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Abnormal Skull
Published in Swati Goyal, Neuroradiology, 2020
The anterior skull base, comprising ethmoid and frontal bones, separates the anterior cranial fossa (ACF) from the paranasal sinuses and the orbits: Multiple small perforations in the cribriform plate of the ethmoid bone transmit olfactory nervesThe anterior ethmoidal foramen transmits the anterior ethmoidal vessels and the nasociliary nerveThe posterior ethmoidal foramen transmits the posterior ethmoidal vessels and nerve
Periorbital Region and Tear Trough
Published in Ali Pirayesh, Dario Bertossi, Izolda Heydenrych, Aesthetic Facial Anatomy Essentials for Injections, 2020
Colin M. Morrison, Ruth Tevlin, Steven Liew, Vitaly Zholtikov, Haideh Hirmand, Steven Fagien
The ophthalmic artery (OA) is the artery of the orbit originating from the internal carotid artery within the middle cranial fossa. After traveling through the optic foramen, it divides into multiple arterial branches within the orbital cavity [34]. The OA is considered a major arterial shunt between the internal and external carotid arteries.The OA provides anterior and posterior ethmoidal arteries that course through the anterior and posterior ethmoidal foramina, respectively.The anterior ethmoidal artery terminates as the external nasal artery which supplies the lateral nose.
Epistaxis
Published in John C Watkinson, Raymond W Clarke, Louise Jayne Clark, Adam J Donne, R James A England, Hisham M Mehanna, Gerald William McGarry, Sean Carrie, Basic Sciences Endocrine Surgery Rhinology, 2018
The internal carotid contributes the anterior and posterior ethmoidal branches of the ophthalmic artery. The anterior ethmoidal artery, after arising in the orbit, runs under the superior oblique muscle to the anterior ethmoidal canal in which it traverses the ethmoid and nasal cavities. It terminates in the region of the ethmoid fovea in a meningeal branch and a larger branch to the nasal roof, olfactory cleft and superior turbinate. The posterior ethmoidal artery is smaller than the anterior ethmoidal artery and is present in only 80% of individuals.7 Like the anterior vessel, this artery runs medially but this time passes above the superior oblique muscle to enter the posterior ethmoidal foramen situated 5 mm anterior to the optic canal and 10/15 mm behind the anterior ethmoidal foramen. Within its canal, the posterior ethmoidal artery is accompanied by the sphenoethmoidal nerve and a branch of the nasociliary nerve. This vessel also divides into a terminal meningeal branch and a branch to the posterosuperior nasal cavity, olfactory sulcus and sphenoethmoidal recess.
Surgical drainage of pediatric gas-containing orbital subperiosteal abscess
Published in Acta Oto-Laryngologica Case Reports, 2023
Tomoko Iwanami, Ryoji Kagoya, Keiichiro Isozaki, Ken Ito
Orbital infections are associated with multifactorial etiologies, including septicemia, facial trauma, cutaneous infections, and rhinosinusitis. Among them, rhinosinusitis is most prevalent and accounts for approximately 70% of all cases of orbital infections [5]. Anatomically, a close association exists between the orbit and the paranasal sinuses. Only a paper-thin bony plate separates the orbit from the ethmoid sinus. Moreover, the anterior and posterior ethmoidal foramen and the nerves and vessels that pass through the foramen serve as a route of transmission of infection from the ethmoidal sinuses to the orbit [6].
Sino-orbital desmoid tumor in a pediatric patient – Case report with review of literature
Published in Orbit, 2019
Mariel Angelou Parulan, Gangadhara Sundar, Yew Kwang Ong, Tseng Tsai Yeo, Victor Lee, Miriam Santiago Kimpo
We propose two theories to characterize the clinical and radiological behavior of growth of these neoplasms. Arising from fibrous tissue in the nasal cavity, it may have gradually crept into physiological fissures and foramina of the cribriform plate superiorly, or lamina papyracea laterally (anterior and posterior ethmoidal foramina) with resultant bony destruction. Another mechanism is through the destruction of adjacent bone secondary to a mass effect causing buckling of the nasal septum, lamina papyracea, maxilla, frontal, and sphenoid bones.
Vision loss associated with orbital surgery – a major review
Published in Orbit, 2020
Prerana Kansakar, Gangadhara Sundar
Along the medial orbital wall are the anterior and posterior ethmoidal neurovascular bundles and the optic nerve. The 24–12-6 mm rule is a useful guideline to determine orbital distances from the anterior lacrimal crest to the anterior and posterior ethmoidal foramen and the optic canal, respectively.96