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春天,气温回升了,皮下的小血管开始扩张,有一部分血液从内脏器官分流到皮下体系,大脑组织的血液供应和氧气也相对减少,使大脑组织的兴奋性降低,神经的工作处于一种抑制状态。昏昏欲睡正是大脑神经处于抑制状态的一种表现。“春困”是正常的生理现象,只要适当地参加体育锻炼和户外活动
In spring, the temperature rose, subcutaneous small blood vessels began to dilate, part of the blood shunt from the internal organs to the subcutaneous system, the brain tissue of the blood supply and oxygen are also relatively reduced, so that the excitability of brain tissue, nerve work in an inhibitory status. Drowsiness is a sign of depression in the brain. “Spring Sleepy” is a normal physiological phenomenon, as long as the proper participation in physical exercise and outdoor activities