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lateral chiasma
相关语句
  相似匹配句对
     Modern lateral orbitotomy
     现代外侧开眶术
短句来源
     There are lateral fins on the flagellum.
     鞭毛上有侧鳍。
短句来源
     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.
     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;
短句来源
     THE BLOOD SUPPLY OF CHIASMA AND ITS CLINICAL SIGNIFICANCE
     视交叉的血液供应及其临床意义
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The blood supply system of the optic chiasma was studied in 85 fresh human specimens using various histological and anatomical methods. Computer image analysis and ultrastructural examinations of the microvessel in 58fetal specimens were also conducted. The authors found that the medial portion of the chiasma is a weak point in the microcirculation network. This weak point is apt to be disturbed first and become ischemic. causing disorders of the crossing optic nerve fibers and resulting in characterestic bitemporal...

The blood supply system of the optic chiasma was studied in 85 fresh human specimens using various histological and anatomical methods. Computer image analysis and ultrastructural examinations of the microvessel in 58fetal specimens were also conducted. The authors found that the medial portion of the chiasma is a weak point in the microcirculation network. This weak point is apt to be disturbed first and become ischemic. causing disorders of the crossing optic nerve fibers and resulting in characterestic bitemporal visual field defects. SEM studies showed no ultrastructural difference between the capillaries at the medial and lateral portions of the chiasma. It was concluded that: 1) No special artery supplies the median chiasma the weak point of microcirculation at the median chiasma is due to its relatively scanty capillary distribution; 2) "lateral chiasma arteries" could provide a better blood supply to the lateral fibers and thus the nasal quadrantic visual field could be preserved in many late stages of visual field defect in sellar region tumors, 3) cases with pituitary microadenoma which is not sufficiently large to press the chiasma but involves bitemporal visual field defect are due to the tumor recieving “shunt-flow” (stealing blood) from the chiasma through the peri-infundibulum plexus.

VASCULARARCHITECTUREOFTHEHUMANOPTICCHIASMAANDBITEMPORALHEMIANOPIALaoYuanxiu;(劳远秀)GaoHua(高桦)andZhongYong(钟勇)(DepartmentofOphth...

 
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