大脑皮质（狗）的微血管构筑

狗大脑皮质动脉分3种:皮质浅支、皮质深支和皮质下支。这些动脉在脑回部,几乎垂直穿入脑实质。在脑沟部,动脉在脑实质内呈放射状分布。这些血管的分支组成3层血管网:皮质浅层血管网,皮质中层血管网和皮质深层血管网。皮质下支和髓质动脉的分支组成髓质血管网。皮质中层血管网密度最大(479.22±10.05个/mm~2),网眼直径最小。髓质血管网密度最小(25.43±1.49个/mm~2),网眼直径最大。微血管网的密度与神经细胞的密度和功能有密切关系。

MICROVASCULATURE OF THE CEREBRAL CORTEX OF THE DOG

The arteries distributed in the cerebral cortex are classified into three kinds: the superficial cortical,deep cortical and subcorttcal branches.The arteries distributed in the gyri of cerebrum penetrate into the cortex at an almost right angle. The arteries in the sulcus penetrate into the cortex radially.The branches of these vesseis form three layers of microvascular network: superficial cortical network, intermediate cortical network and deep cortical network .The medullary microvascular network is formed by the ?ubcortical branches and the branches of medullary arteries. The density of the cortical microvascular network is closely relative to the density and function of the neurons.