睡眠是人体的生理需要,也是最彻底的休息。人的一生中有三分之一左右的时间是在睡眠中度过。因此,科学而合理的睡眠,是关系到人体健康的重要保证。众所周知,神经系统的功能包括兴奋和抑制两个过程。睡眠就是神经系统抑制扩散到整个大脑皮层和皮层下的结果。此时一切生理活动,如眼、耳、口、鼻、舌等感觉功能都减到最低水平。人体似乎与周围事物暂时失去了联系。全身骨骼肌紧张减低,反射运动减弱,对各种刺激的反应明 Sleep is the body’s physiological needs, but also the most complete rest. About a third of a person’s lifetime is spent in sleep. Therefore, scientific and reasonable sleep, is an important guarantee for human health. It is well-known that the nervous system functions include excitement and inhibition of both processes. Sleep is the result of the nervous system inhibiting proliferation down the entire cortex and cortex. At this point all physical activity, such as eyes, ears, mouth, nose, tongue and other sensory functions are reduced to a minimum level. The human body seems to have temporarily lost contact with the surroundings. Skeletal muscle tension decreased, reflex movement weakened, the response to various stimuli