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Illumination influences working memory: An EEG study

 JIN YOUNG Park  ;  BYOUNG-KYONG Min  ;  YOUNG-CHUL Jung  ;  HYENSOU Pak  ;  YEON-HONG Jeonge  ;  Eosu Kim 
 NEUROSCIENCE, Vol.247 : 386-394, 2013 
Journal Title
Issue Date
Electroencephalography/methods* ; Female ; Humans ; Light* ; Male ; Memory ; Short-Term/physiology* ; Photic Stimulation/methods* ; Psychomotor Performance/physiology* ; Reaction Time/physiology* ; Young Adult
ACC ; ANOVA ; EEG ; ERP ; LED ; Sternberg task ; analysis of variance ; anterior cingulate cortex ; color-temperature ; electroencephalogram ; event-related potential ; frontal EEG theta activity ; illuminance ; light-emitting diode ; working memory
Illumination conditions appear to influence working efficacy in everyday life. In the present study, we obtained electroencephalogram (EEG) correlates of working-memory load, and investigated how these waveforms are modulated by illumination conditions. We hypothesized that illumination conditions may affect cognitive performance. We designed an EEG study to monitor and record participants’ EEG during the Sternberg working memory task under four different illumination conditions. Illumination conditions were generated with a factorial design of two color-temperatures (3000 and 7100 K) by two illuminance levels (150 and 700 lx). During a working memory task, we observed that high illuminance led to significantly lower frontal EEG theta activity than did low illuminance. These differences persisted despite no significant difference in task performance between illumination conditions. We found that the latency of an early event-related potential component, such as N1, was significantly modulated by the illumination condition. The fact that the illumination condition affects brain activity but not behavioral performance suggests that the lighting conditions used in the present study did not influence the performance stage of behavioral processing. Nevertheless, our findings provide objective evidence that illumination conditions modulate brain activity. Further studies are necessary to refine the optimal lighting parameters for facilitating working memory.
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1. College of Medicine (의과대학) > Dept. of Psychiatry (정신과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Eosu(김어수) ORCID logo https://orcid.org/0000-0001-9472-9465
Park, Jin Young(박진영) ORCID logo https://orcid.org/0000-0002-5351-9549
Jung, Young Chul(정영철) ORCID logo https://orcid.org/0000-0002-0578-2510
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