using ability-based tests as a PVT makes clinicians especially vulnerable to this criticism. The present study examined the ability of CPT-II to dissociate effort from impairment in 47 adults clinically referred for neuropsychological assessment...
September 23, 2016: Applied Neuropsychology. Adult
J Liu, Z J Liao, Q Zhang
Objective: To evaluate the clinical efficacy and safety of external use of recombinant human granulocyte-macrophage colony-stimulating factor (rhGM-CSF) gel on deep partial-thickness burn wounds. Methods: Sixty-eight hospitals in our country including our unit performed a phase Ⅳ clinical trial for rhGM-CSF gel in patients (conforming to the study criteria) with deep partial-thickness burn wounds from November 2010 to July 2012. Multicenter, randomized, positive-homogenous-controlled, and open trial method was used in the trial, and patients from 10 hospitals were grouped into the positive-homogenous-controlled trial, while patients from the other 58 hospitals were grouped into open trial...
September 20, 2016: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
Antonina Luca, Carmela Calandra, Maria Luca
Objective. To discuss the link between glycogen synthase kinase-3 (GSK3) and the main biological alterations demonstrated in bipolar disorder (BD), with special attention to the redox status and the evidence supporting the efficacy of lithium (a GSK3 inhibitor) in the treatment of BD. Methods. A literature research on the discussed topics, using Pubmed and Google Scholar, has been conducted. Moreover, a manual selection of interesting references from the identified articles has been performed. Results. The main biological alterations of BD, pertaining to inflammation, oxidative stress, membrane ion channels, and circadian system, seem to be intertwined...
2016: Oxidative Medicine and Cellular Longevity
Archana Sarkar, Gitau Mburu, Poonam Varma Shivkumar, Pankhuri Sharma, Fiona Campbell, Jagannath Behera, Ritu Dargan, Surendra Kumar Mishra, Sunil Mehra
INTRODUCTION: HIV self-testing can increase coverage of essential HIV services. This study aimed to establish the acceptability, concordance and feasibility of supervised HIV self-testing among pregnant women in rural India. METHODS: A cross-sectional, mixed methods study was conducted among 202 consenting pregnant women in a rural Indian hospital between August 2014 and January 2015. Participants were provided with instructions on how to self-test using OraQuick(®) HIV antibody test, and subsequently asked to self-test under supervision of a community health worker...
2016: Journal of the International AIDS Society
David M Barry, Mark L Ettenhofer
OBJECTIVE: In addition to manual (i.e., "button press") metrics, oculomotor metrics demonstrate considerable promise as tools for detecting invalid responding in neurocognitive assessment. This study was conducted to evaluate saccadic and manual metrics from a computerized continuous performance test as embedded indices of performance validity. METHOD: Receiver operating characteristic analyses, logistic regressions, and ANOVAs were performed to evaluate saccadic and manual metrics in classification of healthy adults instructed to feign deficits ("Fake Bad" group; n = 24), healthy adults instructed to perform their best ("Best Effort" group; n = 26), and adults with a history of mild traumatic brain injury (TBI) who passed a series of validity indices ("mTBI-Pass" group; n = 19)...
September 13, 2016: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
Eben S Schwartz, Laszlo Erdodi, Nicholas Rodriguez, Jyotsna J Ghosh, Joshua R Curtain, Laura A Flashman, Robert M Roth
OBJECTIVES: The Forced Choice Recognition (FCR) trial of the California Verbal Learning Test, 2nd edition, was designed as an embedded performance validity test (PVT). To our knowledge, this is the first systematic review of classification accuracy against reference PVTs. METHODS: Results from peer-reviewed studies with FCR data published since 2002 encompassing a variety of clinical, research, and forensic samples were summarized, including 37 studies with FCR failure rates (N=7575) and 17 with concordance rates with established PVTs (N=4432)...
September 2016: Journal of the International Neuropsychological Society: JINS
Menglan Zhou, Qiwen Yang, Timothy Kudinha, Li Zhang, Meng Xiao, Fanrong Kong, Yupei Zhao, Ying-Chun Xu
There are challenges in viridans group streptococci (VGS) identification especially for the mitis group. Few studies have investigated the performance of MALDI-TOF MS system in VGS identification. Using 16S rRNA gene and gyrB gene sequencing as a gold standard, the performance of two MALDI-TOF MS instruments in the identification of 181 VGS clinical isolates was studied. The Bruker Biotyper and Vitek MS IVD systems correctly identified 88.4% and 98.9% of the 181 isolates, respectively. The Vitek MS RUO system was the least reliable, only correctly identifying 38...
2016: Frontiers in Microbiology
W Beauvais, M Orynbayev, J Guitian
Estimation of farm prevalence is common in veterinary research. Typically, not all animals within the farm are sampled, and imperfect tests are used. Often, assumptions about herd sizes and sampling proportions are made, which may be invalid in smallholder settings. We propose an alternative method for estimating farm prevalence in the context of Brucella seroprevalence estimation in an endemic region of Kazakhstan. We collected 210 milk samples from Otar district, with a population of about 1000 cattle and 16 000 small ruminants, and tested them using an indirect ELISA...
September 9, 2016: Epidemiology and Infection
Kabita Chatterjee, Shamsuz Zaman, Rahul Chaurasia, Surinder Singh, Shawn D Keil, Shalini Tewari, Akanksha Bisht, Nitin Agarwal, Diptiranjan Rout, Subhash Chand, Kallol Saha
BACKGROUND AND OBJECTIVES: This study was conducted to assess the efficacy of Mirasol pathogen reduction system for platelets aimed at preventing bacterial regrowth by spiking buffy coat pooled platelets (BCPP) with clinically relevant load of Staphylococous epidermidis. MATERIALS AND METHODS: BCPP units were prepared using Teruflex BP-kit with Imugard III-S-PL (Terumo BCT, Tokyo, Japan). Two BCPP units were pooled, of which 40 ml of negative control (NC) was removed...
July 2016: Asian Journal of Transfusion Science
B Ian Hutchins, Xin Yuan, James M Anderson, George M Santangelo
Despite their recognized limitations, bibliometric assessments of scientific productivity have been widely adopted. We describe here an improved method to quantify the influence of a research article by making novel use of its co-citation network to field-normalize the number of citations it has received. Article citation rates are divided by an expected citation rate that is derived from performance of articles in the same field and benchmarked to a peer comparison group. The resulting Relative Citation Ratio is article level and field independent and provides an alternative to the invalid practice of using journal impact factors to identify influential papers...
September 2016: PLoS Biology
Huiling Liu, Huiyan Jiang, Ruiping Zheng
We propose a novel feature selection algorithm for liver tissue pathological image classification. To improve the efficiency of feature selection, the same feature values of positive and negative samples are removed in rough selection. To obtain the optimal feature subset, a new heuristic search algorithm, which is called Maximum Minimum Backward Selection (MMBS), is proposed in precise selection. MMBS search strategy has the following advantages. (1) For the deficiency of Discernibility of Feature Subsets (DFS) evaluation criteria, which makes the class of small samples invalid for unbalanced samples, the Weighted Discernibility of Feature Subsets (WDFS) evaluation criteria are proposed as the evaluation strategy of MMBS, which is also available for unbalanced samples...
2016: Computational and Mathematical Methods in Medicine
Nicolette M Munsters, Carlijn van den Boomen, Ignace T C Hooge, Chantal Kemner
Gaze direction is an important social communication tool. Global and local visual information are known to play specific roles in processing socially relevant information from a face. The current study investigated whether global visual information has a primary role during gaze-cued orienting of attention and, as such, may influence quality of interaction. Adults performed a gaze-cueing task in which a centrally presented face cued (valid or invalid) the location of a peripheral target through a gaze shift...
2016: PloS One
Flavio A Cadegiani, Claudio E Kater
BACKGROUND: The term "adrenal fatigue" ("AF") has been used by some doctors, healthcare providers, and the general media to describe an alleged condition caused by chronic exposure to stressful situations. Despite this, "AF" has not been recognized by any Endocrinology society, who claim there is no hard evidence for the existence. The aim of this systematic review is to verify whether there is substantiation for "AF". METHODS: A systematic search was performed at PUBMED, MEDLINE (Ebsco) and Cochrane databases, from the beginning of the data until April 22nd, 2016...
2016: BMC Endocrine Disorders
Min Yang, Wen Zhang, Xiaojun Wu, Dongtao Wei, Yixin Zhao, Gang Zhao, Xu Han, Shunli Zhang
For the analysis of interior geometry and property changes of a large-sized analog model during a loading or other medium (water or oil) injection process with a non-destructive way, a consecutive X-ray computed tomography (XCT) short-scan method is developed to realize an in-situ tomography imaging. With this method, the X-ray tube and detector rotate 270° around the center of the guide rail synchronously by switching positive and negative directions alternately on the way of translation until all the needed cross-sectional slices are obtained...
2016: PloS One
Pascasie L Dombert, Anna Kuhns, Paola Mengotti, Gereon R Fink, Simone Vossel
Humans flexibly attend to features or locations and these processes are influenced by the probability of sensory events. We combined computational modelling of response times with fMRI to compare the functional correlates of (re-)orienting, and the modulation by probabilistic inference in spatial and feature-based attention systems. Twenty-four volunteers performed two task versions with spatial or colour cues. Percentage of cue validity changed unpredictably. A hierarchical Bayesian model was used to derive trial-wise estimates of probability-dependent attention, entering the fMRI analysis as parametric regressors...
August 11, 2016: NeuroImage
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