有朋友问,最近几天突然特别能睡,晚上并不缺觉,但是白天稍微闲下来就会困得厉害。如果在不缺觉的情况下突然出现这样的问题,尤其是四五十岁之后,就要考虑到脑供血不足的问题,因为这是很多疾病的前兆或者基础,必须重视。什么原因会导致脑供血不足?首先是颈椎问题,颈5颈6关节错位,刺激椎动脉引起动脉血管腔狭窄或血管痉挛,通过的血流量减少,会使局部脑血管发生供血不足。如果是长期伏案,平时又缺乏运动的,你的嗜睡要考虑到这一点。其次,可能是血流动力学障碍引起的。这主要发生在血压降低、心脏搏出量减少时。这种情况夏天更常见,一方面 A friend asked, in recent days, suddenly can sleep especially at night is not lack of sleep, but a little leisure time will be very sleepy. If such problems suddenly emerge without any lack of awareness, especially after the age of 40 or 50, we must consider the issue of insufficient blood supply to the brain because this is a precursor or foundation to many diseases and must be taken seriously. What causes blood supply to the brain is not enough? The first is the cervical spine, neck 5 neck 6 joints dislocation, stimulate the vertebral artery causing arterial stenosis or vasospasm, through the blood flow decreased, will make partial cerebrovascular insufficiency. If it is long-term case, usually lack of exercise, your drowsiness to take this into account. Second, it may be caused by hemodynamic disorders. This occurs mainly in the lower blood pressure, stroke volume reduction. Summer is more common in this situation, on the one hand