EEG WAVEFORMS COMPARISON DURING RECALLING TRAUMATIC EVENTS SESSION IN POST-FLOOD DISASTER VICTIMS FROM SUBANG REGENCY

Abstract

Indonesia, frequently afflicted by natural disasters, often experiences significant mental health repercussions among affected communities, including stress-related disorders, depression, and PTSD. This study investigates the neurophysiological impact of chronic stress and PTSD on flood disaster victims in Subang Regency, Indonesia, utilizing EEG analysis. Data were collected during baseline (BL) and traumatic recalling sessions (RS). Results revealed a significant decrease in delta, alpha, and beta power in the temporoparietal area, indicating reduced cognitive functioning and heightened alertness linked to PTSD. Sex differences highlighted higher theta and alpha activity in males, suggesting deeper memory processing, while females exhibited higher delta activity due to structural cortical differences. Interhemispheric analysis showed left-hemisphere dominance in the anterofrontal region and right-hemisphere activation in the temporoparietal region during trauma recall, aligning with patterns associated with negative emotional processing. Additionally, theta-gamma correlation analysis indicated weakened synchronization in prefrontal and temporoparietal areas, reflecting impaired information processing under stress. These findings provide insights into brain activity patterns in chronic stress and PTSD, contributing to future trauma healing research.