Sleepiness on the job: continuously measured EEG changes in train drivers

Torsvall, Lars; Åkerstedt, Torbjörn

doi:10.1016/0013-4694(87)90096-4

Cited by 398 publications

(177 citation statements)

References 12 publications

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“…This EEG slowing gradually increases until the sleep deprived subject dozes off (Torsvall and Akerstedt, 1988b). This phenomenon has been observed in train drivers on the job, with correlation to subjective sleepiness and driving errors (Torsvall and Akerstedt, 1987). The increase in absolute power is related to slowing of RT and increased errors on a vigilance task (Corsi-Cabrera, et al 1996;Lorenzo, 1995).…”

Section: Electrophysiological Measuresmentioning

confidence: 84%

“…Intrasubject analyses have generally yielded better results with more consistent correlations between performance and EEG changes, especially if subjects are drowsy (Makeig and Inlow, 1993;Torsvall and Akerstedt, 1987). While theta and alpha are more consistent markers related to performance, one study reported decreased beta in the seconds prior to stimulus presentation being a better marker than increased theta (Townsend and Johnson, 1979).…”

Section: Eeg-performance Relationshipmentioning

confidence: 99%

“…These slow eye movements (SEMs) may be maximal in an EEG defined awake state with alpha still present and may be the first sign of decreased alertness in up to 50% of subjects (Shimazono et al, 1965;Santamaria and Chiappa, 1987b). SEMs have been associated with decreased performance (Torsvall and Akerstedt, 1987). Of note, SEMs decline again during transition into stage 2 sleep .…”

Section: Physiological Changes Other Than Eegmentioning

confidence: 99%

“…There is a decrease in heart rate and this decrease may be seen even prior to onset of stage 1 (Pivik and Busby, 1996) although the heart rate changes during drowsiness are not great (Torsvall and Akerstedt, 1987;Welch and Richardson, 1973). The heart rate decrease during the sleep onset period appears to relate to decreased sympathetic and increased parasympathetic tone (Zemaityte and Varoneckas, 1984).…”

Section: Physiological Changes Other Than Eegmentioning

confidence: 99%

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Vigilance, alertness, or sustained attention: physiological basis and measurement

Oken

Salinsky

Elsas

2006

Clinical Neurophysiology

678

463

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Vigilance is a term with varied definitions but the most common usage is sustained attention or tonic alertness. This usage of vigilance implies both the degree of arousal on the sleep-wake axis and the level of cognitive performance. There are many interacting neural and neurotransmitter systems that affect vigilance. Most studies of vigilance have relied on states where the sleep-wake state is altered, e.g. drowsiness, sleep-deprivation, and CNS-active drugs, but there are factors ranging from psychophysics to motivation that may impact vigilance. While EEG is the most commonly studied physiologic measure of vigilance, various measures of eye movement and of autonomic nervous system activity have also been used. This review paper discusses the underlying neural basis of vigilance and its assessment using physiologic tools. Since, assessment of vigilance requires assessment of cognitive function this aspect is also discussed.

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Section: Electrophysiological Measuresmentioning

confidence: 84%

Section: Eeg-performance Relationshipmentioning

confidence: 99%

Section: Physiological Changes Other Than Eegmentioning

confidence: 99%

Section: Physiological Changes Other Than Eegmentioning

confidence: 99%

See 2 more Smart Citations

Vigilance, alertness, or sustained attention: physiological basis and measurement

Oken

Salinsky

Elsas

2006

Clinical Neurophysiology

678

463

View full text Add to dashboard Cite

show abstract

“…However, it is likely that other drivers may have had micro sleeps while driving as objective polysomnography recordings of train drivers at work has demonstrated that sleep episodes frequently occur (Torsvall and Åkerstedt 1987).…”

Section: Consequencesmentioning

confidence: 99%