Gert Pfurtscheller

Bio: Gert Pfurtscheller is an academic researcher from Graz University of Technology. The author has contributed to research in topics: Brain–computer interface & Electroencephalography. The author has an hindex of 117, co-authored 507 publications receiving 62873 citations. Previous affiliations of Gert Pfurtscheller include University of Graz.

Hirndruckanstieg beim Monitoring akustisch evozierter Hirnstammpotentiale mittels Kopfhörer

Abstract: Ten measurements of intracranial pressure (ICP) (ventricular n = 5, epidural n = 3) in 8 patients (3 after aneurysm surgery, 5 with head trauma) were performed before and after application of conventional headphones for stimulating brainstem auditory evoked potentials (BAEP). The effects of miniature earphones and sound tubes on ICP were also studied. In 7 of 10 measurements after application of headphones a reversible increase of ICP (mean 26 +/- 19% in patients with ICP greater than 10 mmHg was recorded; in 3 patients (ICP less than or equal to 10 mgHg) no changes of ICP were seen. Using miniature earphones and sound tubes no increase of ICP was noted in any patient, and hence these can be recommended for stimulating BAEP in case of increased ICP.

EEG Signal Analysis based on Quasi-AR Model

Abstract: In this paper, quasi-AR model is introduced in order to analyze EEG signals. And it is discussed that feature extraction method by using linear structure of quasi-AR model, and statistical pattern recognition method. Applying to EEG signals during right and left motor imagery, the validity of quasi-AR model is confirmed.

Multimodal evoked potentials and heart rate variability in comatose patients. 2. Visual evoked potentials and computed tomographic findings

Abstract: Visual evoked potentials (VEPs) were examined as an integrated parameter in a multimodal EP study of brain bioelectrical activity in 33 comatose patients (Glasgow Coma Score 3-6) after craniocerebral trauma. Recordings were performed not only from the occipital (01-02) but also from the central (Cz-C3, Cz-A1, Cz-C4) and frontal (F3-F4) areas. The results show an attenuation of the vertex VEP (SNR 3.2 +/- 1.7) and an increase in the occipital VEP (SNR 4.8 +/- 2.3) as compared to the control group (SNR vertex 7.0 +/- 3.0/SNR occipital 3.9 +/- 2.0). In addition, 16 of the comatose patients showed a very considerable loss of the normally polyphasic character of the occipital VEP in favour of a potential that looked almost monophasic; this was either left or right dominant, and was recorded as a negative or positive potential, respectively, in bipolar recording (01-02). Comparison of the electrophysiological and computer tomography findings showed a laterally correlated change in the occipital VEP: contralateral to the injured hemisphere, the VEP was dominant, ipsilateral it was reduced or extinguished.

The Design and Analysis of Experiments

Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON

Principles of Neural Science

Abstract: I have developed "tennis elbow" from lugging this book around the past four weeks, but it is worth the pain, the effort, and the aspirin. It is also worth the (relatively speaking) bargain price. Including appendixes, this book contains 894 pages of text. The entire panorama of the neural sciences is surveyed and examined, and it is comprehensive in its scope, from genomes to social behaviors. The editors explicitly state that the book is designed as "an introductory text for students of biology, behavior, and medicine," but it is hard to imagine any audience, interested in any fragment of neuroscience at any level of sophistication, that would not enjoy this book. The editors have done a masterful job of weaving together the biologic, the behavioral, and the clinical sciences into a single tapestry in which everyone from the molecular biologist to the practicing psychiatrist can find and appreciate his or