论文部分内容阅读
脑微循环的重要功能是供给脑神经细胞营养物质和氧,为神经活动提供必要的环境。脑的循环血量相当心输出量的15%,只要减少其中20%的血流量就会使脑造成重大损害,此点与其他脏器不同。另外,血脑屏障能防止受到激素和离子变化等影响。氧和营养物质(葡萄糖)通过毛细血管和微小血管输送到脑组织。脑微动脉通过舒缩改变血管的阻力,以
An important function of brain microcirculation is to supply brain nerve cell nutrients and oxygen, providing the necessary environment for nerve activity. Circulation of the brain’s blood volume equivalent to 15% of cardiac output, as long as the reduction of 20% of the blood flow will make the brain cause significant damage, this point is different with other organs. In addition, the blood-brain barrier can be protected from changes in hormones and ions. Oxygen and nutrients (glucose) are delivered to brain tissue through capillaries and tiny blood vessels. Cerebral arterioles through the contraction of blood vessels to change the resistance to