（2）大腦中靜脈（middle cerebral veins）：該靜脈較粗大，并構(gòu)成深、淺兩個管道。深靜脈引流側(cè)裂內(nèi)各腦回的血液，淺靜脈引流側(cè)裂周圍腦回以及額葉外側(cè)凸面及眶葉外側(cè)腦回的血液。大腦中靜脈淺支的血液進入海綿竇，而深靜脈匯入Rosent細菌al基底靜脈并zui終匯入直竇。（3）Rostnt細菌al基底靜脈(basal veins of Rosent細菌al)：該靜脈是大腦大靜脈形成前的zui大腦外靜脈，由大腦前靜脈、大腦中深靜脈、紋狀體靜脈匯集形成，在橫池處與大腦內(nèi)靜脈以及按枕-額方向引流距狀區(qū)靜脈血液的大腦后靜脈匯合。這些靜脈匯聚腦內(nèi)后形成zui大的橋靜脈即Galen靜脈，是匯入直竇的zui 大靜脈血管。先天發(fā)育異常多見。Galen靜脈動脈瘤樣畸形（Galen aneurysmal malformations, VGAM）是新生兒與嬰兒常見的腦血管異常。血管瘤部位較多變，多于胎兒發(fā)育第6-11周開始形成，實際是 Markowski靜脈（一支在胎兒腦發(fā)育期間引流至Galen靜脈的血管）的殘留。缺如大腦大靜脈缺如：腦深部結(jié)構(gòu)的引流靜脈正常情況下經(jīng)大腦大靜脈系統(tǒng)（t細菌e Galenic system）引流，如Galen靜脈缺如，間腦及基底節(jié)向外側(cè)引流至橫竇，而不是匯入中線的大腦大靜脈系統(tǒng)。本異常極罕見，多在新生兒期即發(fā)現(xiàn)，大部分患者死于嬰兒早期。血栓大腦大靜脈血栓發(fā)生率約3~8%，女性多見，可表現(xiàn)為意識障礙、頭痛、惡心、視力缺損、乏力、眼動異常及瞳孔反射異常，甚至昏迷等。危險細菌素包括口服細菌藥、懷孕期、產(chǎn)褥期等。頸內(nèi)動脈（internal carotid artery）是經(jīng)頸總動脈發(fā)出后垂直上升至顱底，經(jīng)過頸動脈管入顱腔，分支分布于視器和腦的動脈。頸內(nèi)動脈主要分支有大腦前動脈、大腦中動脈、脈絡(luò)叢前動脈、后交通動脈、眼動脈。

(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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