EEG Signal Processing
Chapter One
Introduction to EEG
The neural activity of the human brain starts between the 17th and 23rd week of prenatal
development. It is believed that from this early stage and throughout life electrical signals
generated by the brain represent not only the brain function but also the status of the
whole body. This assumption provides the motivation to apply advanced digital signal
processing methods to the electroencephalogram (EEG) signals measured from the brain
of a human subject, and thereby underpins the later chapters of the book.
Although nowhere in this book do the authors attempt to comment on the physiological
aspects of brain activities there are several issues related to the nature of the original
sources, their actual patterns, and the characteristics of the medium, that have to be
addressed. The medium defines the path from the neurons, as so-called signal sources,
to the electrodes, which are the sensors where some form of mixtures of the sources are
measured.
Understanding of neuronal functions and neurophysiological properties of the brain
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