Brainwaves Analysis of Positive and Negative Emotions

Emotions, is the generic term for various subjective cognitive experiences and a psychological and� physiological synthesized state generates under a variety of perceptions, thoughts, and behaviours. In general,� emotion can be categorized into Joyful, Angry, Protected, Sad, Surprised, Fear, Satisfied and Unconcerned� eight types of positive-negative emotions. More subtle and delicate emotions include jealousy, humiliation,� shame, pride and other emotions. Emotion is often under influence of mood, personality, temperament, purpose� and other factors. It can also be affected by hormones and neuro transmitters. Whether positive or negative� emotions are all motivations and trigger action. Although some emotional behaviour seems take place� inadvertent, however conscious plays an important role in producing emotion. This paper from the perspective� of cognitive neuroscience investigates difference of human brainwave of 8 types of positive and negative� emotions i.e. Joyful, Angry, Protected, Sad, Surprised, Fear, Satisfied and Unconcerned. The experiment uses� acoustic stimuli to stimulate the positive and negative emotions of the test subjects and uses� Electroencephalogram (EEG) to extract test subjects’ frontal lobe brainwave. The extracted brainwave is� further transformed into frequency domain signal where sub-band energy is calculated, characterized, and� finally digital encoded for analysis. The encoded characteristic brainwaves of positive and negative emotion are� compared for theirs difference. It shows 8 different positive and negative emotions can be effectively identified� by the proposed emotional brainwave digital encoding technique and the technique is promising for developing� future emotion identification technique.