Search results
Oct 31, 2020 · The orbital apex is the narrowest part of the orbit, housing the link between the intracranial cavity and orbit. Knowledge of orbital apex anatomy is crucial to selecting a surgical approach and reducing the risk of complications. Our purpose is to summarize ...
- Anatomy, Head and Neck, Orbit Bones - StatPearls - NCBI Bookshelf
The following seven bones form the orbit: The orbit is a...
- Anatomy, Head and Neck, Orbit Bones - StatPearls - NCBI Bookshelf
Nov 3, 2023 · The apex of the orbit is the optic foramen (canal), bound medially by the body of the sphenoid bone and laterally by the lesser wing of the sphenoid bone. It is medial to the superior orbital fissure. The optic foramen provides passage for the optic nerve (CN II) and ophthalmic artery to exit the skull.
- Content Manager
- 18 min
- Disease
- Anatomy
- Etiology
- Pathophysiology
- Signs/Symptoms
- Differential Diagnosis
Orbital apex syndrome (OAS) involves cranial neuropathies in association with optic nerve dysfunction. Orbital apex syndrome is symptomatically related to superior orbital fissure syndrome and cavernous sinus syndrome with similar etiologies. The distinction is the precise anatomic involvement of the disease process.
The orbital apex is anatomically the posterior part of the orbit positioned at the craniofacial junction located where the four orbital walls converge. The orbital apex incorporates the optic canal and the superior orbital fissure. The optic canal transmits the optic nerve (surrounded by meninges) and the ophthalmic artery to the cranial fossa. The...
Variety of etiologies and detailed history is important in narrowing the differential diagnosis. 1. Inflammatory 1.1. Sarcoidosis, SLE, Churg-Strauss syndrome, granulomatosis with polyangiitis , Tolosa Hunt Syndrome, Giant cell arteritis, Orbital inflammatory pseudotumor, thyroid orbitopathy, IgG4 related orbital myositis 2. Infectious – Most often...
In the orbital apex syndrome dysfunction of the optic nerve (II), oculomotor nerve (III), trochlear nerve (IV), abducens nerve (VI), and/or the ophthalmic branch of the trigeminal nerve (V1) may occur. The exact etiology is protean but may be generally divided into inflammatory, infectious, neoplastic, traumatic, and iatrogenic causes.
The most common initial manifestation of OAS is visual loss and ophthalmoplegia involving multiple cranial nerves
Superior Orbital Fissure Syndrome (SOFS)Cavernous Sinus Syndrome (CSS)Jun 25, 2024 · The orbit can be thought of as a pyramidal structure, with the apex pointing posteriorly and the base situated anteriorly. The boundaries of the orbit are formed by seven bones. It is also important to consider the anatomical relations of the orbital cavity – this is clinically relevant in the spread of infection, and in cases of trauma.
- (108)
This pyramid transforms into to a 3-sided posterior apex, because the orbital floor ends at the posterior basin of the inferior orbital fissure. Bony openings (canals, grooves, fissures, foramina, notches) provide the pathways for the neurovascular structures linking the intraorbital structures inside the periorbital sac to the cranial cavity, ethmoid and skull base, infratemporal fossa, and face.
- Carl Peter Cornelius, Florian Probst, Marc Christian Metzger, Peter J.J. Gooris
- 2021
Jul 24, 2023 · The following seven bones form the orbit: The orbit is a pear shape, with the optic nerve at the stem, and holds approximately 30 cc volume. The entrance to the globe anteriorly is approximately 35 mm high and 45 mm wide. The depth from orbital rim to the orbital apex measures 40 to 45 mm in adults. The maximum width is 1 cm behind the anterior ...
People also ask
What is orbital apex anatomy?
What are the two openings in the orbital apex?
What is the size of the orbital apex?
What is the most distinctive feature of the orbital apex?
Where is the apex of the eye located?
What are the bones and bony structures of the orbit?
The posterior margin of the orbital part articulates with the LWS, which forms a minor most posterior roof portion congruous with the roof of the apex. The posterolateral orbital part margin connects with the upper edge of the GWS along the sphenofrontal suture line (Fig. 2.7). The anterolateral orbital part brings up the zygomatic process and ...
