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Title: Slow eyelid closure as a measure of driver drowsiness and its relationship to performance
Austin Authors: Jackson, Melinda L ;Raj, Susan;Croft, Rodney J;Hayley, Amie C ;Downey, Luke A;Kennedy, Gerard A;Howard, Mark E 
Affiliation: Institute for Breathing and Sleep, Austin Health, Heidelberg, Victoria, Australia
School of Health Sciences, RMIT University, Melbourne, Victoria, Australia
MedStar Health Research Institute, Washington Hospital Center, Washington, DC, USA
School of Psychology, University of Wollongong, Wollongong, NSW, Australia
Centre for Human Psychopharmacology, Swinburne University of Technology, Hawthorn, Victoria, Australia
Department of Psychology, Swansea University, Swansea, Wales, UK
School of Psychology, Counselling & Psychotherapy, Cairnmillar Institute, Melbourne, Victoria, Australia
Issue Date: 2016
Date: 2016-06-11
Publication information: Traffic Injury Prevention 2016; 17(3):251-257
Abstract: Objective: Slow eyelid closure is recognized as an indicator of sleepiness in sleep-deprived individuals, although automated ocular devices are not well validated. This study aimed to determine whether changes in eyelid closure are evident following acute sleep deprivation as assessed by an automated device and how ocular parameters relate to performance after sleep deprivation. Methods: Twelve healthy professional drivers (45.58 ± 10.93 years) completed 2 randomized sessions: After a normal night of sleep and after 24 h of total sleep deprivation. Slow eye closure (PERCLOS) was measured while drivers performed a simulated driving task. Results: Following sleep deprivation, drivers displayed significantly more eyelid closure (P < .05), greater variation in lane position (P < .01) and more attentional lapses (P < .05) compared to after normal sleep. PERCLOS was moderately associated with variability in both vigilance performance (r = 0.68, P < .05) and variation in lane position on the driving task (r = 0.61, P < .05).Conclusions: Automated ocular measurement appears to be an effective means of detecting impairment due to sleep loss in the laboratory.
DOI: 10.1080/15389588.2015.1055327
PubMed URL:
Type: Journal Article
Subjects: Professional drivers
Reaction time
Simulated driving
Sleep deprivation
Slow eyelid closure
Standard deviation of lateral position
Appears in Collections:Journal articles

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