Download or read book Investigation Into Steady state Auditory Brainstem Response Detection Weighted Time Averaging and Autoregressive Spectral Estimation written by Tony R. Orsi and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Steady-State Auditory Brainstem Responses (SSABRs) are auditory evoked potentials which provide objective, non-invasive, audiometric information. Unfortunately, test time is too long to warrant clinical use. Thus, the purpose of this thesis is to reduce test time. We determined that the long test time is due to high EEG background noise, idiosyncratic physiological artifacts, the use of Artifact Rejection under noisy recording conditions and periodogram based spectral estimation which suffers from poor resolution. To improve detection, we compared Weighted Time Averaging with Artifact Rejection and a detector using Autoregressive spectral estimation with the Magnitude Squared Coherence (MSC) method (currently the best SSABR detector). Both comparisons used data recorded under quiet and noisy conditions. We found that Weighted Time Averaging performed as well as Artifact Rejection meanwhile reducing recording time by 36% for noisy conditions. Furthermore, the MSC method had 5% greater ROC Area (on average) compared to the Autoregressive based detector.
Download or read book Investigation Into Steady state Auditory Brainstem Response Detection Weighted Time Averaging and Autoregressive Spectral Estimation written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accuracy of 40 Hz Automated and Sinusoidal ASSR and Tone burst ABR Thresholds in Normal hearing Adults Using Kalman weighted Filtering written by Uzma Shaheen Wilson and published by . This book was released on 2015 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Auditory brainstem responses (ABR) and auditory steady state responses (ASSR) are useful for estimating hearing in difficult-to-test populations. For these populations, Kalman-weighted filtering and in-situ pre-amplification can be advantageous for ABR recordings, but little is known about the accuracy of 40-Hz sinusoidal ASSR (sASSR) thresholds using these techniques. The primary aims of this study were to determine the accuracy of: a) 40-Hz sASSR thresholds compared to both toneburst-ABR and behavioral thresholds; and b) automated ASSR (aASSR) in a semi-alert population. Behavioral and electrophysiological thresholds for 500, 2000 and 4000 Hz TB and narrow-band chirp stimuli were obtained using both 2000 and 4000 equivalent sweeps. With 4000 sweeps, significantly better thresholds were obtained for sASSR than TB-ABR for 500 Hz only. With 2000 sweeps, significantly better thresholds were obtained for TB-ABR than for sASSR for 4000 Hz only. 4000 sweep findings demonstrate that 40-Hz sASSR is useful for estimating low-frequency hearing with adequate averaging, whereas 2000 sweep findings suggest sASSR thresholds may be dependent upon response averaging. Multi-frequency screening of aASSR yielded a 61% passing rate using a 20 dB HL stopping level. These findings have clinical applications: a) 40-Hz sASSR may be helpful for low frequency thresholds; b) 40-Hz aASSR multi-frequency screening may be useful, although thresholds should be normed to behavioral thresholds for best results.
Download or read book Feasibility of Assessing Auditory Brainstem Responses to 40 Hz Steady state Stimuli in Schizophrenia Patients written by Ted Farrand and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neurocognitive deficits are among the most disabling features of Schizophrenia (Sz) and substantially contribute to impairments in daily psychosocial functioning. Though antipsychotics have proven successful in treating the positive symptoms of Sz, they haven't been shown to meaningfully impact neurocognition in Sz patients. This gap in care has led researchers to develop a wide range of cognitive remediation strategies. One such strategy, Targeted Cognitive Therapy (TCT), is based on a growing body of evidence showing that impairments in early sensory processing are associated with neurocognitive deficits in Sz. TCT has been studied in Sz patients with promising results, showing statistically significant improvements in the early auditory information processing, word discrimination, and verbal learning and memory. However, there is considerable heterogeneity in the ability of Sz patients to benefit from TCT. To this end, various candidate neurophysiologic biomarkers are under investigation. One promising neurophysiologic measure of auditory system functioning that has not been previously assessed in Sz patients is the auditory brainstem response (ABR). though the ABR is widely used for clinically monitoring and audition screening using purpose built ABR acquisition equipment, the literature surrounding the use of this marker in Sz is sparse and mixed. The aims of this Independent Study Project (ISP) were to 1) assess the feasibility of ABR recording in Sz patients in response to 30-Hz auditory steady-state click stimulation using standard, laboratory grade EEG equipment and 2) to determine whether TCT influenced ABR morphology. ABRs were assessed in 2 groups of Sz patients (n=21 receiving TCT and n=23 Sz receiving treatment as usual, TAU). EEG recordings were collected at baseline, after 1 hr of TCT vs computer games, and after approximately 3 months of TCT or TAU. Grand averages of the recordings were calculated and average peak latencies of Waves I, III, V, and I-V, as well as peak amplitude of Wave V were extracted. Robust ABRs were successfully extracted from 32/44 Sz patients. While no exploratory analysis failed to detect significant TCT vs. TAU treatment effects of Waves I, III, or V latency, I-V interlatency, or Wave V amplitude, the high rate of unusable recordings indicates that further methodologic optimization of recording parameters and data processing pipelines are required before ABRs can be used as a biomarker of TCT response in Sz patients. Further refinements to data collection procedures and processing steps are required
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1984 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book EEG Signal Processing written by Saeid Sanei and published by John Wiley & Sons. This book was released on 2013-05-28 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electroencephalograms (EEGs) are becoming increasingly important measurements of brain activity and they have great potential for the diagnosis and treatment of mental and brain diseases and abnormalities. With appropriate interpretation methods they are emerging as a key methodology to satisfy the increasing global demand for more affordable and effective clinical and healthcare services. Developing and understanding advanced signal processing techniques for the analysis of EEG signals is crucial in the area of biomedical research. This book focuses on these techniques, providing expansive coverage of algorithms and tools from the field of digital signal processing. It discusses their applications to medical data, using graphs and topographic images to show simulation results that assess the efficacy of the methods. Additionally, expect to find: explanations of the significance of EEG signal analysis and processing (with examples) and a useful theoretical and mathematical background for the analysis and processing of EEG signals; an exploration of normal and abnormal EEGs, neurological symptoms and diagnostic information, and representations of the EEGs; reviews of theoretical approaches in EEG modelling, such as restoration, enhancement, segmentation, and the removal of different internal and external artefacts from the EEG and ERP (event-related potential) signals; coverage of major abnormalities such as seizure, and mental illnesses such as dementia, schizophrenia, and Alzheimer’s disease, together with their mathematical interpretations from the EEG and ERP signals and sleep phenomenon; descriptions of nonlinear and adaptive digital signal processing techniques for abnormality detection, source localization and brain-computer interfacing using multi-channel EEG data with emphasis on non-invasive techniques, together with future topics for research in the area of EEG signal processing. The information within EEG Signal Processing has the potential to enhance the clinically-related information within EEG signals, thereby aiding physicians and ultimately providing more cost effective, efficient diagnostic tools. It will be beneficial to psychiatrists, neurophysiologists, engineers, and students or researchers in neurosciences. Undergraduate and postgraduate biomedical engineering students and postgraduate epileptology students will also find it a helpful reference.
Download or read book Brain Computer Interface Research written by Christoph Guger and published by Springer. This book was released on 2017-04-29 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the prize-winning brain-computer-interface (BCI) projects honored in the community's most prestigious annual award. BCIs enable people to communicate and control their limbs and/or environment using thought processes alone. Research in this field continues to develop and expand rapidly, with many new ideas, research groups, and improved technologies having emerged in recent years. The chapters in this volume feature the newest developments from many of the best labs worldwide. They present both non-invasive systems (based on the EEG) and intracortical methods (based on spikes or ECoG), and numerous innovative applications that will benefit new user groups
Download or read book EEG Signal Processing and Feature Extraction written by Li Hu and published by Springer Nature. This book was released on 2019-10-12 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the conceptual and mathematical basis and the implementation of both electroencephalogram (EEG) and EEG signal processing in a comprehensive, simple, and easy-to-understand manner. EEG records the electrical activity generated by the firing of neurons within human brain at the scalp. They are widely used in clinical neuroscience, psychology, and neural engineering, and a series of EEG signal-processing techniques have been developed. Intended for cognitive neuroscientists, psychologists and other interested readers, the book discusses a range of current mainstream EEG signal-processing and feature-extraction techniques in depth, and includes chapters on the principles and implementation strategies.
Download or read book Auditory and Visual Sensations written by Yoichi Ando and published by Springer Science & Business Media. This book was released on 2009-10-08 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ando establishes a theory of subjective preference of the sound field in a concert hall, based on preference theory with a model of human auditory- brain system. The model uses the autocorrelation function and the interaural crosscorrelation function for signals arriving at two ear entrances and considers the specialization of human cerebral hemispheres. The theory may be applied to describe primary sensations such as pitch or missing fundamental, loudness, timbre, and duration. The theory may also be applied to visual sensations as well as subjective preference of visual environments. Remarkable findings in activities in both auditory-brain and visual-brain systems in relation to subjective preference as a primitive response are described.
Download or read book Brain Dynamics written by Erol Başar and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is based on contributions to the second Brain Dynamics Conference, held in Berlin on August 10-14, 1987, as a satellite conference of the Budapest Congress of the International Brain Research Organization. Like the volume resulting from the first conference, Dynamics of Sensory and Cognitive Processing by the Brain, the present work covers new approaches to brain function, with emphasis on electromagnetic fields, EEG, event-related potentials, connectivistic views, and neural networks. Close attention is also paid to research in the emerging field of deterministic chaos and strange attractors. The diversity of this collection of papers reflects a multipronged advance in a hitherto relatively neglected domain, i. e., the study of signs of dynamic processes in organized neural tissue in order both to explain them and to exploit them for clues to system function. The need is greater than ever for new windows. This volume reflects a historical moment, the moment when a relatively neglected field of basic research into available signs of dynamic processes ongoing in organized neural tissue is expanding almost explosively to complement other approaches. From the topics treated, this book should appeal, as did its predecessor, to neuroscientists, neurologists, scientists studying complex systems, artificial intelligence, and neural networks, psychobiologists, and all basic and clinical investigators concerned with new techniques of monitoring and analyzing the brain's electromagnetic activity.
Download or read book Neural Engineering written by Bin He and published by Springer Science & Business Media. This book was released on 2013-01-09 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt: Neural Engineering, 2nd Edition, contains reviews and discussions of contemporary and relevant topics by leading investigators in the field. It is intended to serve as a textbook at the graduate and advanced undergraduate level in a bioengineering curriculum. This principles and applications approach to neural engineering is essential reading for all academics, biomedical engineers, neuroscientists, neurophysiologists, and industry professionals wishing to take advantage of the latest and greatest in this emerging field.
Download or read book Event related Potentials written by Todd C. Handy and published by MIT Press. This book was released on 2005 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first comprehensive handbook to detail ERP methodology, covering experimental design, data analysis, and special applications.
Download or read book A Text Book of Medical Instruments written by S. Ananthi and published by New Age International. This book was released on 2006 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: About the Book: This book has therefore subdivided the realm of medical instruments into the same sections like a text on physiology and introduces the basic early day methods well, before dealing with the details of present day instruments currently in
Download or read book Biological Signal Analysis written by Ramaswamy Palaniappan and published by Bookboon. This book was released on 2011 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brain Computer Interfaces written by Desney S. Tan and published by Springer Science & Business Media. This book was released on 2010-06-10 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: For generations, humans have fantasized about the ability to create devices that can see into a person’s mind and thoughts, or to communicate and interact with machines through thought alone. Such ideas have long captured the imagination of humankind in the form of ancient myths and modern science fiction stories. Recent advances in cognitive neuroscience and brain imaging technologies have started to turn these myths into a reality, and are providing us with the ability to interface directly with the human brain. This ability is made possible through the use of sensors that monitor physical processes within the brain which correspond with certain forms of thought. Brain-Computer Interfaces: Applying our Minds to Human-Computer Interaction broadly surveys research in the Brain-Computer Interface domain. More specifically, each chapter articulates some of the challenges and opportunities for using brain sensing in Human-Computer Interaction work, as well as applying Human-Computer Interaction solutions to brain sensing work. For researchers with little or no expertise in neuroscience or brain sensing, the book provides background information to equip them to not only appreciate the state-of-the-art, but also ideally to engage in novel research. For expert Brain-Computer Interface researchers, the book introduces ideas that can help in the quest to interpret intentional brain control and develop the ultimate input device. It challenges researchers to further explore passive brain sensing to evaluate interfaces and feed into adaptive computing systems. Most importantly, the book will connect multiple communities allowing research to leverage their work and expertise and blaze into the future.
Download or read book Biomedical Technology and Devices Handbook written by George Zouridakis and published by CRC Press. This book was released on 2003-08-14 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concise yet comprehensive, the Biomedical Technology and Devices Handbook illuminates the equipment, devices, and techniques used in modern medicine to diagnose, treat, and monitor human illnesses. With topics ranging from the basic procedures like blood pressure measurement to cutting-edge imaging equipment, biological tests, and genetic engineering, this book is organized to navigate smoothly from simple procedures and concepts to the more sophisticated and complex ones. Each section contains a description of the technique, its technical considerations, and its use according to its applications and relevant body systems. The book includes references to relevant Web sites, protocols, problems, and solutions.
Download or read book The Oxford Handbook of Perceptual Organization written by Johan Wagemans and published by OUP Oxford. This book was released on 2015-08-21 with total page 1121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perceptual organization comprises a wide range of processes such as perceptual grouping, figure-ground organization, filling-in, completion, perceptual switching, etc. Such processes are most notable in the context of shape perception but they also play a role in texture perception, lightness perception, color perception, motion perception, depth perception, etc. Perceptual organization deals with a variety of perceptual phenomena of central interest, studied from many different perspectives, including psychophysics, experimental psychology, neuropsychology, neuroimaging, neurophysiology, and computational modeling. Given its central importance in phenomenal experience, perceptual organization has also figured prominently in classic Gestalt writings on the topic, touching upon deep philosophical issues regarding mind-brain relationships and consciousness. In addition, it attracts a great deal of interest from people working in applied areas like visual art, design, architecture, music, and so forth. The Oxford Handbook of Perceptual Organization provides a broad and extensive review of the current literature, written in an accessible form for scholars and students. With chapter written by leading researchers in the field, this is the state-of-the-art reference work on this topic, and will be so for many years to come.
