Download or read book Neuronal Correlates of Selective Attention written by Daniel Senkowski and published by . This book was released on 2004 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Neuropsychology of Mental Illness written by Stephen J. Wood and published by Cambridge University Press. This book was released on 2009-10 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes neuropsychological approaches to the investigation, description, measurement and management of a wide range of mental illnesses.

Download or read book Visual Attention and Cortical Circuits written by Jochen Braun and published by MIT Press. This book was released on 2001 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: An attempt to derive a comprehensive theory of attention from both neurobiological and psychological data.

Download or read book An Investigation of the Neural Correlates of Selective Attention Using Functional Imaging in Humans written by Geraint Ellis Rees and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of the Neural Correlates of Selective Attention in Humans Using Functional Imaging written by Geraint Rees and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of the Neural Correlates of Selective Attention in Humans Using Functional Imaging written by and published by . This book was released on 2000 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Merging of the Senses written by Barry E. Stein and published by MIT Press. This book was released on 1993-01-22 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together neural, perceptual, and behavioral studies, The Merging of the Senses provides the first detailed review of how the brain assembles information from different sensory systems in order to produce a coherent view of the external world. Stein and Meredith marshall evidence from a broad array of species to show that interactions among senses are the most ancient scheme of sensory organization, an integrative system reflecting a general plan that supersedes structure and species. Most importantly, they explore what is known about the neural processes by which interactions among the senses take place at the level of the single cell.The authors draw on their own experiments to illustrate how sensory inputs converge (from visual, auditory, and somatosensory modalities, for instance) on individual neurons in different areas of the brain, how these neurons integrate their inputs, the principles by which this integration occurs, and what this may mean for perception and behavior. Neurons in the superior colliculus and cortex are emphasized as models of multiple sensory integrators.

Download or read book Electrophysiological Correlates of Object based Selective Attention written by Marla Raye Zinni and published by . This book was released on 2010 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: A visual stimulus may be selectively attended on the basis of its location in space, a specific feature, or as a whole object. While a relatively large amount of research has examined the neural basis of location-based and feature-based attentional selection, few studies have examined the neural correlates of the spread of attention from one feature of an object to another, reflecting the selection of an object as an "integrated feature ensemble" (Schoenfeld et al., 2003; O'Craven, Downing, & Kanwisher, 1999). The research in this dissertation examined the electrophysiological correlates of the spread of selective attention to a task-irrelevant color feature of an object using the event-related potential (ERP) brain imaging technique. The temporal dynamics of this spread of attention were examined for two classes of objects, grouped-arrays of lines (Study 1) and geometric shapes (Study 2). In each study, overlapping objects were presented and the participants' task was to sustain attention to one object versus another to judge a change in the thickness of one of the lines of the grid (Study 1) or a change in object shape (Study 2). On some trials, either the attended object or the unattended object was colored, and color was irrelevant to the task. Difference ERPs indicated that color was first encoded in the visual cortex by 100 ms. However, the effect of attention on the task-irrelevant color feature was evident in later ERP modulations. A bilateral parietal/occipital positivity beginning at 200 ms (Study 2) and a midline occipital negativity beginning at 280 ms (Studies 1 & 2) were associated with the selection of the irrelevant color of the attended object. Source localization analyses suggested that the neural generators of the attention-related facilitation of the irrelevant color feature were situated in ventral occipital cortical regions near color-selective cortical areas. These data provide further evidence for the "integrated competition" model (Duncan, 1996; 1997), which posits that the neural basis for the perceptual integration of an attended object consists of enhanced activity in the network of specialized modules that encode its individual features, including those that are not relevant to the immediate task.

Download or read book Selective Information Processing in the Visual Brain written by Giedrius T. Buračas and published by . This book was released on 1996 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neural Correlates of Selective Attention in Cognitively Normal Older Adults Patients with Mild Cognitive Impairment and Patients with Mild Alzheimer s Disease written by Bing Ye and published by . This book was released on 2010 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is well established that people experience a decline in cognitive functions, such as selective attention (SA), as they get older. SA is the ability to focus on task-relevant information and suppress task-irrelevant information. The Stroop task has been used to assess SA. In the current study, the neural correlates of SA were investigated using functional MRI-Stroop task with cognitively normal older adults (NC), patients with amnestic Mild Cognitive Impairment (aMCI) and patients with mild Alzheimer's disease (AD). The current study reanalyzed previous master student's data, due to the disagreement in analyzing the data. In the fMRI data analysis, the contrast of correct responses in the naming incongruent color (SC) condition minus correct responses in the reading incongruent word (RW) condition (SC-RW) in series 2a and 2b was reanalyzed using an event-related analysis. The current Stroop experiment was in a block design with four series: series 0, series 1, series 2a and 2b. In behavioral analysis, the performance of the word-reading task was expected to be significantly better than the color-naming task in series 1, series 2a and 2b because the belief that reading incongruent color word was always an easier task than the color-naming task. The results from behavioral analysis showed that significant more errors were made in reading incongruent color words in series 2a and 2b than in series 1. In the functional MRI data analysis, although brain activation associated with inhibition was expected in the contrast of SC-RW of series 2a & 2b, the results did not show any brain activation. The unexpected results could be due to the RSE that was elicited by the task switching paradigm of series 2a and 2b. The results suggest that the current Stroop task adapted from the Stroop Neuropsychological Screening Test may not yield a Stroop interference effect of sufficient magnitude to be detected with fMRI in the contrast of SC-RW of series 2a and 2b.

Download or read book Attention and consciousness in different senses written by Naotsugu Tsuchiya and published by Frontiers E-books. This book was released on 2013-06-03 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although often used in everyday speech and in the scholarly literature, “selective attention” and “consciousness” lack clear, undisputed definitions. Partly because of this deficit there exists a lively debate on the relationship between the two. Nevertheless, attention has been studied scientifically for a long time, because a variety of tasks allow researchers to control several of its aspects (e.g. focused and feature-based attention). Consciousness as a scientific subject of study has emerged more recently, but is now rapidly gaining traction. Scientific studies of consciousness concern the state or level of consciousness (e.g., awake as opposed to in coma, dreamless sleep or under anaesthesia) as well as the contents of consciousness or the phenomenology of perception. With the increase in consciousness-focused research, there is a concomitant surge in research examining the relationship between attention and consciousness. This relationship between attention and consciousness is the topic of this Research Topic. Contributions related to or focused solely on attention or on consciousness will not be considered. It had long been assumed that attention and consciousness are inextricably intertwined: two sides of the same coin. However, recently substantial evidence has emerged that attention and consciousness are interacting, but separable processes. It is however debated how tight the interactions are, and what the exact nature of the relationship is. Therefore, we invite researchers from different “camps” to provide opinionated but balanced literature reviews. Different groups will interpret the same data in different ways. We feel that combining these views in one Research Topic is immensely valuable to researchers from different fields. Apart from reviews we also invite potential contributors to provide new and exciting evidence in the form of original contributions that may support any of the different views. Even though attention and consciousness are critical aspects of many different cognitive processes, they are mainly studied (though not exclusively) in the domain of visual perception. In other sensory modalities, e.g. olfaction or audition, it is currently not clear whether distinctions between attention and consciousness exist, which is even more true for other cognitive processes such as memory. Therefore, we specifically invite contributions covering the auditory, somatosensory, olfactory, and memory domain. We ask all contributors to provide discussions on the relationship between attention and consciousness, and focus on (1) the influence of attention on sensory processing; (2) the formation of conscious perception, (3) the evidence for unconscious processing and its modulation by attention; (4) potential indications for dissociations between attention and consciousness (e.g. does paying attention to a stimulus decrease performance on e.g. a discrimination task?); (5) neuroimaging and neurophysiology data pertaining to these questions. Often, one is caught in one’s own research field and lacks the time or the knowledge to delve into another field. This Research Topic should provide a great overview in great breadth of the current state of knowledge on the links between attention and consciousness, and their interactions, in several different sensory modalities.

Download or read book The Oxford Handbook of Attention written by Kia Nobre and published by Oxford University Press. This book was released on 2018 with total page 1260 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the last three decades, there have been enormous advances in our understanding of the neural mechanisms of selective attention at the network as well as the cellular level. The Oxford Handbook of Attention brings together the different research areas that constitute contemporary attention research into one comprehensive and authoritative volume. In 40 chapters, it covers the most important aspects of attention research from the areas of cognitive psychology, neuropsychology, human and animal neuroscience, computational modelling, and philosophy. The book is divided into 4 main sections. Following an introduction from Michael Posner, the books starts by looking at theoretical models of attention. The next two sections are dedicated to spatial attention and non-spatial attention respectively. Within section 4, the authors consider the interactions between attention and other psychological domains. The last two sections focus on attention-related disorders, and finally, on computational models of attention. Aimed at both scholars and students, the Oxford Handbook of Attention provides a concise and state-of-the-art review of the current literature in this field.

Download or read book Artificial Neural Networks ICANN 2009 written by Cesare Alippi and published by Springer Science & Business Media. This book was released on 2009-09-03 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two volume set LNCS 5768 and LNCS 5769 constitutes the refereed proceedings of the 19th International Conference on Artificial Neural Networks, ICANN 2009, held in Limassol, Cyprus, in September 2009. The 200 revised full papers presented were carefully reviewed and selected from more than 300 submissions. The first volume is divided in topical sections on learning algorithms; computational neuroscience; hardware implementations and embedded systems; self organization; intelligent control and adaptive systems; neural and hybrid architectures; support vector machine; and recurrent neural network.

Download or read book Attention and Performance IV written by Sylvan Kornblum and published by . This book was released on 1973 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cognitive Neuroscience of Attention written by Michael I. Posner and published by Guilford Press. This book was released on 2012-01-01 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative reference provides a comprehensive examination of the nature and functions of attention and its relationship to broader cognitive processes. The editor and contributors are leading experts who review the breadth of current knowledge, including behavioral, neuroimaging, cellular, and genetic studies, as well as developmental and clinical research. Chapters are brief yet substantive, offering clear presentations of cutting-edge concepts, methods, and findings. The book addresses the role of attention deficits in psychological disorders and normal aging and considers the implications for intervention and prevention. It includes 85 illustrations. New to This Edition *Significant updates and many new chapters reflecting major advances in the field. *Important breakthroughs in neuroimaging and cognitive modeling. *Chapters on the development of emotion regulation and temperament. *Expanded section on disorders, including up-to-date coverage of ADHD as well as chapters on psychopathy and autism. *Chapters on cognitive training and rehabilitation.

Download or read book Attention Filtering of Visual Information by Prefrontal Cortex Neural Ensembles written by Sebastien Tremblay and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Selective attention is the cognitive process by which processing resources are preferentially attributed to behaviourally relevant sensory stimulations. Single electrode studies in the macaque monkey brain have identified the single neuron correlates of this selection process within both sensory and higher-order associative areas. However, the neural ensemble correlates of this cognitive process remain poorly documented. In this doctoral thesis, I have studied the neural ensemble correlates of visual attention within the primate lateral prefrontal cortex using multielectrode recording techniques.First, I have employed computational tools borrowed from the field of machine learning to extract the attentional information contained in the spiking activity of prefrontal neural ensembles. I was able to predict the focus of attention from this activity on a single-trial basis, indicating that this region could drive the attentional selection process within behaviourally relevant timeframes. Second, I have compared the spiking activity of the neural ensembles to the local field potential activity, which is composed of low frequency voltage oscillations within the extracellular space. I found that attention could be decoded in a frequency-dependent manner from these signals. Moreover, I found evidence that high-frequency gamma oscillations are mostly reflecting spiking activity.Finally, by combining the previous approach with a pharmacological intervention, I have found that methylphenidate, the most widely prescribed drug to treat attention deficit disorders, reduces inter-neuronal interactions that are detrimental to information coding. I have also shown that this network effect of the drug leads to improved coding of attentional signals by prefrontal cortex neural ensembles.Overall, these results will help further our basic understanding of the neural mechanisms by which the prefrontal cortex supports attentional functions in the primate brain. In addition, it should illuminate new clinical research avenues aimed at designing better treatments for children and adults with attention deficit disorders." --

Download or read book The Neural Substrate of Selective Attention written by Anne-Marie Shelley and published by . This book was released on 1991 with total page 946 pages. Available in PDF, EPUB and Kindle. Book excerpt: