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Abstract
Stress is a complex response that begins when people are exposed to various stressors, including psychological and environmental factors, which are associated with negative cognitive effects. However, little is known about their interactions within the brain. This research aimed to examine the influence of low and high noise levels in the workplace on changes in brain activity in the prefrontal cortex (PFC) during stressful psychological tasks by measuring synchronized functional near-infrared spectroscopy (fNIRS) and electroencephalogram (EEG). The results showed a decreased oxygenated haemoglobin (HbO) concentrations in the right dorsolateral PFC and part of the frontopolar area when exposed to higher noise levels compared to lower levels. Results also showed a higher correlation between fNIRS-HbO and EEG-alpha power under stress conditions compared to other EEG bands. We suggest that higher levels of noise in the workplace may be directly related to increased psychological stress.
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Details
1 Centre for Intelligent Signal and Imaging Research (CISIR), Department of Electrical and Electronic Engineering, University Teknologi PETRONAS, 32610, Seri Iskandar, Perak, Malaysia
2 Department of Electronics & Communication Engineering, Faculty of Engineering & Petroleum, Hadhramout University, Al-Mukalla 50512, Hadhramout, Yemen.; Space Science Centre, Climate Change Institute, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia
3 Department of Electrical and Electronic Engineering, University Teknologi PETRONAS, 32610, Seri Iskandar, Perak, Malaysia
4 Faculty of Medicine, University Kuala Lumpur Royal College of Medicine Perak, 30450, Perak, Malaysia