Download or read book Why Have Cortical Layers What Is the Function of Layering Do Neurons in Cortex Integrate Information Across Different Layers written by Kathleen Rockland and published by Frontiers Media SA. This book was released on 2018-12-21 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Why Have Cortical Layers What Is the Function of Layering Do Neurons in Cortex Integrate Information Across Different Layers written by and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research topic was suggested by Robert Sachdev to bring together a series of articles dealing with the laminar organization of the neocortex. By convention, there are six cortical layers but this number may vary throughout the cerebral cortex of a given species or between species: many regions lack one or more layers, whereas in other regions there are more than six layers. The laminar location of cortical neurons --their cell bodies-- is determined during development. However, neurons are more than their cell bodies; they also have dendrites that may span within a given layer (intralaminar neurons) or across a variety of layers (translaminar neurons). For example, layer V pyramidal neurons have dendrites that span the entire cortical depth, whereas layer III pyramidal neurons have dendrites that span across layers I to IV. Some GABAergic interneurons have dendrites located within a cortical layer (e.g., neurogliaform cells), whereas the dendrites of other interneurons span several layers (e.g., bitufted cells). For neurons having dendrites that cross laminar boundaries, one might ask, why segregate their cell bodies so carefully into lamina? Among many other obvious questions: What is the evidence for or against integration of information across laminae for neurons whose dendrites span several layers? A traditional view is that activity flows through cortical layers in a feed-forward manner, going from layer IV, to layers II and III and onwards. Another view is that cortical layers can have distinct inputs that activate them, triggering spikes. Can processing sequences be state dependent? Furthermore, different cortical layers have distinct transcriptomic profiles, neurochemical attributes, connectivity patterns, number and types of synapses and many other structural attributes. Thus, based on anatomy, or physiology or imaging: What is the function of each cortical layer? What do the different layers do?
Download or read book Micro Meso and Macro Dynamics of the Brain written by György Buzsáki and published by Springer. This book was released on 2016-05-02 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together leading investigators who represent various aspects of brain dynamics with the goal of presenting state-of-the-art current progress and address future developments. The individual chapters cover several fascinating facets of contemporary neuroscience from elementary computation of neurons, mesoscopic network oscillations, internally generated assembly sequences in the service of cognition, large-scale neuronal interactions within and across systems, the impact of sleep on cognition, memory, motor-sensory integration, spatial navigation, large-scale computation and consciousness. Each of these topics require appropriate levels of analyses with sufficiently high temporal and spatial resolution of neuronal activity in both local and global networks, supplemented by models and theories to explain how different levels of brain dynamics interact with each other and how the failure of such interactions results in neurologic and mental disease. While such complex questions cannot be answered exhaustively by a dozen or so chapters, this volume offers a nice synthesis of current thinking and work-in-progress on micro-, meso- and macro- dynamics of the brain.
Download or read book Cortical Development written by Ryoichiro Kageyama and published by Springer Science & Business Media. This book was released on 2013-09-30 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews recent progress in cortical development research, focusing on the mechanisms of neural stem cell regulation, neuronal diversity and connectivity formation, and neocortical organization. Development of the cerebral cortex, the center for higher brain functions such as cognition, memory, and decision making, is one of the major targets of current research. The cerebral cortex is divided into many areas, including motor, sensory, and visual cortices, each of which consists of six layers containing a variety of neurons with different activities and connections. As this book explains, such diversity in neuronal types and connections is generated at various levels. First, neural stem cells change their competency over time, giving sequential rise to distinct types of neurons and glial cells: initially deep layer neurons, then superficial layer neurons, and lastly astrocytes. The activities and connections of neurons are further modulated via interactions with other brain regions, such as the thalamocortical circuit, and via input from the environment. This book on cortical development is essential reading for students, postdocs, and neurobiologists.
Download or read book Encyclopedia of Perception written by E. Bruce Goldstein and published by SAGE. This book was released on 2010 with total page 1281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the ease with which we perceive, many people see perception as something that "just happens." However, even seemingly simple perceptual experiences involve complex underlying mechanisms, which are often hidden from our conscious experience. These mechanisms are being investigated by researchers and theorists in fields such as psychology, cognitive science, neuroscience, computer science, and philosophy. A few examples of the questions posed by these investigations are, What do infants perceive? How does perception develop? What do perceptual disorders reveal about normal functioning? How can information from one sense, such as hearing, be affected by information from another sense, such as vision? How is the information from all of our senses combined to result in our perception of a coherent environment? What are some practical outcomes of basic research in perception? These are just a few of the questions this encyclopedia will consider, as it presents a comprehensive overview of the field of perception for students, researchers, and professionals in psychology, the cognitive sciences, neuroscience, and related medical disciplines such as neurology and ophthalmology.
Download or read book Discovering the Brain written by National Academy of Sciences and published by National Academies Press. This book was released on 1992-01-01 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: The brain ... There is no other part of the human anatomy that is so intriguing. How does it develop and function and why does it sometimes, tragically, degenerate? The answers are complex. In Discovering the Brain, science writer Sandra Ackerman cuts through the complexity to bring this vital topic to the public. The 1990s were declared the "Decade of the Brain" by former President Bush, and the neuroscience community responded with a host of new investigations and conferences. Discovering the Brain is based on the Institute of Medicine conference, Decade of the Brain: Frontiers in Neuroscience and Brain Research. Discovering the Brain is a "field guide" to the brainâ€"an easy-to-read discussion of the brain's physical structure and where functions such as language and music appreciation lie. Ackerman examines: How electrical and chemical signals are conveyed in the brain. The mechanisms by which we see, hear, think, and pay attentionâ€"and how a "gut feeling" actually originates in the brain. Learning and memory retention, including parallels to computer memory and what they might tell us about our own mental capacity. Development of the brain throughout the life span, with a look at the aging brain. Ackerman provides an enlightening chapter on the connection between the brain's physical condition and various mental disorders and notes what progress can realistically be made toward the prevention and treatment of stroke and other ailments. Finally, she explores the potential for major advances during the "Decade of the Brain," with a look at medical imaging techniquesâ€"what various technologies can and cannot tell usâ€"and how the public and private sectors can contribute to continued advances in neuroscience. This highly readable volume will provide the public and policymakersâ€"and many scientists as wellâ€"with a helpful guide to understanding the many discoveries that are sure to be announced throughout the "Decade of the Brain."
Download or read book The Mouse Nervous System written by Charles Watson and published by Academic Press. This book was released on 2011-11-28 with total page 815 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Mouse Nervous System provides a comprehensive account of the central nervous system of the mouse. The book is aimed at molecular biologists who need a book that introduces them to the anatomy of the mouse brain and spinal cord, but also takes them into the relevant details of development and organization of the area they have chosen to study. The Mouse Nervous System offers a wealth of new information for experienced anatomists who work on mice. The book serves as a valuable resource for researchers and graduate students in neuroscience. Systematic consideration of the anatomy and connections of all regions of the brain and spinal cord by the authors of the most cited rodent brain atlases A major section (12 chapters) on functional systems related to motor control, sensation, and behavioral and emotional states A detailed analysis of gene expression during development of the forebrain by Luis Puelles, the leading researcher in this area Full coverage of the role of gene expression during development and the new field of genetic neuroanatomy using site-specific recombinases Examples of the use of mouse models in the study of neurological illness
Download or read book Membrane Potential Imaging in the Nervous System written by Marco Canepari and published by Springer Science & Business Media. This book was released on 2010-10-19 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is structured in five sections, each containing several chapters written by experts and major contributors to particular topics. The volume starts with a historical perspective and fundamental principles of membrane potential imaging and continues to cover the measurement of membrane potential signals from dendrites and axons of individual neurons, measurements of the activity of many neurons with single cell resolution, monitoring of population signals from the nervous system, and concludes with the overview of new approaches to voltage-imaging. The book is targeted at all scientists interested in this mature but also rapidly expanding imaging approach.
Download or read book Connectivity and Integrative Properties of Layer 5 Neurons in the Mouse Visual Cortex written by Alessandro Roberto Galloni and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A central question in neuroscience is how expectations shape sensory processing. In the cerebral cortex, feedforward connections convey sensory information, while feedback connections are thought to be crucial for directing attention, signaling contextual information, and enabling perceptual inference. Thick-tufted layer 5 (ttL5) pyramidal neurons play an important role in integrating sensory, internal, and motor information. They have large complex morphologies that receive thousands of synaptic inputs from across the brain, and express a diverse set of active conductances which support highly nonlinear dendritic computations. Their axons also form the largest output pathway from the cerebral cortex, making them ideally positioned to integrate and summarise cortical computations to drive behaviour. In this thesis, I perform whole-cell patch clamp recordings to characterize the intrinsic properties of a population of ttL5 neurons in the medial secondary visual cortex (V2m) of mice, genetically labelled in the Glt25d2-Cre line. These neurons are found to form a homogeneous population with integrative properties that are broadly consistent with several known features of ttL5 neurons. The inputs to Glt25d2-Cre neurons in V2m are found to originate in several brain regions, associated with both sensory and internal representations. Using optogenetics and spatially patterned optical stimulation, I map the spatial distributions of synapses from these regions on the dendritic trees of the ttL5 neurons. These inputs target distinct dendritic domains in a pattern that argues against classical notions of hierarchical connectivity. By electrically stimulating the largest input populations, I show that these pathways display synaptic facilitation and sum linearly across a wide range of temporal intervals. Furthermore, I find that Ca(2+)-mediated supralinearities, such as backpropagation-activated spike bursts, which have been extensively described in primary visual and somatosensory cortex, are absent in V2m neurons. Finally, through a combination of electrophysiological recordings, morphological reconstructions, and computational modelling, I show that dendritic excitability in ttL5 neurons is modulated by apical trunk length. In summary, I thoroughly describe the properties of a new ttL5-specific mouse line and provide new evidence that ttL5 neuron properties and canonical notions of hierarchical connectivity are not universally applicable throughout the cortex.
Download or read book Augmentation of Brain Function Facts Fiction and Controversy written by Ioan Opris and published by Frontiers Media SA. This book was released on 2018-09-14 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Volume II is entitled “Neurostimulation and pharmacological approaches”. This volume describes augmentation approaches, where improvements in brain functions are achieved by modulation of brain circuits with electrical or optical stimulation, or pharmacological agents. Activation of brain circuits with electrical currents is a conventional approach that includes such methods as (i) intracortical microstimulation (ICMS), (ii) transcranial direct current stimulation (tDCS), and (iii) transcranial magnetic stimulation (TMS). tDCS and TMS are often regarded as noninvasive methods. Yet, they may induce long-lasting plastic changes in the brain. This is why some authors consider the term “noninvasive” misleading when used to describe these and other techniques, such as stimulation with transcranial lasers. The volume further discusses the potential of neurostimulation as a research tool in the studies of perception, cognition and behavior. Additionally, a notion is expressed that brain augmentation with stimulation cannot be described as a net zero sum proposition, where brain resources are reallocated in such a way that gains in one function are balanced by costs elsewhere. In recent years, optogenetic methods have received an increased attention, and several articles in Volume II cover different aspects of this technique. While new optogenetic methods are being developed, the classical electrical stimulation has already been utilized in many clinically relevant applications, like the vestibular implant and tactile neuroprosthesis that utilizes ICMS. As a peculiar usage of neurostimulation and pharmacological methods, Volume II includes several articles on augmented memory. Memory prostheses are a popular recent development in the stimulation-based BMIs. For example, in a hippocampal memory prosthesis, memory content is extracted from hippocampal activity using a multiple-input, multiple-output non-linear dynamical model. As to the pharmacological approaches to augmenting memory and cognition, the pros and cons of using nootropic drugs are discussed.
Download or read book Cellular Migration and Formation of Neuronal Connections written by and published by Academic Press. This book was released on 2013-05-06 with total page 1081 pages. Available in PDF, EPUB and Kindle. Book excerpt: The genetic, molecular, and cellular mechanisms of neural development are essential for understanding evolution and disorders of neural systems. Recent advances in genetic, molecular, and cell biological methods have generated a massive increase in new information, but there is a paucity of comprehensive and up-to-date syntheses, references, and historical perspectives on this important subject. The Comprehensive Developmental Neuroscience series is designed to fill this gap, offering the most thorough coverage of this field on the market today and addressing all aspects of how the nervous system and its components develop. Particular attention is paid to the effects of abnormal development and on new psychiatric/neurological treatments being developed based on our increased understanding of developmental mechanisms. Each volume in the series consists of review style articles that average 15-20pp and feature numerous illustrations and full references. Volume 2 offers 56 high level articles devoted mainly to Formation of Axons and Dendrites, Migration, Synaptogenesis, Developmental Sequences in the Maturation of Intrinsic and Synapse Driven Patterns. Series offers 144 articles for 2904 full color pages addressing ways in which the nervous system and its components develop Features leading experts in various subfields as Section Editors and article Authors All articles peer reviewed by Section Editors to ensure accuracy, thoroughness, and scholarship Volume 2 sections include coverage of mechanisms which regulate: the formation of axons and dendrites, cell migration, synapse formation and maintenance during development, and neural activity, from cell-intrinsic maturation to early correlated patterns of activity
Download or read book Cortex Statistics and Geometry of Neuronal Connectivity written by Valentino Braitenberg and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: By means of quantitative analysis of the tissue components in the cortex of the mouse, this book presents an overall picture of the cortical network which is then related to various theories on cortical function. Centering around the idea of a diffuse network in a fairly homogeneous population of excitatory neurons, that of the pyramidal cells, it shows that the whole organisation in the cortical skeleton of pryramidal cells corresponds well with the idea of an associative memory and with the theory of cell assemblies. Provides the reader with information on quantitative neuroanatomy and also on the methods used, in particular those that vary from the norm.
Download or read book The Human Brain and Spinal Cord written by Lennart Heimer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was written to serve both as a guide for the dissection of the human brain and as an illustrated compendium of the functional anatomy of the brain and spinal cord. In this sense, the book represents an updated and expanded version of the book The Human Brain and Spinal Cord written by the author and published in Swedish by Scandinavian University Books in 1961. The complicated anatomy of the brain can often be more easily appreciated and understood in relation to its development. Some insight about the coverings of the brain will also make the brain dissections more meaningful. Introductory chapters on these subjects constitute Part I of the book. Part 2 is composed of the dissection guide, in which text and illustrations are juxtaposed as much as possible in order to facilitate the use of the book in the dissection room. The method of dissection is similar to dissection proce dures used in many medical schools throughout the world, and variations of the technique have been published by several authors including Ivar Broman in the "Manniskohjarnan" (The Human Brain) published by Gleerups F6rlag, Lund, 1926, and Laszlo Komaromy in "Dissection of the Brain," published by Akademiai Kiado, Budapest, 1947. The great popularity of the CT scanner justifies an extra laboratory session for the comparison of nearly horizontal brain sections with matching CT scans.
Download or read book The Mindful Brain written by Gerald M. Edelman and published by MIT Press. This book was released on 1982-03-30 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: A proposal by two eminent biological scientists for a mechanism whereby mind becomes manifest from the operations of brain tissue. This significant contribution to neuroscience consists of two papers, the first by Mountcastle an, the second by Edelman. Between them, they examine from different but complementary directions the relationships that connect the higher brain—memory, learning, perception, thinking—with what goes on at the most basic levels of neural activity, with particular stress on the role of local neuronal circuits.Edelman's major hypothesis is that "the conscious state results from phasic reentrant signaling occurring in parallel processes that involve associations between stored patterns and current sensory or internal input." This selective process occurs by the polling of degenerate primary repertoires of neuronal groups that are formed during embryogenesis and development. Edelman's theory extrapolates to the brain the selectionistic immunological theories for which he was awarded the 1972 Nobel Prize in Physiology or Medicine. Mountcastle's paper reviews what is known about the actual structure of various parts of the neo cortex. He relates the large entities of the neocortex to their component modules—the local neuronal circuits—and shows how the complex interrelationships of such a distributed system can yield dynamic distributed functioning. There are strong conceptual parallels between Mountcastle's idea of cortical columns and their functional subunits and Edelman's concept of populations of neurons functioning as processors in a brain system based on selectional rather than instructional principles. These parallels are traced and put into perspective in Francis Schmitt's Introduction.
Download or read book Brain Mechanisms for the Integration of Posture and Movement written by and published by Elsevier. This book was released on 2003-10-30 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brain Mechanisms for the Integration of Posture and Movement
Download or read book Comparative Vertebrate Neuroanatomy written by Ann B. Butler and published by John Wiley & Sons. This book was released on 2005-09-02 with total page 739 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comparative Vertebrate Neuroanatomy Evolution and Adaptation Second Edition Ann B. Butler and William Hodos The Second Edition of this landmark text presents a broad survey of comparative vertebrate neuroanatomy at the introductory level, representing a unique contribution to the field of evolutionary neurobiology. It has been extensively revised and updated, with substantially improved figures and diagrams that are used generously throughout the text. Through analysis of the variation in brain structure and function between major groups of vertebrates, readers can gain insight into the evolutionary history of the nervous system. The text is divided into three sections: * Introduction to evolution and variation, including a survey of cell structure, embryological development, and anatomical organization of the central nervous system; phylogeny and diversity of brain structures; and an overview of various theories of brain evolution * Systematic, comprehensive survey of comparative neuroanatomy across all major groups of vertebrates * Overview of vertebrate brain evolution, which integrates the complete text, highlights diversity and common themes, broadens perspective by a comparison with brain structure and evolution of invertebrate brains, and considers recent data and theories of the evolutionary origin of the brain in the earliest vertebrates, including a recently proposed model of the origin of the brain in the earliest vertebrates that has received strong support from newly discovered fossil evidence Ample material drawn from the latest research has been integrated into the text and highlighted in special feature boxes, including recent views on homology, cranial nerve organization and evolution, the relatively large and elaborate brains of birds in correlation with their complex cognitive abilities, and the current debate on forebrain evolution across reptiles, birds, and mammals. Comparative Vertebrate Neuroanatomy is geared to upper-level undergraduate and graduate students in neuroanatomy, but anyone interested in the anatomy of the nervous system and how it corresponds to the way that animals function in the world will find this text fascinating.
Download or read book Psychiatric Advanced Practice Nursing written by Eris F Perese and published by F.A. Davis. This book was released on 2012-01-05 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here’s an evidence-based, holistic approach to caring for psychiatric and mental health patients in outpatient settings. Using a biopsychosocial model, this text addresses mental health issues through stabilization of brain chemistry, individualized psychotherapy, and re-socialization into the community. Inside, you’ll find an in-depth focus on specific psychiatric disorders including the epidemiology, etiology, biological basis, clinical presentation of adults, older adults, and children, co-morbidities, differential diagnosis, and treatment. There is also comprehensive coverage of the interventions and “Levers of Change” used to aid patients in their recovery, as well preventative interventions.
