Duplication of Optic Canal in Human Skulls

Ghai, Rashmi; Sinha, Prawal; Rajguru, Jaba; Jain, Shilpi; Khare, Satyam; Singla, Mamta

doi:10.1016/s0003-2778(12)80009-8

Cited by 10 publications

(11 citation statements)

References 4 publications

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“…The distal end of the OC is narrower than the proximal end [29]; the intracranial and orbital openings having average dimensions of 6.25 x 3.70 mm and 4.75 x 5.46 mm, respectively [4]. The canal itself is 8 - 12 mm long and is duplicated in 2.57% of skulls [30]. …”

Section: Reviewmentioning

confidence: 99%

Cranial Nerve Foramina Part I: A Review of the Anatomy and Pathology of Cranial Nerve Foramina of the Anterior and Middle Fossa

Edwards¹,

Wang²,

Iwanaga³

et al. 2018

Cureus

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Cranial nerve foramina are integral exits from the confines of the skull. Despite their significance in cranial nerve pathologies, there has been no comprehensive anatomical review of these structures. Owing to the extensive nature of this topic, Part I of our review, presented here, focuses on the foramina of the anterior and middle cranial fossae, discussing each foramen’s shape, orientation, size, surrounding structures, and structures that traverse them. Furthermore, by comparing the size of each foramen against the cross-sectional areas of its contents, we estimate the amount of free space in each. We also review lesions that can obstruct the foramina and discuss their clinical consequences.

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Section: Reviewmentioning

confidence: 99%

Cranial Nerve Foramina Part I: A Review of the Anatomy and Pathology of Cranial Nerve Foramina of the Anterior and Middle Fossa

Edwards¹,

Wang²,

Iwanaga³

et al. 2018

Cureus

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“…Choudhry et al [3] have estimated the average length of optic canal in their study as 9-11 mm. Ghai et al [8] have reported the average length as 8-12 mm in their study. Thus, many authors have reported about the incidence of the duplicate optic canal in their studies.…”

Section: Discussionmentioning

confidence: 75%

“…Duplication of the optic canal has been reported by many authors. Ghai et al [8] have reported 5 skulls (2.57%) with duplication of optic canal. Out of the 5 skulls, 3 skulls (1.5%) had bilateral, and 2 skulls (1.03%) had unilateral duplication.…”

Section: Discussionmentioning

confidence: 98%

“…It is useful to know the presence of double optic canal while surgically exploring the optic canal during tumor removal and decompression [8]. This knowledge is also essential in surgically approaching the cavernous sinus or sella turcica [8]. The optic canal can be explored safely if the course of the ophthalmic artery is known to the surgeon.…”

Section: Significance Of the Duplication Of Optic Canalmentioning

confidence: 99%

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Study of Duplicated Optic Canals in Eastern Indian Human Skulls

Nayak

Mohanty²,

Das³

2016

Asian J Pharm Clin Res

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Objective: The duplication of optic canals is a rare anomaly found in both sexes, all ages, and various races. The present study was carried out to findthe incidence of duplication of optic canal and to study its clinical and developmental significance.Methods: The study included 100 dry human skulls of both the sexes and various age groups. These skulls were studied grossly and morphologicallyto find out duplication of the optic canals.Results: Additional optic canals were found in 3 skulls (3% cases). Out of them, 2 cases (2%) presented bilateral duplication, whereas in only onecase (1%), it was unilateral.Conclusion: Knowledge of additional optic canals is of paramount importance in performing surgical exploration of the optic canal during removal oftumors or decompression of optic canals or surgically accessing the cavernous sinus or sella turcica.Keywords: Optic canal, Duplication, Anatomy, Skull.

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“…Ghai et al, studied 194 skulls, in that 5(2.57%) showed duplication of optic canal. Out of these three skulls showed bilateral (1.5%) and two skulls showed left sided unilateral (1.03%) [2]. Choudhry et al,observed optic canal in three skulls, in that two were bilateral and one was unilateral and postulated that this bony projection when large, could result in the division of optic canal into two parts, upper larger for the optic nerve and the lower smaller for the ophthalmic artery [3].…”

Section: Discussionmentioning

confidence: 99%

Unilateral Duplication of Optic Canal: A Case Report

Vanitha¹,

Fatima²,

Kadlimatti³

2014

IOSRJDMS

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Optic canal is formed by two roots of lesserwing and body of sphenoid bone. It transmits optic nerve, ophthalmic artery and periarterial sympathetic plexus. During demonstration classes for undergraduate students we observed optic canal of left orbit of the adult skull, showing a thin spicule of bone which divided optic canal into two. Unilateral presence of duplicated optic canal is very rare. This case report may be useful for surgeons and radiologists.

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Duplication of Optic Canal in Human Skulls

Cited by 10 publications

References 4 publications

Cranial Nerve Foramina Part I: A Review of the Anatomy and Pathology of Cranial Nerve Foramina of the Anterior and Middle Fossa

Cranial Nerve Foramina Part I: A Review of the Anatomy and Pathology of Cranial Nerve Foramina of the Anterior and Middle Fossa

Study of Duplicated Optic Canals in Eastern Indian Human Skulls

Unilateral Duplication of Optic Canal: A Case Report

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