Abstract
Spectral analysis based on the Fourier transform, has been used extensively in the analysis of EEG and other periodic waveforms. We evaluated the usefulness of this technique in 7 infants, ages 7 days to 3 months, being investigated for apnea. Two to three hour recordings were made during sleep of left and right hemispheric electroencephalogram, electrooculogram, electromyogram, electrocardiogram, impedance pneumograph and nasal air flow. For each signal, Fourier transforms of 4 sec epochs were calculated to give amplitude and frequency estimates of each epoch. These estimates were then plotted longitudinally against time to display amplitude and frequency of each signal over the entire recording period. The results clearly showed sleep cycles, EEG asymmetries, obstructive and central apneas and cardiorespiratory responses to apnea which oorrobated other clinical data on the babies. The extensively developed techniques of spectral analysis, including coherence, gain and phase measurements indicate applicability to the study of apnea and could provide quantitative descriptions of the complex interactions between cortical, respiratory, muscoluskeletel and cardiac response and the mechanism (s) and event (s) underlying the genesis of apnea.
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Davis, A., Grondin, D. & Aranda, J. 1643 SPECTRAL ANALYSIS IN THE STUDY OF APNEA OF NEWBORN AND YOUNG INFANTS. Pediatr Res 15 (Suppl 4), 717 (1981). https://doi.org/10.1203/00006450-198104001-01660
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DOI: https://doi.org/10.1203/00006450-198104001-01660
