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https://www.readbyqxmd.com/read/28925539/expression-and-functional-proteomic-analyses-of-osteocytes-from-xenopus-laevis-tested-under-mechanical-stress-conditions-preliminary-observations-on-an-appropriate-new-animal-model
#1
Jessika Bertacchini, Marta Benincasa, Marta Checchi, Francesco Cavani, Alberto Smargiassi, Marzia Ferretti, Carla Palumbo
Hitherto, the role of the osteocyte as transducer of mechanical stimuli into biological signals is far from settled. In this study, we used an appropriate model represented by the cortex of Xenopus laevis long bone diaphysis lacking (unlike the mammalian one) of vascular structures and containing only osteocytes inside the bone matrix. These structural features allow any change of protein profile that might be observed upon different experimental conditions, such as bone adaptation to stress/mechanical loading, to be ascribed specifically to osteocytes...
September 19, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28924609/the-empty-primordial-asteroid-belt
#2
Sean N Raymond, Andre Izidoro
The asteroid belt contains less than a thousandth of Earth's mass and is radially segregated, with S-types dominating the inner belt and C-types the outer belt. It is generally assumed that the belt formed with far more mass and was later strongly depleted. We show that the present-day asteroid belt is consistent with having formed empty, without any planetesimals between Mars and Jupiter's present-day orbits. This is consistent with models in which drifting dust is concentrated into an isolated annulus of terrestrial planetesimals...
September 2017: Science Advances
https://www.readbyqxmd.com/read/28922892/successful-microsurgical-management-of-high-risk-foramen-magnum-dural-arteriovenous-fistula-with-cortical-venous-reflex-using-far-lateral-approach-3-dimensional-operative-video
#3
Amol Raheja, Phil Taussky, William T Couldwell
No abstract text is available yet for this article.
October 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28921527/bumping-heart-and-sweaty-palms-physiological-hyperarousal-as-a-risk-factor-for-child-social-anxiety
#4
Milica Nikolić, Evin Aktar, Susan Bögels, Cristina Colonnesi, Wieke de Vente
BACKGROUND: Physiological hyperarousal in social situations is a characteristic of individuals with social anxiety disorder (SAD), but so far it has been rarely studied as a biological risk for SAD. Here, we investigate whether children at high risk for SAD (because of their parents' SAD) display physiological hyperarousal while interacting with a stranger. Also, we examine whether early physiological hyperarousal is related to later child social anxiety. METHOD: One hundred and seventeen children took part in the stranger-approach task when they were 2...
September 18, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28920772/endogenous-attention-to-object-features-modulates-the-erp-c1-component
#5
Alberto Zani, Alice Mado Proverbio
Converging neuroimaging and electrophysiological evidence supports the notion that selective attention can modulate neural activity not only in V1 (BA17) - as early as 40-60 ms post-stimulus - but also at subcortical level (thalamic lateral geniculate nucleus, LGN). V1 modulation has been documented both in space-based and (especially) object-based selection conditions, most of all in endogenous orienting paradigms. It seems then that an attentional modulation of ERP C1 response - reflecting V1 modulation - would not be especially favoured by exogenous cuing as far as object-based attention is concerned...
September 18, 2017: Cognitive Neuroscience
https://www.readbyqxmd.com/read/28917695/the-impact-of-gabaergic-drugs-on-tms-induced-brain-oscillations-in-human-motor-cortex
#6
Isabella Premoli, Til O Bergmann, Matteo Fecchio, Mario Rosanova, Andrea Biondi, Paolo Belardinelli, Ulf Ziemann
Brain responses to transcranial magnetic stimulation (TMS) as measured with electroencephalography (EEG) have so far been assessed either by TMS-evoked EEG potentials (TEPs), mostly reflecting phase-locked neuronal activity, or time-frequency-representations (TFRs), reflecting oscillatory power arising from a mixture of both evoked (i.e., phase-locked) and induced (i.e., non-phase-locked) responses. Single-pulse TMS of the human primary motor cortex induces a specific pattern of oscillatory changes, characterized by an early (30-200 ms after TMS) synchronization in the α- and β-bands over the stimulated sensorimotor cortex and adjacent lateral frontal cortex, followed by a late (200-400 ms) α- and β-desynchronization over the stimulated and contralateral sensorimotor cortex...
September 13, 2017: NeuroImage
https://www.readbyqxmd.com/read/28917446/amplitude-modulation-rate-dependent-topographic-organization-of-the-auditory-steady-state-response-in-human-auditory-cortex
#7
Nathan Weisz, Chrysoula Lithari
Periodic modulations of an acoustic feature, such as amplitude over a certain frequency range, leads to phase locking of neural responses to the envelope of the modulation. Using electrophysiological methods this neural activity pattern, also called the auditory steady-state response (aSSR), is visible following frequency transformation of the evoked response as a clear spectral peak at the modulation frequency. Despite several studies employing the aSSR that show, for example, strongest responses for ∼40 Hz and an overall right-hemispheric dominance, it has not been investigated so far to what extent within auditory cortex different modulation frequencies elicit aSSRs at a homogenous source or whether the localization of the aSSR is topographically organized in a systematic manner...
September 11, 2017: Hearing Research
https://www.readbyqxmd.com/read/28915140/life-threatening-massive-hemoptysis-after-cryoablation-for-atrial-fibrillation
#8
Vivek Jayaschandran, Amy N Mertens, Vishal K Patel, Bhavinkumar Dalal
A 59-year-old man developed massive hemoptysis, 1 month after undergoing cryoablation procedure for atrial fibrillation. He underwent emergent bronchoscopy that revealed massive, active bleeding with clots requiring repeated suctioning, epinephrine, and cold saline injection. The source of bleeding was identified in a follow-up bronchoscopy performed few days later-a 2×3 cm area of ulceration of the left main stem bronchus which was missed in the initial bronchoscopy owing to blood obscuring the field of vision...
September 14, 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/28914601/left-ventricular-long-axis-function-assessed-with-cardiac-cine-mr-imaging-is-an-independent-predictor-of-all-cause-mortality-in-patients-with-reduced-ejection-fraction-a-multicenter-study
#9
Simone Romano, Robert M Judd, Raymond J Kim, Han W Kim, Igor Klem, John F Heitner, Dipan J Shah, Jennifer Jue, Afshin Farzaneh-Far
Purpose To evaluate the prognostic value of a simple index of left ventricular (LV) long-axis function-lateral mitral annular plane systolic excursion (MAPSE)-in a large multicenter population of patients with reduced ejection fraction (EF) who were undergoing cardiac magnetic resonance (MR) imaging. Materials and Methods This retrospective study included 1040 consecutive patients (mean age, 59.5 years ± 15.8) at four U.S. medical centers who were undergoing cardiac MR imaging for assessment of LV dysfunction with EF less than 50%...
September 14, 2017: Radiology
https://www.readbyqxmd.com/read/28910537/analysis-of-mechanics-of-side-impact-test-defined-in-un-ece-regulation-129
#10
Pawel Baranowski, Krzysztof Damaziak, Lukasz Mazurkiewicz, Jerzy Malachowski, Artur Muszynski, Dario Vangi
OBJECTIVE: This article discusses differences between a side impact procedure described in UN/ECE Regulation 129 and scenarios observed in real world cases. METHODS: Numerical simulations of side impact tests utilizing different boundary conditions are used to compare the severity of the Regulation 129 test and the other tests with different kinematics of child resistant systems (CRS). In the simulations, the authors use a validated finite element (FE) model of real world CRS together with a fully deformable numerical model of the Q3 anthropomorphic test device (ATD) by Humanetics Innovative Solution, Inc...
September 14, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28910413/the-influence-of-the-japanese-waving-cat-on-the-joint-spatial-compatibility-effect-a-replication-and-extension-of-dolk-hommel-prinz-and-liepelt-2013
#11
Lydia Puffe, Kerstin Dittrich, Karl Christoph Klauer
In a joint go/no-go Simon task, each of two participants is to respond to one of two non-spatial stimulus features by means of a spatially lateralized response. Stimulus position varies horizontally and responses are faster and more accurate when response side and stimulus position match (compatible trial) than when they mismatch (incompatible trial), defining the social Simon effect or joint spatial compatibility effect. This effect was originally explained in terms of action/task co-representation, assuming that the co-actor's action is automatically co-represented...
2017: PloS One
https://www.readbyqxmd.com/read/28904758/early-life-foraging-behavioral-responses-of-newly-fledged-albatrosses-to-environmental-conditions
#12
Sophie de Grissac, Frederic Bartumeus, Sam L Cox, Henri Weimerskirch
In order to survive and later recruit into a population, juvenile animals need to acquire resources through the use of innate and/or learnt behaviors in an environment new to them. For far-ranging marine species, such as the wandering albatross Diomedea exulans, this is particularly challenging as individuals need to be able to rapidly adapt and optimize their movement strategies in response to the highly dynamic and heterogeneous nature of their open-ocean pelagic habitats. Critical to this is the development and flexibility of dispersal and exploratory behaviors...
September 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28895116/age-at-reproductive-debut-developmental-predictors-and-consequences-for-lactation-infant-mass-and-subsequent-reproduction-in-rhesus-macaques-macaca-mulatta
#13
Florent Pittet, Crystal Johnson, Katie Hinde
OBJECTIVES: The age at which females initiate their reproductive career is a critical life-history parameter with potential consequences on their residual reproductive value and lifetime fitness. The age at reproductive debut may be intimately tied to the somatic capacity of the mother to rear her young, but relatively little is known about the influence of age of first birth on milk synthesis within a broader framework of reproductive scheduling, infant outcomes, and other life-history tradeoffs...
September 12, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28893329/epidemiology-of-psychotic-depression-systematic-review-and-meta-analysis
#14
E Jääskeläinen, T Juola, H Korpela, H Lehtiniemi, M Nietola, J Korkeila, J Miettunen
Large amount of data have been published on non-psychotic depression (NPD), schizophrenia (SZ), and bipolar disorder, while psychotic depression (PD) as an own entity has received much smaller attention. We performed a systematic review and meta-analyses on epidemiology, especially incidence and prevalence, risk factors, and outcomes of PD. A systematic search to identify potentially relevant studies was conducted using four electronic databases and a manual search. The search identified 1764 unique potentially relevant articles, the final study included 99 articles...
September 12, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28893148/comparative-analyses-of-bicyclists-and-motorcyclists-in-vehicle-collisions-focusing-on-head-impact-responses
#15
Xinghua Wang, Yong Peng, Shengen Yi
To investigate the differences of the head impact responses between bicyclists and motorcyclists in vehicle collisions. A series of vehicle-bicycle and vehicle-motorcycle lateral impact simulations on four vehicle types at seven vehicle speeds (30, 35, 40, 45, 50, 55 and 60 km/h) and three two-wheeler moving speeds (5, 7.5 and 10 km/h for bicycle, 10, 12.5 and 15 km/h for motorcycle) were established based on PC-Crash software. To further comprehensively explore the differences, additional impact scenes with other initial conditions, such as impact angle (0, π/3, 2π/3 and π) and impact position (left, middle and right part of vehicle front-end), also were supplemented...
September 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28888893/face-working-memory-deficits-in-developmental-prosopagnosia-tests-of-encoding-limits-and-updating-processes
#16
Margaret C Jackson, Paul Counter, Jeremy J Tree
Developmental prosopagnosia (DP) is a condition in which individuals experience life-long problems recognising faces. In recent years, unpacking the nature of the impairments of this population has been the focus of numerous studies. One focus has been on the nature of face-based memory impairments for such individuals, with the onus being mainly on long-term memory deficits. Far fewer have considered the nature of face-based working memory (WM) impairments for DP cases, and the current study seeks to address this...
September 6, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28888554/how-to-treat-pancreatic-adenocarcinoma-in-elderly-how-far-can-we-go-in-2017
#17
REVIEW
Marine Gilabert, Jean Luc Raoul, Frederique Rousseau
Pancreatic adenocarcinoma is one of the most fatal cancers that frequently affects older patients. Limited data suggest that older patients are as likely to benefit from surgery, radiation, and chemotherapy as younger patients. The only potentially curative approach for pancreatic cancer is surgery but this is only performed in less than 20% of patients considered resectable. With improvements in surgical techniques, older patients without major comorbidities show a course of disease after resection similar to that of younger patients...
September 6, 2017: Journal of Geriatric Oncology
https://www.readbyqxmd.com/read/28882600/lesson-to-be-remembered-from-a-skull-base-tumor
#18
C Briet, F Bernard, P Rodien
The natural history of giant prolactinomas is not known. While it is commonly accepted that the enlargement of microadenoma is rare and more limited than macroadenoma, it is so far uncommon that macroadenoma progress to giant adenoma. Thus, spontaneous enlargement of adenomas is poorly documented. We report the unusual history of undiagnosed microprolactinoma, revealed 12years later at the stage of a giant adenoma presenting as a skull base tumor. This unique observation provides information on the natural history of giant adenomas and arguments for particular attention to microadenomas with signs of invasion...
September 4, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28871935/topical-imiquimod-is-an-effective-and-safe-drug-for-molluscum-contagiosum-in-children
#19
George Badavanis, Efstathia Pasmatzi, Alexandra Monastirli, Sophia Georgiou, Dionysios Tsambaos
Dear Editor, Molluscum contagiosum (MC) is a very common skin infection caused by a molluscipox virus gene of the poxvirus family. It usually occurs in young children, sexually active adults, and immunocompromised individuals. The typical clinical picture of this infection is characterized by asymptomatic flesh-colored, single or multiple papules, measuring 2-6 mm in diameter with a central umbilication that occur on the skin and the mucous membranes. In adults, the skin lesions are predominantly located in the genital region, whereas in children they are found on the trunk, the extremities, and the face...
July 2017: Acta Dermatovenerologica Croatica: ADC
https://www.readbyqxmd.com/read/28871031/angular-gyrus-involvement-at-encoding-and-retrieval-is-associated-with-durable-but-less-specific-memories
#20
Marieke van der Linden, Ruud M W J Berkers, Richard G M Morris, Guillén Fernández
After consolidation, information belonging to a mental schema is better remembered, but such memory can be less specific when it comes to details. A neuronal mechanism in line with this behavioral pattern could result from a dynamic interaction that entails mediation by a specific cortical network with associated hippocampal disengagement. We now report that in male and female adult human subjects, encoding and later consolidation of a series of objects embedded in a semantic schema was associated with a build-up of activity in the angular gyrus (AG) that predicted memory 24h later...
September 4, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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