Effect of nap at the desk on working memory and autonomic nervous system

• Main Authors: Chiao-Chun Tseng, 曾巧君
• Other Authors: Yu-Che Tsai
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/56018179648283605695

碩士 === 高雄醫學大學 === 心理學系碩士班 === 105 === Research Purpose: Due to the influence of sleep debt and circadian rhythm, people feeling sleepiness in the afternoon. A daytime nap may serve as a sleepiness countermeasure. In Taiwan, people often nap at the desk or lie on the bed, but the impact of posture is rarely explored. The purpose of this paper is investigate the effects of nap at the desk on sleep, cognitive performance and autonomic nervous system. Research Methods: Seventeen healthy habitual nappers (15 women, 2 men, aged 21.75±2.19) participated in a repeated measures design comprising two experimental conditions(nap at the desk, nap in the bed) with intervals of more than 3 day between conditions. EEG and ECG will be recorded during the daytime nap, participants were awakened after 30 minutes of stage 1 sleep. Subjective alertness, performance on working memory task, sleep-related scale, and the self-assessment performance scale were measured before and after the nap. Research Result: Compared to nap in the bed, people who nap at the desk had significantly less total sleep time and sleep efficiency, and more wake time after sleep onset and sleep latency, and they also subjectively report poor sleep quality. Performance on working memory task did not improve after awake in both two conditions. However, on the contrary, participants assess their own performance becomes good after nap at the desk. Compared to nap in the bed, people who nap at the desk had increase lnLF and LF/HF from baseline to sleep. In baseline, people who nap at the desk had higher lnHF, with lower LF/HF. Conclusion: Nap in the bed had better subjective and objective sleep, and autonomic activity. The data also suggested the effect of lying down to sleep is the best. However, rest the head and arms on the desk can be more relaxed in physically. There is no difference in the performance after awake in both two nap posture.