Axial Orbit Anatomy at Anatomy

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Axial Orbit Anatomy. The bony orbit is a conical structure with the apex pointing posteriorly. The orbital cavities, situated between the cranium and facial skeleton, are separated from each other by the nasal cavity and the ethmoidal and sphenoidal air sinuses ( fig.

Orbital apex anatomy CT. Axial and coronal CT slices
Orbital apex anatomy CT. Axial and coronal CT slices from www.researchgate.net

The medial wall is composed of the frontal process of the maxillary bone anteriorly, the lamina papyracea of the ethmoid air cells at the midportion, and the sphenoid bone posteriorly. The lateral orbital wall forms a 45° angle to its medial wall counterpart. Axial scan obtained by directing the sound beam across the visual axis through the cornea and lens.

Orbital apex anatomy CT. Axial and coronal CT slices

With the exception of the skull, the bones of the skeleton weaken as it ages. The divergent axis of each orbit thus becomes half of 45 degrees or 22.5 degrees. G = globe, ir = inferior rectus, ss = sphenoid sinus, tf = temporal fossa, 1 = inferior orbital fissure, 2 = petrous bone, 3 = zygomatic bone, 4 = sphenoid bone, 5 = nasal septum, 6 = temporal bone, 7 = internal carotid artery. Anatomical structures and specific areas are visible as interactive labeled images.