Study of Electroencephalogram Pattern from Eye Response to Flickering Light

Abstract

Electroencephalograph (EEG) has been widely used in brain wave mapping studies with several subject conditions, such as in evaluations of dementia and encephalopathy, screening for possible epileptic spikes, investigational for clinical use in mental disorders. In addition, the EEG has also been used to investigate the response of human brain in listening to music, movement of arm, and turning of neck. In this study, electroencephalograph was used to study the eye response to a 20 Hz flickering light. Brain waves recorded during the subject watching flickering light by using wireless electroencephalograph 14 channels. By recording the brain waves of the subject in the “Edf’s” format, the electroencephalogram was then analyzed using tools such as centering, filtering, and Welch’s power spectral density estimation. Using Power Spectra Density (PSD) graph, we can assess the active part of the lobes as eye responds to flickering light, i.e. parietal and occipital lobes. We found that the occipital lobe of six subjects from 9 subjects has higher average intensity in the right side than in the left. Parietal lobe of all subjects also has higher average intensity in the right side than in the left.