1,720,999 research outputs found
Listening in on consciousness. Discriminating states of consciousness with responses to periodic auditory and texture stimulation
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207526.pdf (Publisher’s version ) (Open Access)Radboud University, 30 september 2019Promotor : Celikel, T. Co-promotores : Englitz, B., Binder, M.194 p
Cortical Representation of Touch: from Whole Cell Recordings to Network Simulations in silico
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157019.pdf (Publisher’s version ) (Open Access)“What does a sensory neuron in the brain know about the world” is one of the most fundamental questions in systems neurosciences. Using single cell electrophysiological recordings, neural network simulations (after having reconstructed the somatosensory cortical columns in silico) and information theory calculations, we show that the sensory information is transferred from one locus to another with high fidelity even though there is a significant amount of information loss when a single neuron converts the information it received (i.e. the information in PSPs) to the information it transmits (i.e. the information in spikes). Furthermore, different sub-circuits in the somatosensory neural network carry different but complementary information about the sensory feature space, thus could differentially contribute to the sensory processing depending on which behavior task the animal is currently engaging. Our results could potentially be used to guide the development of new prosthetic devices.
“Wat weet een sensorische neuron in het brein over de buitenwereld?” is één van de meest fundamentele vragen binnen de neurobiologie. Doormiddel van elektrofysiologische celmetingen, computersimulaties van breinnetwerken en wiskundige berekeningen tonen we aan dat neuronen in de somatosensorische cortex met hoge betrouwbaarheid informatie kunnen doorgeven van de ene naar de andere breinregio, ondanks dat er tijdens dit proces een groot deel van de sensorische informatie verloren gaat. Bovendien bevinden zich afzonderlijke sub-circuits in het breinnetwerk van de somatosensorische cortex, die elk een ander deel van de verwerking van de sensorische informatie voor hun rekening nemen en elkaar zodoende aanvullen. Afhankelijk van het gedrag dat het dier vertoont kunnen deze sub-circuits op verschillende wijzen bijdragen aan de informatieverwerking. Onze bevindingen kunnen worden toegepast om de ontwikkeling van nieuwe protheses te bevorderen.RU Radboud Universiteit, 26 april 2016Promotor : Celikel, T. Co-promotor : Englitz, B.222 p
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Decreased beta power and OFC-STN phase synchronization during reactive stopping in freely behaving rats
No full textItem does not contain fulltextThis collection contains raw LFP data, video data, and behavioral data belonging to Ter Horst et al. (2024), of which the abstract can be found below. The collection also includes code to clean the unprocessed LFP data, as well as code to run the task itself, and example code for analyzing the video data.Ter Horst, J., Boillot, M., Cohen, M. X., & Englitz. B. (2024). Decreased beta power and OFC-STN phase synchronization during reactive stopping in freely behaving rats. The Journal of Neuroscience, 44, 1-13. doi:10.1523/JNEUROSCI.0463-24.2024During natural behavior, an action often needs to be suddenly stopped in response to an unexpected sensory input—referred to as reactive stopping. Reactive stopping has been mostly investigated in humans, which led to hypotheses about the involvement of different brain structures, in particular the hyperdirect pathway. Here, we directly investigate the contribution and interaction of two key regions of the hyperdirect pathway, the orbitofrontal cortex (OFC) and subthalamic nucleus (STN), using dual-area, multielectrode recordings in male rats performing a stop-signal task. In this task, rats have to initiate movement to a go-signal, and occasionally stop their movement to the go-signal side after a stop-signal, presented at various stop-signal delays. Both the OFCand STN show near-simultaneous field potential reductions in the beta frequency range (12–30 Hz) compared with the period preceding the go-signal and the movement period. These transient reductions (∼200 ms) only happen during reactive stopping, which is when the stop-signal was received after action initiation, and are well timed after stop-signal onset and before the estimated time of stopping. Phase synchronization analysis also showed a transient attenuation of synchronization between the OFC and STN in the beta range during reactive stopping. The present results provide the first direct quantification of local neural oscillatory activity in the OFC and STN and interareal synchronization specifically timed during reactive stopping
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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