Analysis of fractal and fast fourier transform spectra of human electroencephalograms induced by odors.
Fast Fourier transform (FFT) and fractal dimension (FD) are computed to discover the evoked potentials (EPs) in the base human electroencephalograms (EEGs) corresponding to six types of odor inhalation, one at a time. During the first 20 s of the EEG recording, the patient breathes normally and the rest of the recording time 21-64 s, inhales an odor, when both the eye open and closed modes. FFT spectral analysis cannot discriminate the potential due to olfactory stimuli from the base EEG. However, fractal spectra analysis predicts the evoked potential due to inhalation of English rose, jasmine, lemon, orange, rose garden, and sandalwood concentrates. Similar results are obtained for three of the patients examined and on computing for five EEG recordings of two patients during inhalation of six types of odor.
Murali
S
S
Singapore Institute of Manufacturing Technology, Nanyang Drive, Singapore. murali@SIMTech.a-star.edu.sg
Vladimir
Kulish V
KV
D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D005583:Fourier Analysis; D017709:Fractals; D005625:Frontal Lobe / Q000502:physiology; D006801:Humans; D008959:Models, Neurological; D009812:Odorants; D009833:Olfactory Pathways / Q000502:physiology; D012903:Smell / Q000502:physiology*