Related Experiment Videos
Sleepiness on the job: continuously measured EEG changes in train drivers
Electroencephalography and Clinical Neurophysiology
|June 1, 1987
Summary
Train drivers experience significant sleepiness during night shifts, indicated by increased self-ratings and physiological markers like electroencephalography (EEG) and electrooculography (EOG) changes. These findings highlight risks associated with night work for safety-critical roles.
Area of Science:
- Occupational Health
- Neuroscience
- Sleep Medicine
Background:
- Night work poses risks to alertness in safety-critical professions.
- Objective and subjective measures are needed to assess sleepiness in operational settings.
Purpose of the Study:
- To investigate physiological and subjective sleepiness in train drivers during night and day journeys.
- To correlate electroencephalography (EEG), electrooculography (EOG), and self-rated sleepiness.
Main Methods:
- Eleven train drivers underwent overnight and daytime journeys with continuous EEG, EOG, and ECG monitoring.
- EEG data underwent spectral analysis (FFT); EOG was scored for slow eye movements (SEMs).
- Subjective sleepiness was assessed via self-ratings.
Main Results:
- Sleepiness, alpha and theta band power density, and SEMs significantly increased during night journeys.
- Heart rate remained low during night driving; day journeys showed stable, low values for all metrics.
- High intra-individual correlations were found between self-rated sleepiness and EEG/EOG parameters.
- Severe sleepiness and microsleeps (dozing off) were observed in some drivers, impacting performance.
Conclusions:
- EEG and EOG parameters effectively track sleepiness fluctuations in train drivers during work.
- Objective physiological measures combined with self-reports confirm substantial sleepiness risks during night train operations.
- Findings underscore the need for strategies to mitigate sleepiness in night-working train drivers.