전수면박탈이 정상인의 생리기능과 인지기능에 미치는 영향
The Effect of Total Sleep Deprivation on the Physiological and Cognitive Function
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본 연구는 혈액학적 검사 및 전산화 신경인지기능 검사를 이용하여 수면박탈이 인체의 생리기능 및 인지기능에 미치는 영향에 대하여 알아보고자 하였다. 수면주기에 이상이 없는 건강한 자원자 16명을 대상으로 한 48시간의 전수면박탈은 갑상선호르몬의 농도를 증가시켰으며 백혈구 수치가 상승하였다. 혈액화학검사에서 비록 정상범위 내에서의 변화이기는 하지만, 간담도계의 기능과 관련된 total protein, albumin, alkaline phosphatase, total bilirubin 수치가 유의하게 변화되어 수면박탈의 간담도계 대사에 대한 영향을 시사하였다. 또한 수면박탈에 의해 판단능력, 정보처리속도, 반응행동 능력이 저하되고, 단순주의력, 각성도 유지능력도 부분적으로 저하됨이 확인되었다.
Abstract
Objectives:Purpose of this study was to investigate physiological and neurocognitive effects of total sleep deprivation by using laboratory blood tests and the computerized neurocognitive function test in healthy subjects. Methods:Sixteen healthy volunteers participated in this study. Subjects were recommended to remain awake for 48 hours under continuous surveillance. Lab tests of cortisol, prolactin, thyroid hormone, growth hormone, and immunoglobulin (IgG, IgA, IgM, IgD, IgE), CBC, BC and the Vienna test were performed before and after 48 hours of total sleep deprivation. Results:Concentration of T3 and T4 significantly increased after deprivation. In the reaction test, distribution reaction time significantly increased, and correct reaction significantly decreased. In the vigilance test, amount of correct reaction significantly decreased, and the mean value of correct reaction time was significantly delayed. Level of fasting blood sugar, total protein, albumin, alkaline phosphatase and potassium significantly increased, respectively, except for the level of total bilirubin which was decreased. After total sleep deprivation, WBC counts significantly increased. Regarding immunoglobulin level, IgG, IgA and Ag M concentrations appeared to decrease, but the results were not statistically significant. Conclusion:The effect of total sleep deprivation on physiological function was significant in the level of thyroid hormone. Although statistically not significant, the results of growth hormone and the immune system showed a trend in relations to the effect of total sleep deprivation. Results of blood chemistry suggest that sleep deprivation may influence metabolism of hepatobiliary system. Cognitive impairment was also seen in reactive and vigilant functions after total sleep deprivation. (J Korean Neuropsychiatr Assoc 2007;46(6):539-545)
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