Temporal Dissection of Stimulus-Driven and Task-Driven Processes during Perceptual Decision about 3D SFM Stimuli

International audienceAnalyzing the visual properties of a stimulus, such as its shape or its motion, involves a temporally con-strained cascade of processes including sensory integration, attentional selection and perceptual decision. In natural condi-tions, these processing stages may temporally overlap. In this study, we used a time constrained paradigm designed to segre-gate these stages, and recorded MEG activity to characterize their cortical correlates. The experimental sequence comprised a structure-from-motion (SFM) target flanked by pre and post masks, which limited the stimulus-driven processes in time. The MEG responses were recorded in three perceptual tasks bearing on the presence or absence of the target SFM stimulus, on its direction of motion or on its 3D shape. Subjects' responses were delayed to the end of the trials us-ing a random stimulus-response mapping. The analysis of the evoked magnetic fields reveals temporal-ly non-overlapping responses for stimulus-driven and task-related processes. Source reconstruction reveals that the occipital, dorsal and ventral stimulus-related areas follow different temporal pro-files, The response in IPS slowly rising after the beginning of the activity in the lateral occipital cortex and falling back to the baseline prior the delayed motor response, may reflect accumulating evidence on the presented stimulus leading to a motor response, in line with the results from single cell studies in monkey LIP [1]

Safety of Oral Paracetamol – Analysis of Data from a Spontaneous Reporting System in Poland

Purpose: To determine the safety of oral coated paracetamol tablets 500 mg and oral suspension 120 mg/5 mL produced by Hasco-Lek Poland.Methods: We analyzed sales volume and data obtained from the  monitoring of spontaneous reports on the adverse effects of paracetamol collected in the period between November 2000 and June 2012.Results: A total of 45,694 units of coated paracetamol tablets (500 mg) and 6,048,289 units of paracetamol oral suspension (120 mg/5 mL) were marketed during that period. There were 4 spontaneous reports of adverse effects.Conclusion: Oral paracetamol is a safe medication rarely causing adverse effects but it is possible that the existing spontaneous monitoring system for adverse effects in Poland is not sensitive enough to detect all adverse effects, and needs improvement.Keywords: Adverse reaction, NSAIDs, Pharmacovigillance,  Pharmoepidemiolog

High Levels of Sediment Contamination Have Little Influence on Estuarine Beach Fish Communities

While contaminants are predicted to have measurable impacts on fish assemblages, studies have rarely assessed this potential in the context of natural variability in physico-chemical conditions within and between estuaries. We investigated links between the distribution of sediment contamination (metals and PAHs), physico-chemical variables (pH, salinity, temperature, turbidity) and beach fish assemblages in estuarine environments. Fish communities were sampled using a beach seine within the inner and outer zones of six estuaries that were either heavily modified or relatively unmodified by urbanization and industrial activity. All sampling was replicated over two years with two periods sampled each year. Shannon diversity, biomass and abundance were all significantly higher in the inner zone of estuaries while fish were larger on average in the outer zone. Strong differences in community composition were also detected between the inner and outer zones. Few differences were detected between fish assemblages in heavily modified versus relatively unmodified estuaries despite high concentrations of sediment contaminants in the inner zones of modified estuaries that exceeded recognized sediment quality guidelines. Trends in species distributions, community composition, abundance, Shannon diversity, and average fish weight were strongly correlated to physico-chemical variables and showed a weaker relationship to sediment metal contamination. Sediment PAH concentrations were not significantly related to the fish assemblage. These findings suggest that variation in some physico-chemical factors (salinity, temperature, pH) or variables that co-vary with these factors (e.g., wave activity or grain size) have a much greater influence on this fish assemblage than anthropogenic stressors such as contamination

Manifest Onlife czyli o kondycji ludzkiej w dobie cyfrowej i wynikających z niej imperatywach

Tlumaczenia Manfestu Onlife, ktore ukazalo sie na archiwalnej dzis stronie Komisji Europejskiej :https://f.hypotheses.org/wp-content/blogs.dir/4130/files/2019/06/manifestonlife_tradpl.pd

Wikipedia open co-operation or open conflict? / Wikipedia- otwarta współpraca czy otwarty konflikt?

8th June at 5 pm for invitation PhD Wioletty Miskiewicz (visiting professor of University of Warsaw/ CNRS) Dariusz Jemielniak gived a lecture based on his book (Common Knowledge - Ethnography of Wikipedia) titled: Wikipedia - open co-operation or open conflict? How animosites and dispute are creating the biggest world ecyclopaedias. Monday 8th of June 2015 UW Main Campus, Old Library, auditorium. 26/28 Nowy Świat Street, Warsaw Dariusz Jemielniak is Professor of Management at Kozminski Univ..