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Bones of the Orbit

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Atlas of Orbital Imaging

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Abstract

The facial skeleton comprises two orbital cavities. Each of them is an elongated square pyramidal cavity with its base facing anteriorly as the orbital opening, and its axis is directed posteromedially towards the orbital apex. Supported within the orbital cavity by a sizable amount of adipose tissue, the main orbital constituents are the bulbus oculi (the eyeball) and the second cranial (optic) nerve; the extraocular muscles; the third (oculomotor), fourth (trochlear), and sixth (abducens) cranial nerves; the ophthalmic and maxillary divisions of the fifth (trigeminal) cranial nerve; the lacrimal gland and nasolacrimal system; and the ciliary (parasympathetic) ganglion.

The bony orbit and ocular adnexa provide globe protection, allowing normal function and vision. The orbit is comprised of seven distinct cranial bones. CT is the modality of choice for orbital bone imaging; however, MRI can be a valuable adjunct in certain osseous pathologies especially in determining bone marrow involvement.

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Author information

Authors and Affiliations

  1. University of British Columbia, Vancouver, BC, Canada

    Jack Rootman

  2. Division of Orbital and Ophthalmic Plastic Surgery, Stein and Doheny Eye Institutes, University of California, Los Angeles, CA, USA

    Daniel B. Rootman, Stefania B. Diniz, Kelsey A. Roelofs & Claire S. Smith

  3. BFA Art Center College of Design, UBC Faculty of Medicine, Kelowna, BC, Canada

    Bruce Stewart

  4. Neuroradiology Unit, Radiology Department, Rambam Healthcare Medical Center, Haifa, Israel

    Ayelet Eran

  5. Department of Anatomy, Rappaport Faculty of Medicine, Technion – Israel Institute of Technology, Haifa, Israel

    Ayelet Eran, Ben Kaplan & Assaf Marom

  6. Division of Orbital and Ophthalmic Plastic Surgery, Stein Eye Institute, University of California, Los Angeles, CA, USA

    Liza M. Cohen

Authors
  1. Jack Rootman
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  2. Daniel B. Rootman
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  3. Bruce Stewart
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  4. Stefania B. Diniz
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  5. Kelsey A. Roelofs
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  6. Liza M. Cohen
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  7. Claire S. Smith
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  8. Ayelet Eran
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  9. Ben Kaplan
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  10. Assaf Marom
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Corresponding author

Correspondence to Assaf Marom .

Editor information

Editors and Affiliations

  1. Ophthalmic Plastic and Lacrimal Surgery Institute, Department of Ophthalmology, The Goldschleger Eye Institute, Sheba Medical Center, Tel Hashomer, Israel

    Guy Ben Simon

  2. Department of Diagnostic Imaging, Sheba Medical Center, Tel Hashomer, Israel

    Gahl Greenberg

  3. Ophthalmic Plastic and Lacrimal Surgery Institute, Department of Ophthalmology, The Goldschleger Eye Institute, Sheba Medical Center, Tel Hashomer, Israel

    Daphna Landau Prat

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Rootman, J. et al. (2022). Bones of the Orbit. In: Ben Simon, G., Greenberg, G., Landau Prat, D. (eds) Atlas of Orbital Imaging . Springer, Cham. https://doi.org/10.1007/978-3-030-62426-2_1

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  • DOI: https://doi.org/10.1007/978-3-030-62426-2_1

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-62425-5

  • Online ISBN: 978-3-030-62426-2

  • eBook Packages: MedicineReference Module Medicine

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