Detection of migraine in EEG by joint time-frequency representation

Discusses the use of a common joint time-frequency representation, the spectogram, in detection of migraine. Spectogram are computed from electroencephalogram (EEG) obtained by measuring electric potentials on the scalp. Migraine patients often have symptoms of visual and auditory dysfunction, e.g. photophobia and phonophobia. Psychophysical discomfort thresholds to light and sound stimuli are also decreased in migraine patients compared with healthy controls. We hypothesize that due to this dysfunction we are able to detect migraine by exposing them to photic stimulation. Signal response from the occipital area was captured for analysis. Time-frequency analysis of the EEG signal revealed that EEG frequency trace of migraine patients are scattered compared to the normal patients. Time-frequency analysis can therefore provide details of the frequency spread of migraine activities on migraine patients.