（2）大脑中静脉（middle cerebral veins）：该静脉较粗大，并构成深、浅两个管道。深静脉引流侧裂内各脑回的血液，浅静脉引流侧裂周围脑回以及额叶外侧凸面及眶叶外侧脑回的血液。大脑中静脉浅支的血液进入海绵窦，而深静脉汇入Rosent细菌al基底静脉并zui终汇入直窦。（3）Rostnt细菌al基底静脉(basal veins of Rosent细菌al)：该静脉是大脑大静脉形成前的zui大脑外静脉，由大脑前静脉、大脑中深静脉、纹状体静脉汇集形成，在横池处与大脑内静脉以及按枕-额方向引流距状区静脉血液的大脑后静脉汇合。这些静脉汇聚脑内后形成zui大的桥静脉即Galen静脉，是汇入直窦的zui 大静脉血管。先天发育异常多见。Galen静脉动脉瘤样畸形（Galen aneurysmal malformations, VGAM）是新生儿与婴儿常见的脑血管异常。血管瘤部位较多变，多于胎儿发育第6-11周开始形成，实际是 Markowski静脉（一支在胎儿脑发育期间引流至Galen静脉的血管）的残留。缺如大脑大静脉缺如：脑深部结构的引流静脉正常情况下经大脑大静脉系统（t细菌e Galenic system）引流，如Galen静脉缺如，间脑及基底节向外侧引流至横窦，而不是汇入中线的大脑大静脉系统。本异常极罕见，多在新生儿期即发现，大部分患者死于婴儿早期。血栓大脑大静脉血栓发生率约3~8%，女性多见，可表现为意识障碍、头痛、恶心、视力缺损、乏力、眼动异常及瞳孔反射异常，甚至昏迷等。危险细菌素包括口服细菌药、怀孕期、产褥期等。颈内动脉（internal carotid artery）是经颈总动脉发出后垂直上升至颅底，经过颈动脉管入颅腔，分支分布于视器和脑的动脉。颈内动脉主要分支有大脑前动脉、大脑中动脉、脉络丛前动脉、后交通动脉、眼动脉。

(2) the middle cerebral veins (middle cerebral veins): The veins are thick, and constitute a deep, shallow two pipes. Deep venous drainage of the brain back to the blood within the fissure, superficial venous drainage dorsal hippocampus and the frontal lobe convex lateral lobes and lateral lobes of the brain back to the blood. Blood from the superficial part of the middle cerebral vein enters the cavernous sinus, while the deep vein is introduced into the basal veins of Rosent bacteria and finally into the straight sinus. (3) The basal veins of Rosent bacteria (Ralstonia albicans): This vein is the largest extraventricular vein before the formation of the great cerebral vein. It is formed by the aggregation of the anterior cerebral veins, the middle cerebral veins and the striatum veins, Confluence with the cerebral veins and the posterior cerebral venous drainage of the venous blood in the direction of the pillow-forehead. These veins converge in the brain to form the largest bridge, the Galen veins, which are the largest veins that pass into the straight sinus. Congenital abnormalities more common. Galen aneurysmal malformations (Galen aneurysmal malformations, VGAM) is a common cerebrovascular abnormalities in neonates and infants. The site of the hemangioma is more variable than that at 6-11 weeks of fetal development and is actually the residue of Markowski's vein, a blood vessel that drains into the Galen vein during fetal brain development. Inadequate cerebral venous absence: Drainage veins of the deep brain structure are normally drained by the cerebro-venous system (eGalenic system) such as the absence of Galen veins, lateral drainage of the diencephalon and basal ganglia to the transverse sinus, and It is not the cerebral venous system that plunges into the midline. This abnormality is extremely rare, mostly in the neonatal period that most patients died of early infancy. Thrombosis Cerebral vein thrombosis rate of about 3 ~ 8%, more common in women, manifested as disturbance of consciousness, headache, nausea, visual impairment, fatigue, abnormal eye movements and pupillary reflexes, and even coma. Dangerous bacteriocins include oral bacterial drugs, pregnancy, puerperium and so on. Internal carotid artery (internal carotid artery) is issued by the common carotid artery rises to the base of the skull vertically, through the carotid artery into the cranial cavity, branching distribution in the visual and cerebral arteries. The main branch of the internal carotid artery, anterior cerebral artery, middle cerebral artery, choroid plexus anterior artery, posterior communicating artery, ophthalmic artery.

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