日志正文
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脑桥症状(1)颅神经症状:脑桥病变引起的三叉神经症状以病灶侧面部感觉障碍为主,角膜反射减低或丧失,同侧咀嚼肌萎缩且肌力弱,张口下颌偏向患侧,外展神经麻痹,眼球内斜。(2)感觉障碍:感觉障碍程度不一,有的完全缺失,有的轻度减退。股体感觉障碍及面部感觉可以呈交叉状态。肢体感觉症状又表现为分离性感觉障碍。(3)运动麻痹:多于病灶对侧出现偏瘫。脑桥下部病变时,病侧出现面神经麻痹,对侧出现偏瘫,同时病灶侧尚有外展神经麻痹。(4)小脑症状:小脑症状为为脑桥病变重要的症状之一 ,脑桥与小脑关系密切,脑桥病变时病灶侧出现共济失调及其他小脑症状。(5)精神及睡眠障碍:脑桥病变因损伤脑干网状结构可出现精神障碍、智力下降及睡眠障碍,起初淡漠、嗜睡、悲痛易哭、继之则好动,语言讷吃。 治疗由于目前的显微神经外科技术比较发达,能够进行一部分病人的全切手术。 同时采用节拍式化疗和血管抑制治疗。是可以对一部分患者进行根治的。 http://naowaike.blog.sohu.com/55822421.html 下面是一些详细的脑干区域的解剖结构和功能: Hopefully, all of you know where the spinal cord is and lots about the organization of the various ascending and descending pathways. Now we will move rostrally into the brain stem. If you look at the drawings below you will see three MRIs in the middle column. The poor little brain stem is so dwarfed by other brain structures that I have had to enclose it with a white box and point to it with a white arrow!!!! However, I have added schematic enlargements of the boxed in areas. Again, as in the spinal cord, ventral is up and dorsal is down and the right side of the patient’s brain is on your left.
The figure below on the right shows the entire ventral surface of the brain stem. The lines and arrows connecting the ventral view with the three MRI images are to help you understand what is left and right. Do not worry about the bumps, grooves and nerves shown on this ventral view, that will come later. Right now just orient yourself!! Both the dorsal and ventral surfaces of the brain stem are shown below. We already know what is right and left on the ventral view. Now, take the page out of your notebook and fold it along the dotted line (yes, this is medical school!) and you can see that what lies beneath (is dorsal) the right side of the ventral aspect of the brain stem is the right side of the dorsal aspect of the brain stem, and what lies below the left side of the ventral aspect of the brain stem is left side of the dorsal aspect of the brain stem.
最后修改于 2010-04-28 16:13
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