Summary
Three dry adult human skulls, two with bilateral and one with unilateral duplication of the optic canal were found. Their gross morphologic features were studied. Optic canals were separated by a septum of variable thickness dividing the posterior part of the canal into a large canal in the usual position and a smaller one inferior to it. The skull with unilateral duplication of the right side had a bony bar forming the carotico-clinoid canal. One of the skulls was disarticulated and its sphenoid had bilaterally duplicated optic canals divided by thin septa, both having a slit. Conventional radiography and CT scans for the optic canal were performed on two of these skulls but not on the disarticulated bone, and the imaging representations of these features were correlated with the anatomic findings on the dry skull.
Résumé
3 crânes humains secs, 2 avec une duplication bilatérale, 1 avec une duplication unilatérale ont été réunis. Leurs caractéristiques morphologiques ont été étudiées. Les canaux optiques étaient divisés par un septum d'épaisseur variable, à la partie postérieure du canal, en un canal large en position usuelle et un petit canal en-dessous du précédent. Le crâne porteur d'une duplication unilatérale du côté droit avait une barrière osseuse formant le canal carotico-clinoïdien. Un des crânes était désarticulé et le sphénoïde présentait une duplication des canaux optiques par de fins septa fendus. Deux crânes, non désarticulés, ont été examinés en radiographie conventionnelle et en tomodensitométrie et les données ont été comparées à celles de l'examen anatomique.
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Choudhry, R., Anand, M., Choudhry, S. et al. Morphologic and imaging studies of duplicate optic canals in dry adult human skulls. Surg Radiol Anat 21, 201–205 (1999). https://doi.org/10.1007/BF01630902
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DOI: https://doi.org/10.1007/BF01630902