Sleep is a state in which an animal's body movements are still, its response to external stimuli is reduced, and consciousness is lost, but it can easily return to a level of wakefulness in response to internal and external stimuli. It is a state in which consciousness and bodily functions are partially or completely dormant, bringing rest to the mind and body and actively supporting waking activities. Human sleep is divided into stage 1 (S1) to stage 4 (S4), non-REM (stage NREM) sleep and REM (stage REM) sleep, which generally occur alternately in a 90-minute cycle. Stages 3 and 4 are called slow wave sleep (SWS). Based on EEG patterns, the depth of slow wave sleep is divided into onset phase, light sleep phase, moderate sleep phase, and deep sleep phase, and is considered to be a state in which the brain is resting. During REM sleep, low-amplitude fast waves similar to those of the waking period appear, but muscle tone disappears and eye movements occur actively. During REM sleep, most people are said to be dreaming.
nursingNow, to ensure better quality sleep, regularlivinghabits and sufficient sleep time.environmentconditions. For example,livingHabits include brushing teeth and washing face before sleep, assistance in changing into sleeping clothes, andenvironmentConditions include lighting, temperature, humidity, ventilation, sound, smell, and other physicalenvironmentadjustmentand,privacyThe patient can also be helped to sleep easily with compresses and foot baths. In addition, they can assist in creating conditions that make it easier to fall asleep through compresses and foot baths.

References
1) Kevin Morgan, Jose Cross (Author) / Masaru Kawakami (Translator): Sleep Management in Nursing Practice, Comedical Editor ,2003.
(2) Shuichiro Shirakawa (editor and author): Funny Nursing Sleep Science, Medica Publishing, 1999.
(3) Kiyoko Fukai (supervisor): Evidence of Care Technology - Utilization through Feedback to Practice, HERUSU SHUPPAN, 2006.
(4) Japan Sleep Society (ed.): Sleep Studies, Asakura Shoten, pp. 28. 2009.