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Abstract #12223 Published in IGR 7-2
Vascularization of the optic pathway and its clinical significance
Liu X; Zhang Z; Liu Y; Zhou H; Zhang YChinese Ophthalmic Research 2005; 23: 304-307
OBJECTIVE: To provide morphological evidences for visual field defect of specific diseases by optic pathway angiography. METHODS: The 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. RESULTS: The 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. CONCLUSION: The 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. LA: Chinese
Dr. X. Liu, Department of Anatomy, North China Coal Medical College, Tangshan, 063000, China
Classification:
6.11 Bloodflow measurements (Part of: 6 Clinical examination methods)
