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To the Editor:
—In a recent paper, Kaufman and Hoagland (Dominant Brain Wave Frequencies as Measures of Physicochemical Processes in Cerebral Cortex, Arch. Neurol. & Psychiat. 56: 207 [Aug.] 1946) have presented a critical appraisal of two methods of frequency analysis of the electroencephalogram, one devised by Brazier and Finesinger (Characteristics of the Normal Electroencephalogram: I. A Study of the Occipital Cortical Potentials in Five Hundred Normal Adults, J. Clin. Investigation23: 303, 1944), the other by my associates and me (Engel, G. L.; Romano, J.; Ferris, E. B.; Webb, J. P., and Stevens, C. D.: A Simple Method of Determining Frequency Spectrums in the Electroencephalogram, Arch. Neurol. & Psychiat. 51: 134 [Feb.] 1944). Our method is compared unfavorably with the Brazier method on the ground that it brings out only empiric changes and "masks the possibility of a rational interpretation of rates of events going on in the brain."
METHODS OF FREQUENCY ANALYSIS OF THE ELECTROENCEPHALOGRAM. Arch NeurPsych. 1947;57(3):379–383. doi:10.1001/archneurpsyc.1947.02300260119012
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