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수면 박탈에 의한 인지기능 장애에 대한 카페인의 효과

The Effects of caffeine on cognitive dysfunction induced by sleep deprivation

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키워드

주제분류정신과학

초록

목적: 본 연구는 수면 박탈로 유발되는 인지기능저하에 대한 카페인의 효과를 알아보고자 하였다.방법: 이를 위해 18명의 피검자를 대상으로 다음 상황에서 검사를 시행하였다; 평상시와 같은 충분한 수면, 완전 수면 박탈, 완전 수면 박탈 후 카페인 150mg 투여, 완전 수면 박탈 후 카페인 300mg 투여.결과: 하룻밤의 완전 수면 박탈 시행 후 정상 수면일과 비교하여, 피검자들의 주관적 주간 졸음과 객관적 주간 졸음 정도는 모두 심해졌다. 경계력은 경하게 저하되었으나, 지속적 주의력과 단기 기억력은 유의한 변화가 없었다. 하룻밤의 완전 수면 박탈 후 카페인 150mg 투여 시에는, 주관적인 주간 졸음을 유의하게 개선시키지만 정상 수면을 취한 날 수준으로는 개선시키지 못하였고, 객관적인 주간 졸음정도는 정상 수면을 취한 날과 유의한 차이가 없는 수준까지 개선시켰다. 경계력의 저하는 정상 수면을 취한 날과 유의한 차이가 없는 정도까지 개선시켰다. 하룻밤의 완전 수면 박탈 후 카페인 300mg 투여 시에는, 주관적인 주간 졸음을, 유의하게 개선시켰지만 정상 수면을 취한 정도로까지는 개선시키지 못하였고, 객관적인 주간 졸음정도는 정상 수면을 취한 날과 유의한 차이가 없는 정도까지 개선시켰다. 경계력의 저하는 정상 수면을 취한 날과 유의한 차이가 없는 정도까지 개선시킨다.

Abstract

Objective: The aim of this study is to investigate the effects of caffeine on cognitive dysfunction induced by sleep deprivation. Method: For this, 18 subjects were examined under following conditions; normal usual sleep, one night sleep deprivation, 150mg of caffeine ingestion after one night sleep deprivation, and 300mg of caffeine ingestion after one night sleep deprivation.Results: After one night total sleep deprivation, Subjects felt daytime sleepiness compared to baseline. Objective sleepiness was increased. Vigilance was slightly impaired while continuous attention and short term memory showed no significant change. After one night total sleep deprivation and 150mg of caffeine ingestion, Impaired daytime sleepiness was improved, but not to the level of baseline. Increased objective sleepiness was improved almost to the level of baseline. Vigilance was improved to the level of baseline.After one night total sleep deprivation and 300mg of caffeine ingestion, Impaired daytime sleepiness was improved, but not to the level of baseline. Increased objective sleepiness was improved almost to the level of baseline. Vigilance was improved to the level of baseline. Conclusion: One night total sleep deprivation developed daytime sleepiness, and slightly decreased vigilance, with preserved continuous attention and short-term memory. Caffeine ingestion could significantly improve these subjective daytime sleepiness. Especially for objective sleepiness measured as sleep latency, caffeine could reverse it almost to the level of baseline. And caffeine could improve some impaired cognitive functions, caused by sleep deprivation, to those level of baseline level.

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