Effect of movie clips on human brain

Abstract

In this paper, we investigated the changes in brain activation with respect to watching movie clips in order to understand its effect on human brain. Electroencephalography (EEG) data was recorded using 24-channel EEG machine while subjects watched the movie clips. 14 male subjects were recruited for this research project. Two conditions were used in collecting EEG data; i) under eyes open condition while subjects looking at a white screen for five minutes and ii) while subjects watched selected movie clips for 20 minutes. Hence, the eyes open condition at resting state was considered as baseline and the brain activation signal due to movie clips was compared with the baseline for analysis. After data acquisition, data were cleaned to remove artifacts like eye blinking, eye movement and drowsiness. Three features were used in this research to analyze the EEG data, i.e., absolute power, coherence and phase lag. Each of the features was analyzed in four frequency bands, i.e., delta, theta, alpha and beta. It was found that the absolute power for beta and alpha bands was higher in occipital, parietal, frontal and motor regions while watching movie clips as compared to baseline. Beta band was associated with learning and making responses. The frontal and the central brain lobes were highly coherent in beta and alpha bands indicating connectivity between the frontal and central regions. Faster communication between the occipital, parietal, frontal and motor areas was also observed in the phase lag analysis.