POWER SPECTRAL ANALYSIS OF BRAINWAVES FOR ALPHA BANDS BY HEAD-MOUNTED DISPLAY (HMD)-BASED VIRTUAL REALITY (VR) STIMULATION

• Main Author: Rahma Gumilar, Alika
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/63212
• Institution: Institut Teknologi Bandung

VR (Virtual Reality) can simulate any imaginable environment and allows users to face real-life scenarios without experiencing real-world risks; divided into monoscopic and stereoscopic VR. Stereoscopic VR environments can create depth perception to provide a realistic, immersive, and stimulating VIMS (Visually Induced Motion Sickness). This final project was conducted to analyze the PSD (Power Spectral Density) of brain electrical activity (Electroencephalogram, EEG) of alpha bands (8-13 Hz) on simulation of VR-HMD (Head-Mounted Display) in 10 male subjects (20-23 years) using Neurosoft Neuron-Spectrum-63 EEG with 19+2 electrodes and SSQ (Questionnaire Sickness Simulator). The EEG data were processed using MATLAB and EEGLAB to obtain PSD estimates using the Welch Periodogram method, while the SSQ was processed to obtain the Nausea, Oculomotor, Disorientation, and Total SSQ scores. The results showed that: the total score of SSQ and sub-symptom Nausea changed significantly due to VR stimulation; Wilcoxon Signed-Rank test for changes in peak PSD of eye-opening conditions to VR stimulation in visual brain regions showed significant changes for 3 of 10 subjects, while the nausea activity area showed a significant change for 5 of 10 subjects. The SSQ and PSD results did not show a pattern. Subjects with high Nausea SSQ scores did not always show a significant difference in peak PSD.