Title :
Fourier series applied to oscillatory potentials
Author :
Alfieri, Rinaldo ; Albuisson, Eliane ; Boire, Jean-Yves
Author_Institution :
Dept. of Biomath., Fac. of Med., Clermont-Ferrand, France
Abstract :
The authors want to isolate e-waves using their Fourier spectrums. The electroretinograms are averaged. A 4 Hz flash stimulus is used and a first spectral set (the fundamental´s amplitude at 4 Hz is taken as reference) is determined. Next, the e-waves are suppressed (linear interpolation) and a second spectral set is determined. e-wave characteristic spectrums are obtained from the difference between sets (linear operation). The true period of e-waves, in this case 7 ms, is determined theoretically. The energetic contribution of each harmonic is given.<>
Keywords :
Fourier transform spectra; bioelectric potentials; signal processing; 4 Hz; Fourier series; e-waves; electroretinograms; flash stimulus; harmonic energy; linear interpolation; oscillatory potentials; spectral set;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94846
