Sleep is a complex physiological process that is regulated globally, regionally, and locally by both cellular and molecular mechanisms. It occurs to some extent in all animals, although sleep expression in lower animals may be co-extensive with rest. Sleep regulation plays an intrinsic part in many behavioral and physiological functions.

2023年4月3日 · Sleep functions in a relatively predictable cyclical pattern between 2 major phases: Non-rapid eye movement (NREM) sleep and rapid eye movement (REM) sleep. NREM sleep is subdivided into several stages numbered 1 to 3.

6 天之前 · Sleep affects almost every type of tissue and system in the body—from the brain, heart, and lungs to metabolism, immune function, mood, and disease resistance. Research shows that a chronic lack of sleep, or getting poor quality sleep, increases the risk of health problems like high blood pressure, cardiovascular disease, diabetes, depression ...

2024年2月29日 · Excessive sleepiness may mean different things for different people. In general, it may involve sleeping more hours than usual and feeling sleepy most of the day. You may feel...

2024年8月9日 · Sleep gives your body time to repair itself and carry out important functions, like clearing out waste and releasing hormones. Without these processes, our bodies can’t function correctly....

2009年12月22日 · When you sleep, your body undergoes a series of changes that enable the rest that is vital to your overall health. Sleep allows the brain and body to slow down and engage in processes of recovery, promoting better physical and …

6 天之前 · In humans, nearly every tissue and organ has its own circadian rhythm, and collectively they are tuned to the daily cycle of day and night. Circadian rhythms influence important functions in the human body, such as: Sleep patterns; Hormone release ; …

2024年1月26日 · Each phase and stage of sleep includes variations in muscle tone, brain wave patterns, and eye movements. The body cycles through all stages approximately 4 to 6 times each night, averaging 90 minutes for each cycle.

2018年12月1日 · The correlation of circadian rhythm with tissue regeneration could have implications in understanding the biology of sleep and tissue regeneration and in enhancing the efficacy and timing of surgical procedures.

Although sleep is a ubiquitous behavior in animal species with well-developed central nervous systems, many aspects in the neurobiology of sleep remain mysterious.