Bony Orbit & Accessory Structures Quiz

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Questions and Answers

What forms the base of the bony orbit?

Anteriorly the lacrimal crests, posteriorly the greater wing of the sphenoid

Anteriorly the ethmoidal foraminae, posteriorly the frontal bone

Anteriorly the optic canal, posteriorly the zygomatic bone

Anteriorly the orbital margin, posteriorly the lesser wing of the sphenoid (correct)

What forms the walls of the bony orbit?

Parietal, occipital, nasal, mandible, vomer

Temporal, lacrimal, palatine, frontal, zygomatic

Frontal, maxilla, zygomatic, ethmoid, sphenoid (correct)

Ethmoid, sphenoid, parietal, temporal, lacrimal

Which structure separates the bony orbit from the temporal fossa?

Orbital process of palatine

Lacrimal bone

Greater wing of sphenoid (correct)

Orbital part of zygomatic bone

Which fissure provides communication between the bony orbit and the middle cranial fossa?

Superior orbital fissure Signup and view all the answers

Which bone forms the orbital process of zygomatic bone?

Maxilla Signup and view all the answers

Where is the infraorbital rim located?

Zygomatic bone & maxilla Signup and view all the answers

What does the medial wall of the eye socket border?

Ethmoid air cells & nasal cavity Signup and view all the answers

Which branch of which cranial nerve passes through the sphenopalatine foramen to provide sensory innervation to the ant part of the palate?

Branch of trigeminal nerve (CN V) Signup and view all the answers

Which fissure provides communication between the bony orbit and the pterygopalatine & infratemporal fossae?

Inferior orbital fissure Signup and view all the answers

What is located close to the posterior aspect of the bony orbit?

Middle cranial fossa & pterygopalatine fossa Signup and view all the answers

Which part of the lacrimal gland is controlled by the superior and inferior rectus muscles?

Palpebral part Signup and view all the answers

What is the function of the common tendinous ring in the orbit?

Allows passage of nerves, arteries, and veins Signup and view all the answers

What is the main cause of Horner's Syndrome?

Damage to the superior cervical sympathetic ganglion or its fibers Signup and view all the answers

Where are the smooth muscles located in the eye anatomy?

Tarsal plate of the upper and lower eyelids Signup and view all the answers

Which nerve carries parasympathetic fibers from the pterygopalatine ganglion to the lacrimal gland?

Lacrimal Nerve Signup and view all the answers

What surrounds the orbital part of the lacrimal gland?

Tenon's capsule and sclera Signup and view all the answers

Which vessel supplies the orbital part of the lacrimal gland?

Ophthalmic artery Signup and view all the answers

Where does the Nasociliary Nerve enter the orbit?

Through the common tendinous ring Signup and view all the answers

Where do extraocular muscles originate from?

Common Tendinous Ring (Zinn) Signup and view all the answers

What innervates the smooth muscles located in the tarsal plate of the upper and lower eyelids?

Superior cervical ganglion Signup and view all the answers

What is the main function of the eyelids?

To provide protection, lubrication, and maintain vision through blinking Signup and view all the answers

Which structure passes through the maxilla and exits as the infraorbital foramen?

Infraorbital sulcus Signup and view all the answers

What can occur due to trauma in the thin, fragile medial bony wall of the orbit?

Blow out fractures Signup and view all the answers

What is the main component of the roof of the eye socket?

Both a and b Signup and view all the answers

Which nerve innervates the eyelids?

Facial nerve (CN VII) Signup and view all the answers

What attaches to the medial orbital margin and lacrimal bone?

Orbicularis oculi muscle Signup and view all the answers

What is the main function of adipose tissue in the orbit?

To provide cushioning and support for the eyeball Signup and view all the answers

What is the primary function of neurovasculature within the orbit?

To supply nutrients and oxygen to the eyeball and surrounding structures Signup and view all the answers

What do tarsal plates contribute to in the eyelids?

Structural support and stability Signup and view all the answers

What structures are included in the orbit?

Eyeball, adipose tissue, neurovasculature, accessory eye structures, and eyelids Signup and view all the answers

Study Notes

Selçuk Sürücü discussed the anatomy of the eye socket and structures within it
Roof of eye socket is also floor of maxillary sinus and parts of frontal sinus
Infraorbital sulcus passes through the maxilla and exits as infraorbital foramen
The infraorbital foramen is the passage for a branch of the maxillary nerve
Blow out fractures can occur in the thin, fragile medial bony wall of the orbit due to trauma
Structures in the orbit include the eyeball, adipose tissue (orbital fat body), neurovasculature, accessory eye structures, and eyelids
Eyelids provide protection, lubrication, and maintain vision through blinking
Eyelids consist of the palpebral, lacrimal, and orbital parts of the orbicularis oculi muscle
The orbicularis oculi muscle attaches to the medial orbital margin, medial palpebral ligament, and lacrimal bone
Eyelids are innervated by the facial nerve (CN VII) and have tarsal plates and Meibomian glands.

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Description

Test your knowledge about the bony orbit and its accessory structures with this quiz. The quiz covers the anatomy of the bony orbit, including its walls and base, as well as the related bones and foraminae.

Bony Orbit &amp; Accessory Structures Quiz