Abstract
In 1952, in an article titled “Form and Function in the E.E.G.,” Grey Walter proposed with wise foresight:
The straightforward record in which activity in six or so channels is displayed, with voltage as a function of time, is of little use except as an indicator of technical faults or clinical monstrosities. In the briefest terms, the activity must be analyzed statistically in terms of its frequency, phase and geometry if it is to have any meaning.
If we consider the EEG as a cryptogram, the problem is easier to understand. . . . To decide whether the signal is significant as opposed to noise, the quickest process is to perform a series of frequency analyses; this will not tell us what the meaning is but it will give a good idea as to whether there is a meaning at all.
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Petsche, H. (1993). The EEG—A Cryptogram?. In: Zschocke, S., Speckmann, EJ. (eds) Basic Mechanisms of the EEG. Brain Dynamics. Birkhäuser, Boston, MA. https://doi.org/10.1007/978-1-4612-0341-4_2
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DOI: https://doi.org/10.1007/978-1-4612-0341-4_2
Publisher Name: Birkhäuser, Boston, MA
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