The Investigation of the Course of Intracranial of Optic Nerve and Histological Analysis

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Objective: Optic nerve (Cr2) mediates sense of vision and has a large number of fibers and also it has important relationships. Due to many problems resulting from the Cr2 itself or related structures, this nerve or the related structures may be frequently operated. That is why the knowledge of the Cr2 is essential. Material and methods: In our study intracranial parts of 40 Cr2’s and also optic chiasmas (CO) from 20 forensic autopsy cadavers were taken and examined and also tissue samples were obtained. The intracranial course of Cr2’s and CO’s were carefully noted. Possible types of variations were investigated. Then tissue samples were stained with Hematoxylin-Eosin for histological investigation. Results: Macroscopically, atrophic or hypoplasic Cr2’s were not found in the examined cadavers. The measurements revealed that the intracranial length of Cr2 was 11.1±1.02 mm right and 9.9±0.92 mm left. CO’s were in close relation with internal carotid arteries on each side. We found that the width, anteroposterior length and the height of CO were 12.68±0.95 mm, 8.75±01.15 mm and 4.32 ±0.25 mm respectively. Microscopically, intrapial width and intrapial height of the Cr2’s were measured as 3.69±0.27 mm and 2.85 ±0.19 mm respectively. The intrapial width of CO’s was found to be 11.67± 0.92 mm. The intrapial height in the median line of CO’s was 2.62±0.17 mm. Conclusion: We believe that the results obtained by the examination of the intracranial part of the Cr2 and CO by the histological investigations will contribute to the demography of our country. These data will help the clinicians and contribute to the researchers who will study in this field

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optic nerve , optic chiasm , anatomy , histology.

Kocatepe Medical Journal

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Kocatepe Medical Journal