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KMID : 0389520020090020122
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Sleep Medicine.Psychophysiology
2002 Volume.9 No. 2 p.122 ~ p.126
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Effects of Total Sleep Deprivation on Visual Discrimination
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Lee Heon-Jeong
Yang Jae-Won
Lee Bun-Hee
Ham Byung-Joo
Suh Kwang-Yoon
Kim Leen
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Abstract
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Objectives: The purpose of this study is to investigate the effects of the 37-hour sleep deprivation on visual discrimination using the Cybernetic Flicker Fusion Analyzer(FLIMK) and to see the correlation between this finding and various subjective scale scores.
Methods: Twenty six subjects (20 men 6 women, 24.50_+1.45 years of age) participated in this study. Subjects remained awake for 37 hours under continuous surveillance. In the morning and evening of two study days, the FLIMK and the selfreporting scale of sleepiness, fatigue, anxiety and mood states were instituted.
Results: In FLIMK, the flicker fusion threshold was significantly decreased after sleep deprivatior(F=7.66, p=0.01). The number of trials (responses) before reaching fusion frequency threshold was significantly increased ifter sleep deprivation (F=13.16, p=0.001). The reduction of fusion frequency was correlated with the increase of sleepiness and fatigudp<0.05), and the number of the trials was correlated with the scores of negative mood, anxiety, and fatigue(p<0.05).
Conclusions: These results suggest that 37 hour total sleep deprivation cause the decrement in visual discrimination. The decrease of the fusion frequency after sleep deprivation was correlated with sleepiness and fatigue. Further study is needed to enliOn the biological mechanism of the decrement in visual function after sleep deprivation. Sleep Medicine and Psychophysi? ?logy 2002 ; 9(2) : 122-126
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KEYWORD
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Sleep deprivation, Visual discrimination, Cybermetic flicker fusion analyzer(FLIMK),
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