午睡在許多人的生活中扮演著不可或缺的角色，許多人習慣在午餐過後小睡片刻，藉此提升午後的學習或工作效率，因此不光是學生，習慣在工作場所午睡的成年人也是相當的普遍。見得午睡的重要性之後，我們便開始關心短暫的睡眠是否確實有助於提升午後的工作效率，抑或是多長的午睡時間效果最好都是我們想研究的議題。本論文設計了一套午睡實驗來探討睡至不同睡眠階段(stage 2 和 slow wave sleep)後喚醒的午睡對於程序型記憶、陳述型記憶和睏睡度是否有所幫助。在程序型記憶我們設計了固定序列打字測驗來測試，在陳述型記憶我們設計字詞配對測驗來測試。本實驗將總共105位受試者隨機分配至三組：S2組、SWS組及Wake組，每組各有35位非習慣午睡的受試者參與。由實驗結果可以發現S2組在行為表現及睏睡度相較於另外兩組皆有明顯的改善。SWS組在行為表現及睏睡度相較於S2組來得差，其原因可推測是受到深層睡眠的睡眠慣性之影響。Wake組在行為表現與睏睡度的效果都是最差的。因此我們建議午睡要睡至stage 2十分鐘後喚醒的效果最佳，藉此可達到午睡過後較好的學習及工作效率。

Nap plays an integral role in the lives of many people. Many people are used to take a nap after lunch in order to improve the efficiency of study or work afternoon. Therefore, not only students, but adults who have habits of nap in the workplace are very common. After we seem the importance of a nap, we started to care whether a short nap can improve the efficiency of work afternoon or not and how long should we nap for the best effect. In this paper, a nap experiment was designed to research nap with different sleep stages (stage 2 and slow wave sleep) and whether they improved procedural memory, declarative memory and sleepiness or not. For procedural memory, a sequential finger-tapping task was applied. For declarative memory, a paired associates learning task was used. One hundred and five subjects were randomly assigned to S2 group, SWS group, or Wake group. Each group had thirty-five non-habitual nappers. The result showed that S2 group was better not only in sleepiness reduction but also in both procedural and declarative memory consolidation than SWS and Wake group. The SWS group had worse sleepiness reduction and behavioral performance than S2 group which might be influenced by sleep inertia from deep sleep. The sleepiness and performance of Wake group was worst in three groups. Therefore, we suggest that 10 minutes after stage 2 nap. By this way, people can achieve a better learning and working efficiency after a nap.

Akerstedt T., and Gillberg M., “Effects of sleep- deprivation on memory and sleep latencies in connection with repeated awakenings from sleep,” Psychophysiology, vol. 16, pp. 49-52, 1979.
Alger S. E., Lau H., and Fishbein W., “Delayed Onset of a Daytime Nap Facilitates Retention of Declarative Memory,” Plos one, vol. 5, an. e12131, 2010.
Backhaus J., and Junghanns K., “Daytime naps improve procedural motor memory,” Sleep medicine, vol. 7, pp. 508-512, 2006.
Brooks A., and Lack L., “A brief afternoon nap following nocturnal sleep restriction: Which nap duration is most recuperative?,” Sleep, vol. 29, pp. 831-840, 2006.
Campbell S. S., Stanchina M. D., Schlang J. R., and Murphy P. J., “Effects of a Month-Long Napping Regimen in Older Individuals,” Journal of the american geriatrics society, vol. 59, pp. 224-232, 2011.
Diekelmann S., and Born J., “SLEEP The memory function of sleep,” Nature reviews neuroscience, vol. 11, pp. 114-126, 2010.
Dinges D. F., Orne M. T., Whitehouse W. G., and Orne E. C., “Temporal placement of a nap for alertness - contributions of circadian phase and prior wakefulness,” Sleep, vol. 10, pp. 313-329, 1987.
Ficca G., Axelsson J., Mollicone D. J., Muto V., and Vitiello M. V., “Naps, cognition and performance,” Sleep medicine reviews, vol. 14, pp. 249-258, 2010.
Fushimi A., and Hayashi M., “Pattern of slow-wave sleep in afternoon naps,” Sleep and biological rhythms, vol. 6, pp. 187-189, 2008.
Hayashi M., and Hori T., “The effects of a 20-min nap before post-lunch dip,” Psychiatry and clinical neurosciences, vol. 52, pp. 203-204, 1998.
Hayashi M., Ito S., and Hori T, “The effects of a 20-min nap at noon on sleepiness, performance and EEG activity,” International journal of psychophysiology, vol. 32, pp. 173-180, 1999.
Hayashi M., Motoyoshi N., and Hori T., “Recuperative power of a short daytime nap with or without stage 2 sleep,” Sleep, vol. 28, pp. 829-836, 2005.
Hodddes E., Zarcone V., Smythe H., Phillips R., and Dement W. C., “Quantification of Sleepiness: A New Approach,” Psychophysiology, vol. 10, pp. 431-436, 1973.
Iber C., Ancoli-Iseael S., Chesson A. L., and Quan S. F., “The AASM Manual for the Scoring of Sleep and Associated Events: Rules,” Terminology and Technical Specifications, 2007.
Knoblauch V., Munch M., Blatter K., Martens W. L. J., Schroder C., Schnitzler C., Wirz-Justice A., and Cajochen C., “Age-related changes in the circadian modulation of sleep-spindle frequency during nap sleep,” Sleep, vol. 28, pp. 1093-1101, 2005.
Lahl O., Wispel C., Willigens B., and Pietrowsky R., “An ultra short episode of sleep is sufficient to promote declarative memory performance,” Journal of sleep research, vol. 17, pp. 3-10, 2008.
Lau H., Alger S. E., and Fishbein W., “Relational Memory: A Daytime Nap Facilitates the Abstraction of General Concepts,” Plos one, vol. 6, an. e27139, 2011.
Lau H., Tucker M. A., and Fishbein W., “Daytime napping: Effects on human direct associative and relational memory,” Neurobiology of learning and memory, vol. 93, pp. 554-560, 2010.
Malmivuo J., and Plonsey R., Bioelectromagnetism: principles and applications of bioelectric and biomagnetic fields, Oxford University Press, USA, 1995.
Milner C. E., Fogel S. M., and Cote K. A., “Habitual napping moderates motor performance improvements following a short daytime nap,” Biological psychology, vol. 73, pp. 141-156, 2006.
Nishida M., and Walker M. P., “Daytime Naps, Motor Memory Consolidation and Regionally Specific Sleep Spindles,” Plos one, vol. 2, an. e341, 2007.
Plihal W., and Born J., “Effects of early and late nocturnal sleep on priming and spatial memory,” Psychophysiology, vol. 36, pp. 571-582, 1999.
Rechtschaffen A., and Kales A., A manual of standardized terminology, techniques and scoring system for sleep stages of human subjects, Bethesda, Md., U. S. National Institute of Neurological Diseases and Blindness, Neurological Information Network, 1968.
Rosekind M. R., Smith R. M., Miller D. L., Co E. L., Gregory K. B., Webbon L. L., Gander P. H., and Lebacqz J. V., “Alertness management: Strategic naps in operational settings,” Journal of sleep research, vol. 4, pp. 62-66, 1995.
Schabus M., Gruber G., Parapatics S., Sauter C., Klosch G., Anderer P., Klimesch W., Saletu B., and Zeitlhofer J., “Sleep spindles and their significance for declarative memory consolidation,” Sleep, vol. 27, pp. 1479-1485, 2004.
Schmidt C., Peigneux P., Muto V., Schenkel M., Knoblauch V., Munch M., de Quervain D. J. F., Wirz-Justice A., and Cajochen C., “Encoding difficulty promotes postlearning changes in sleep spindle activity during napping,” Journal of neuroscience, vol. 26, pp. 8976-8982, 2006.
Seeck-Hirschner M., Baier P. C., Sever S., Buschbacher A., Aldenhoff J. B., and Goder R., “Effects of daytime naps on procedural and declarative memory in patients with schizophrenia,” Journal of psychiatric research, vol. 44, pp. 42-47, 2010.
Stickgold R., and Walker M. P., “Sleep-dependent memory consolidation and reconsolidation,” Sleep medicine, vol. 8, pp. 331-343, 2007.
Takahashi M., Fukuda H., and Arito H., “Brief naps during post-lunch rest: effects on alertness, performance, and autonomic balance,” European journal of applied physiology and occupational physiology, vol. 78, pp. 93-98, 1998.
Tietzel A. J., and Lack L. C., “The recuperative value of brief and ultra-brief naps on alertness and cognitive performance,” Journal of sleep research, vol. 11, pp. 213-218, 2002.
Tucker M. A., and Fishbein W., “Enhancement of declarative memory performance following a daytime nap is contingent on strength of initial task acquisition,” Sleep, vol. 31, pp. 197-203, 2008.
Tucker M. A., Hirota Y., Wamsley E. J., Lau H., Chaklader A., and Fishbein W., “A daytime nap containing solely non-REM sleep enhances declarative but not procedural memory,” Neurobiology of learning and memory, vol. 86, pp. 241-247, 2006.
Wamsley E. J., Tucker M. A., Payne J. D., and Stickgold R., “A brief nap is beneficial for human route-learning: The role of navigation experience and EEG spectral power,” Learning & memory, vol. 17, pp. 332-336, 2010.