按照大脑的活动规律,合理用脑力,是提高脑力劳动效率的手段,也是消除大脑疲劳,增进身体健康的重要手段。为了更好地让大脑发挥作用,就必须讲究用脑卫生。劳逸结合兴奋与抑制是大脑皮层的活动规律,在看书、工作时,视觉、理解和记忆等区域的脑细胞就兴奋起来,而其它脑细胞则处于抑制状态,如此持续时间过久,兴奋的脑细胞就会因疲劳而转入抑制,这时人的注意力就不集中,思维也就变得迟钝,继而头晕脑胀,甚至头痛起来。这种疲劳反应,是大脑兴奋超过了限度。因此,我们用脑一小时之后,特别是已经感到注意力有些涣散的时候,应暂停用脑,赶快活动一下。中间穿插短暂的体力活动是不够的。要养成每天清晨到户外锻炼的习惯,晚饭后,出门散步。节假日去郊游及登山,等对消除一周的脑力疲 In accordance with the law of the brain activity, the rational use of brain power is to improve the efficiency of mental labor means, but also to eliminate brain fatigue and improve the health of an important means. In order to make the brain work better, we must pay attention to brain health. Combination of work and rest excitement and inhibition of the activity of the cerebral cortex in reading, work, visual, understanding and memory areas such as brain cells excited, while other brain cells are in the state of inhibition, so long duration, excited Brain cells will be due to fatigue and into inhibition, then people’s attention is not focused, thinking becomes dull, and then dizzy, or even headache up. This fatigue reaction is that the brain is over excited to the limit. Therefore, after we use the brain for an hour, especially if we are already distracted by some attention, we should suspend the brain and take a quick action. Interspersed with temporary physical activity is not enough. To develop the habit of exercising outdoors every morning, after dinner, go for a walk. Holiday to go hiking and mountaineering, etc. to eliminate the mental fatigue of a week