Evoked Electrical Activity in the Auditory Nervous System PDF Download

Author: Ralph F. Naunton
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 616

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Book Description

Author: E. Colon
Publisher: Springer Science & Business Media
ISBN: 9400920598
Category : Medical
Languages : en
Pages : 524

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Book Description
Evoked potentials are potentials that are derived from the peripheral or central nervous system. They are time locked with an external stimulus and can be influenced by subjective intentions. Evoked potentials have become increasingly popular for clinical diagnosis over the last few years. Evoked potentials from the visual system are used by ophthalmologists in order to localize the abnormalities in the visual pathway. The otologists are mainly involved in brainstem auditory evoked potentials, while the pediatricians, neonatologists, neurologists and clinical neurophysiologists make use of multimodal stimulation. The psychiatrists and psychologists, generally, examine the slow potentials such as P300 and CNV. Anesthesiologists use short latency somatosensory and visual evoked potentials in order to monitor the effectiveness of the anesthesia. Pharmaco evoked potentials are very promising measures for the quan tification of the effectiveness of drug action on the cerebral cortex. Urologists are more and more involved in pudendal somatosensory evoked potentials and in the intensive care unit evoked potentials are used in order to monitor the functional state of the central nervous system of the patient. This overwhelming number of examinations and exam ina tors clearly demonstrates the need for guidelines and standardization of the methods used. The evoked potential metholody is restricted by the relative poor signal to noise ratio. In many diseases this signal to noise ratio decrease rapidly during the progression of the illness. Optimal technical equipment and methodology are therefore essential.

Author: John T. Jacobson
Publisher: Taylor & Francis Group
ISBN: 9780850665048
Category : Audiometry
Languages : en
Pages : 482

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Author: Gastone G. Celesia
Publisher: Elsevier Health Sciences
ISBN: 0702055654
Category : Medical
Languages : en
Pages : 491

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Author: Mary Agnes Burniston Brazier
Publisher:
ISBN: 9780272791868
Category : Electric conductivity
Languages : en
Pages : 350

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Book Description

Author: Mary Agnes Burniston Brazier
Publisher:
ISBN:
Category : Medical
Languages : en
Pages : 264

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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: Mary Agnes Burniston Brazier
Publisher:
ISBN:
Category : Electrophysiology
Languages : en
Pages : 310

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Book Description

Author: Robert D. Stevens
Publisher: Cambridge University Press
ISBN: 1107434424
Category : Medical
Languages : en
Pages : 457

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Book Description
Brain dysfunction is a major clinical problem in intensive care, with potentially debilitating long-term consequences for post-ICU patients of any age. The resulting extended length of stay in the ICU and post-discharge cognitive dysfunction are now recognized as major healthcare burdens. This comprehensive clinical text provides intensivists and neurologists with a practical review of the pathophysiology of brain dysfunction and a thorough account of the diagnostic and therapeutic options available. Initial sections review the epidemiology, outcomes, relevant behavioral neurology and biological mechanisms of brain dysfunction. Subsequent sections evaluate the available diagnostic options and preventative and therapeutic interventions, with a final section on clinical encephalopathy syndromes encountered in the ICU. Each chapter is rich in illustrations, with an executive summary and a helpful glossary of terms. Brain Disorders in Critical Illness is a seminal reference for all physicians and neuroscientists interested in the care and outcome of severely ill patients.

Author: Harunori Ohmori
Publisher: Springer Nature
ISBN: 9813297131
Category : Medical
Languages : en
Pages : 152

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Book Description
This book explains neural function at the level of ion channels and membrane excitability in neurons along the ascending auditory pathway. Airborne sound information is captured by the ears, transformed to neural electrical signals, and then processed in the brain. Readers will find full descriptions of these processes of signal transduction and transformation. First, it is described how, at the level of hair cells, the receptor cells in the cochlea, the sound-evoked vibration is transduced to electrical signals and transmitted to the auditory nerve fibers. In the second section it is explained how the electrical activity of these fibers is processed at the cochlear nucleus in order to extract the temporal and level information of sound separately and then transmitted to the third nucleus for processing of the interaural differences, such as the interaural time difference and the interaural level difference. The third section summarizes the transformation of auditory temporal information to the rate of neural firing activity in the midbrain and the higher nuclei, including the cortex, based on in vivo results. Finally, emerging new technologies to investigate auditory signal processing are reviewed and discussed.