摘要
目的研究视神经、视交叉、视束、外侧膝状体等结构的动脉,为视力障碍和血管造影提供基础资料。方法手术显微镜下对100侧成人脑的视神经、视交叉、视束、外侧膝状体的动脉进行显微解剖观察,并做病理组织学研究。结果视神经呈分段分层供血;视交叉中央区微血管稀少;视束的后半部由脉络丛前动脉供血;外侧膝状体的血供为多来源而前外侧为单来源供血。50～70岁60侧脑标本的来源动脉88.3%有动脉硬化改变。结论视神经和视交叉中央部、视束后半部及外侧膝状体的前外侧为血供的危险区;是视野缺损的病因之一。
ObjectiveTo provide morphological evidences for visual field defect of specific diseases by optic pathway angiography.MethodsThe arterial origins,branches and distribution of the optic nerve,optic chiasma,optic tract and lateral geniculate body of 100 cerebral hemispheres were observed under the operating microscope.The originated artery supplying for optic nerves,optic chiasma,optic tract and lateral geniculate body of 60 cerebral hemispheres aged from 50-70 were observed pathohistologically.ResultsThe blood irrigating optic nerve,optic chiasma,optic tract and lateral geniculate body originated mainly from the blood vessels consisting of the Willis circle.The blood irrigating optic nerve originated mainly from internal carotid.The blood supplying optic chiasma came from several arterial origins and the medial zone of the chiasma was relatively lack of blood irrigation.The front part of the optic tract supplied with several arterial blood vessels,however,the end half of the optic tract solely irrigated with anterior choroidal artery.The main part of lateral geniculate body supplied with multi-origins arterial vessels,but the front and lateral part supplied with one-origin arterial vessel.Pathohistological examination revealed 88.3% of originated arteries irrigating visual pathway with atheroslerosis in 60 cerebral hemispheres.ConclusionThe medial zone of the optic chiasma,the end half of the optic tract,the front and lateral part of lateral geniculate body are relatively lack of blood supply.Once the supplying blood vessels blocked or compressed,visual field defect would not be avoided.
出处
《眼科研究》
CSCD
北大核心
2005年第3期304-307,共4页
Chinese Ophthalmic Research
基金
河北省科技厅科技攻关项目(03276137)
关键词
视神经
视交叉
视束
外侧膝状体
血供
动脉硬化
optic nerve
optic chiasma
optic tract
lateral geniculate body
blood supply
atheroslerosis
