Human Auditory Steady-state Response, Electroencephalogram, and Late Auditory Evoked Potentials During General Anesthesia PDF Download
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Author: Gilles Plourde
Publisher:
ISBN:
Category : Anesthesia
Languages : en
Pages : 0
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Book Description
In order to identify neurophysiological correlates of the changes in the level of conciousness associated with general anesthesia, the 40 Hz auditory steady-state response (ASSR), the electroencephalogram (EEG) and the N1 and P3 components of the transient auditory evoked potential were recorded before anesthesia (pre-induction), at the onset of anesthesia (induction), during surgical anesthesia, at the time of emergence and during recovery from anesthesia. The amplitude of the ASSR, was reduced significantly during late induction and dropped below noise levels during surgical anesthesia. It increased during emergence and further increased during recovery although the amplitude during recovery was significantly less than pre-induction values. Total EEG power increased significantly after induction. The EEG median frequency and 95% quantile frequency decreased significantly during surgery and increased significantly during emergence. Muscle artifacts could account for many of the EEG changes. The results for the transient auditory evoked potential indicated that, except during emergence, detection was associated with clear N1 and P3 waves whereas undetection was not. The lack of either N1 and P3 for detection during emergence perhaps occurred because the patients were not yet fully conscious. (Abstract shortened by UMI.).
Author: Gilles Plourde
Publisher:
ISBN:
Category : Anesthesia
Languages : en
Pages : 0
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Book Description
In order to identify neurophysiological correlates of the changes in the level of conciousness associated with general anesthesia, the 40 Hz auditory steady-state response (ASSR), the electroencephalogram (EEG) and the N1 and P3 components of the transient auditory evoked potential were recorded before anesthesia (pre-induction), at the onset of anesthesia (induction), during surgical anesthesia, at the time of emergence and during recovery from anesthesia. The amplitude of the ASSR, was reduced significantly during late induction and dropped below noise levels during surgical anesthesia. It increased during emergence and further increased during recovery although the amplitude during recovery was significantly less than pre-induction values. Total EEG power increased significantly after induction. The EEG median frequency and 95% quantile frequency decreased significantly during surgery and increased significantly during emergence. Muscle artifacts could account for many of the EEG changes. The results for the transient auditory evoked potential indicated that, except during emergence, detection was associated with clear N1 and P3 waves whereas undetection was not. The lack of either N1 and P3 for detection during emergence perhaps occurred because the patients were not yet fully conscious. (Abstract shortened by UMI.).
Author:
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 224
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Book Description
Author: Robert F. Burkard
Publisher: Lippincott Williams & Wilkins
ISBN: 9780781757560
Category : Medical
Languages : en
Pages : 156
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Book Description
Written by experts with extensive clinical and scientific experience, this comprehensive textbook presents the state of the art in auditory evoked potentials. Opening chapters explain the nature of electrical fields that generate surface recorded potentials, summarize the imaging modalities that complement evoked potential studies, and review acoustics and instrumentation. Major sections examine the anatomy and physiology of the auditory periphery, brainstem, and cortex and the principles and clinical applications of auditory, myogenic, visual, somatosensory, and vestibular evoked potentials. Chapters present hands-on laboratory exercises and clinical case studies. A full-color insert includes 3D images from multi-channel evoked potentials and functional imaging.
Author: Helga Kolb
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: Oriano Mecarelli
Publisher: Springer
ISBN: 3030045730
Category : Medical
Languages : en
Pages : 822
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Book Description
This book describes the developments and improvements in electroencephalography (EEG). In recent years, digital technology has replaced analog equipments, and it is now possible to easily record and store EEG tracings and to quickly recall previously acquired material for subsequent analysis. In addition, not only static figures, but also electronic supplementary materials can be included in books, enabling EEGs to be viewed in real-time. In clinical practice, EEG still represents the most important functional examination in the study CNS development and its anatomical and physiological integrity throughout life. In the pathological context, EEG provides indispensable diagnostic information for classification of epileptic syndromes, and it is also valuable in all the other CNS diseases (infectious, cerebrovascular, neurodegenerative, etc). Furthermore, monitoring EEG can be widely used in emergency settings, such as emergency departments or intensive care units. In comatose patients, EEG provides information regarding prognosis and evaluation of the sedative effect of anesthetic drugs. Written by a group of leading national and international experts, it offers a substantial, yet practical, EEG compendium, which serves as a reference resource for physicians and neurodiagnostic technologists as well as physicians-in-training, researchers, practicing electroencephalographers and students.
Author: Alex S. Evers
Publisher: Cambridge University Press
ISBN: 1139497022
Category : Medical
Languages : en
Pages : 2902
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Book Description
In recent years our understanding of molecular mechanisms of drug action and interindividual variability in drug response has grown enormously. Meanwhile, the practice of anesthesiology has expanded to the preoperative environment and numerous locations outside the OR. Anesthetic Pharmacology: Basic Principles and Clinical Practice, 2nd edition, is an outstanding therapeutic resource in anesthesia and critical care: Section 1 introduces the principles of drug action, Section 2 presents the molecular, cellular and integrated physiology of the target organ/functional system and Section 3 reviews the pharmacology and toxicology of anesthetic drugs. The new Section 4, Therapeutics of Clinical Practice, provides integrated and comparative pharmacology and the practical application of drugs in daily clinical practice. Edited by three highly acclaimed academic anesthetic pharmacologists, with contributions from an international team of experts, and illustrated in full colour, this is a sophisticated, user-friendly resource for all practitioners providing care in the perioperative period.
Author: R. Steven Ackley
Publisher: Psychology Press
ISBN: 1351576704
Category : Education
Languages : en
Pages : 504
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Book Description
An Essential Guide to Hearing and Balance Disorders consolidates the most significant clinical aspects of hearing and balance disorders, ranging from cause and diagnosis to treatment and cure. Experts in various subspecialties of this extensive topic introduce readers to the most sophisticated and state of the art methods of diagnosis and treatment. Each chapter expands on a specific topic area along the continuum of how medical personnel diagnose hearing and balance disorders, to how surgical implantation of the cochlea and rehabilitation can remedy various conditions. In concise format, the book begins with a case history and follows with comprehensive descriptions of current knowledge regarding fundamental causes of hearing loss and balance disorders, as well as a thorough examination of objective assessment. The latter half of the volume presents specialized treatment and rehabilitative options for various disorders. The chapters in this part cover special topics and conclude with pertinent case studies. Unique areas of discussion in a text of this kind include: genetics of deafness pediatric hearing loss and hearing loss later in life business essentials in audiology private practice professional issues, such as ethics, methods of practice, and conflicts of interest. As its title implies, this book is critically important for all students and professionals in hearing/balance related disciplines, including audiology, otolaryngology, general medicine, and rehabilitation oriented allied health care occupations.
Author: Rance, Gary
Publisher: Plural Publishing
ISBN: 1597568783
Category : Medical
Languages : en
Pages : 353
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Book Description
Written for auditory clinicians and researchers alike, this is the first monograph on this important area of auditory science that traces the international research effort from its origins in the 1970s to the present day. Comprising contributions from experts in a range of disciplines including auditory physiology, engineering, medicine and audiology, the book presents comprehensive and authoritative coverage of the generation and recording of the ASSR and the clinical applications of the response.
Author: Donald L. Schomer
Publisher: Lippincott Williams & Wilkins
ISBN: 1451153155
Category : Medical
Languages : en
Pages : 1308
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Book Description
The leading reference on electroencephalography since 1982, Niedermeyer's Electroencephalography is now in its thoroughly updated Sixth Edition. An international group of experts provides comprehensive coverage of the neurophysiologic and technical aspects of EEG, evoked potentials, and magnetoencephalography, as well as the clinical applications of these studies in neonates, infants, children, adults, and older adults. This edition's new lead editor, Donald Schomer, MD, has updated the technical information and added a major new chapter on artifacts. Other highlights include complete coverage of EEG in the intensive care unit and new chapters on integrating other recording devices with EEG; transcranial electrical and magnetic stimulation; EEG/TMS in evaluation of cognitive and mood disorders; and sleep in premature infants, children and adolescents, and the elderly. A companion website includes fully searchable text and image bank.
Author: John D. Durrant
Publisher: Plural Publishing
ISBN: 1635501792
Category : Medical
Languages : en
Pages : 505
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Book Description
Basic Concepts of Clinical Electrophysiology in Audiology is a revolutionary textbook, combining the research and expertise of both distinguished experts and up-and-coming voices in the field. By taking a multidisciplinary approach to the subject, the editors of this graduate-level text break down all aspects of electrophysiology to make it accessible to audiology students. In addition to defining the basics of the tools of the trade and their routine uses, the authors also provide ample presentations of new approaches currently undergoing continuing research and development. The goal of this textbook is to give developing audiologists a broad and solid basis of understanding of the methods in common or promising practice. Throughout the text, individual chapters are divided into “episodes,” each examining a facet of the overarching chapter’s topic. With different experts handling each episode, readers are exposed to outstanding professionals in the field. This text singularly stitches together the chapters and their episodes to build from foundational concepts to more complex issues that clinicians are likely to face on their road to full clinical competency. As collections of episodes, the writers and editors thus endeavor to present a series of stories that build throughout the book, in turn allowing readers to build a broader interest in the subject. Key Features * Heads Up sections in each chapter introduce more advanced content to expose readers to what lies beyond the basic level and further enhance the main chapter content and “entertainment value” * Take home messages at the end of each chapter serve to focus the reader’s attention, encourage review, and discourage superficial learning by “just reading the abstract” * More than 450 innovative illustrations use combinations of panels, insets, and/or gray tone to facilitate reader understanding, optimize portrayal of data, and unify concepts across chapters * Numerous case studies and references to practical clinical issues and results are included throughout the book * Keywords are highlighted in-text to improve both attention and retention of critical terms and ease of returning to review them
