STUDY OF THE IMPACT OF SPLIT SLEEP ON FATIGUE BASED ON CHANGES IN ELECTROENCEPHALOGRAM (EEG) SIGNALS WHILE DRIVING A TRAIN SIMULATOR

• Main Author: E. T., Clementine
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68718
• Institution: Institut Teknologi Bandung

Fatigue is recognized as a major safety issue in the rail transport. Sleep-related factors are one of the factors that affect the level of fatigue. Drowsiness which is a form of fatigue can be caused by split sleep. Split sleep is common in train operations because rest periods are cut off due to social needs, religious activities, family interests, and commuting. This study aims to examine the impact of split sleep on the fatigue level of train drivers. A total of 9 participants underwent two sleep conditions in this study, namely split sleep and consolidated sleep. The split sleep involves two sleep segments (05.00 – 10.00 and 12.00 – 15.00), while consolidated sleep only involves one sleep segment (05.00 – 13.00). The train simulation will be carried out in the laboratory after each sleep state is conducted. Fatigue level was measured based on changes in the brain wave activity from recorded EEG signals along with the Karolinska Sleepiness Scale (KSS) and Visual Analogue Scale (VAS) subjective questionnaires. Changes in the brain wave activity at the frontal lobe were reviewed from the first and the last 5 minutes of the simulation, while the KSS and VAS values were reviewed every 30 minutes throughout the simulation. The results of this study show a significant difference on ???? relative power between the two sleep states. This indicates that driving with split sleep tends to be more tired than driving with consolidated sleep. However, (????+????)/????, ????, and ???? relative power as well as the score of KSS and VAS did not show significant differences between the two sleep conditions. Thus, split sleep may be applied to train driving activities when required, only if the quantity and quality of the driver's sleep maintained at an optimal state. Fulfilment of the quantity of sleep (7-8 hours per day) and improving the quality of sleep before driving is recommended to be done to reduce the impact of split sleep on fatigue.