The control of the cerebral circulation.
The control of the cerebral circulation.
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大脑循环的控制。
DOI：
10.1001/jama.1961.03040430026006
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发表时间：
1961
期刊：
影响因子：
--
通讯作者：
P. Novack
中科院分区：
文献类型：
--
作者：
H. Shenkin;P. Novack
脑循环在很大程度上受到脑外因素的限制，即总动脉血压和心输出量。维持脑血流量，直到心输出量减少三分之一以上或血压降至正常值的一半或以下。在这些广泛的限制范围内，脑血流量受内在因素的调节，主要是脑血管紧张度，而脑血管紧张度又受化学因素的显著影响，主要是呼吸气体，仅受神经性因素的轻微影响。
The cerebral circulation is broadly limited by factors extrinsic to the brain, namely the general arterial blood pressure and the cardiac output. The cerebral blood flow will be maintained until the cardiac output is decreased by more than a third or the blood pressure is lowered to half or less of the normal value. Within these broad limits the cerebral blood flow is regulated by intrinsic factors, principally the cerebrovascular tone, which in turn is markedly influenced by chemical factors, chiefly the respiratory gases, and only slightly affected by neurogenic factors.