Get Epileptic seizures and the EEG : measurement, models, PDF

By Andrea Varsavsky

ISBN-10: 1439812004

ISBN-13: 9781439812006

Analysis of scientific info utilizing engineering instruments is a quickly becoming zone, either in examine and in undefined, but few texts exist that handle the matter from an interdisciplinary viewpoint. Epileptic Seizures and the EEG: dimension, types, Detection and Prediction brings jointly biology and engineering practices and identifies the points of the sphere which are most crucial to the research of epilepsy.

Analysis of EEG records

The publication starts off by way of summarizing the body structure and the basic principles in the back of the size, research and modeling of the epileptic mind. It introduces the EEG as a measured sign and explains its use within the examine of epilepsy. subsequent, it presents a proof of the kind of mind job prone to check in in EEG measurements, providing quantitative research of the populations of neurons that give a contribution to either scalp and cortical EEG and discussing the restrictions and results that offerings made within the recording approach have at the facts. The ebook offers an outline of ways those EEG documents are and feature been analyzed some time past, focusing on the maths suitable to the matter of category of EEG. The authors use those extracted good points to tell apart among or classify inter-seizure, pre-seizure and seizure EEG.

The problem of seizure prediction

The publication specializes in the matter of seizure detection and surveys the physiologically established dynamic versions of mind task. ultimately, the publication addresses the elemental question: can seizures be envisioned? Through research of epileptic job spanning from three hours to twenty-five years, it really is proposed that seizures could be predictable, however the quantity of knowledge required is larger than formerly suggestion. in accordance with the authors’ large examine, the e-book concludes by way of exploring quite a number destiny chances in seizure prediction.

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Additional resources for Epileptic seizures and the EEG : measurement, models, detection and prediction

Example text

Be part of a sufficiently large population (at least thousands of neurons), 2. Be relatively densely inter-connected, and 3. Have excitatory synapses that for the most part function correctly. These conditions are not a result of the epilepsy itself, but instead exist naturally to sustain everyday activity. Seizures are the result of an abnormality in this network that allows neural activity to become unchecked. Neurons become hyper-active and synchronous, that is, they fire action potentials at a much higher rate than is normal and at the same time as nearby neurons.

10 shows sample EEG of ‘typical’ seizures. Of most importance is the evolution that occurs, shown in (a), where the seizure changes in fundamental frequency as well as morphology over time. In (b) are some examples of different seizure EEG waveforms. In all cases the activity in each channel is more oscillatory than normal, although the shape of the oscillations vary, and the seizure has generalized to involve all channels. 9(d). This highlights the difficulties with differentiation between what is ‘normal’ and what is ‘epileptic’.

Such data must be coupled with a patient’s medical history, including genetic predisposition as well as the nature of the symptoms so that a diagnosis may be made. , smell, dizziness, motor impairment) may provide physicians with information about the location of a seizure focus. Often it is necessary to induce a seizure – in these cases they are provoked by applying stress to the patient in the form of hyperventilation, sleep deprivation or, when appropriate, flashing lights. Once diagnosed treatment can begin6 .

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Epileptic seizures and the EEG : measurement, models, detection and prediction by Andrea Varsavsky

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