Real Time Fear Detection Using Wearable Single Channel Electroencephalogram

Surya Cheemalapati,Prashanth Chetlur Adithya

doi:10.4172/2090-4886.1000140

Surya Cheemalapati, Prashanth Chetlur Adithya

Open Access

https://doi.org/10.4172/2090-4886.1000140

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Abstract

Real time detection of emotional state has multiple applications for security, safety and identification of dangerous situations. Traditionally electroencephalogram (EEG) based emotion studies are conducted in controlled lab environment with multi-channel systems and large signal processing power. In order to be useful in real world situation the system for emotion detection has to be miniature, portable and working in real time supported by calculations that can be provided by a processor power of a mobile phone. Here we present our results on real time fear detection using portable single electrode EEG system conducted on 10 subjects. We studied possibility of translation of the markers previously identified for complex multi-electrode system - ratios of slow waves to fast waves into real time portable system. It was demonstrated using Student’s t-test that the average value of the monitored parameter during normal state was significantly higher than that of during a scary stimulus with a P value of (0.027) ~ 0.03 for Theta/ Beta. The framework for portable fear detection together with the markers discussed in this study can enable many applications important for the soldiers in the battlefield or police officers while being under attack as an indicator that help is urgently needed.

Highlights

Emotions are very important for human existence, since they control our ability of decision making, problem solving, communication and negotiation and allow us to adapt to unpredictable changes in the environments [1,2]
The current limitation of the EEG-based emotion recognition is that most of the results demonstrated on sophisticated equipment without portability and real time detection capabilities
The slow waves to fast waves (SW/FW) ratio average over the whole testing period (155 seconds) for those four days had mean value 3.20 with a standard deviation of 6%. This indicates that the SW/FW ratio is very reproducible for the same subject under identical conditions

Summary

Introduction

Emotions are very important for human existence, since they control our ability of decision making, problem solving, communication and negotiation and allow us to adapt to unpredictable changes in the environments [1,2]. Studies [6,7] analyzed EEG recordings from frontal regions have been used for correlation between SW/FW ratios and emotions such as fear and attention control. Normal EEG recording was conducted on one of the subjects four days in a row under controlled conditions to test the device reproducibility, followed by statistical analysis.

Results

Conclusion