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Questions and Answers
What forms the base of the bony orbit?
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?
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?
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?
Which fissure provides communication between the bony orbit and the middle cranial fossa?
Which bone forms the orbital process of zygomatic bone?
Which bone forms the orbital process of zygomatic bone?
Where is the infraorbital rim located?
Where is the infraorbital rim located?
What does the medial wall of the eye socket border?
What does the medial wall of the eye socket border?
Which branch of which cranial nerve passes through the sphenopalatine foramen to provide sensory innervation to the ant part of the palate?
Which branch of which cranial nerve passes through the sphenopalatine foramen to provide sensory innervation to the ant part of the palate?
Which fissure provides communication between the bony orbit and the pterygopalatine & infratemporal fossae?
Which fissure provides communication between the bony orbit and the pterygopalatine & infratemporal fossae?
What is located close to the posterior aspect of the bony orbit?
What is located close to the posterior aspect of the bony orbit?
Which part of the lacrimal gland is controlled by the superior and inferior rectus muscles?
Which part of the lacrimal gland is controlled by the superior and inferior rectus muscles?
What is the function of the common tendinous ring in the orbit?
What is the function of the common tendinous ring in the orbit?
What is the main cause of Horner's Syndrome?
What is the main cause of Horner's Syndrome?
Where are the smooth muscles located in the eye anatomy?
Where are the smooth muscles located in the eye anatomy?
Which nerve carries parasympathetic fibers from the pterygopalatine ganglion to the lacrimal gland?
Which nerve carries parasympathetic fibers from the pterygopalatine ganglion to the lacrimal gland?
What surrounds the orbital part of the lacrimal gland?
What surrounds the orbital part of the lacrimal gland?
Which vessel supplies the orbital part of the lacrimal gland?
Which vessel supplies the orbital part of the lacrimal gland?
Where does the Nasociliary Nerve enter the orbit?
Where does the Nasociliary Nerve enter the orbit?
Where do extraocular muscles originate from?
Where do extraocular muscles originate from?
What innervates the smooth muscles located in the tarsal plate of the upper and lower eyelids?
What innervates the smooth muscles located in the tarsal plate of the upper and lower eyelids?
What is the main function of the eyelids?
What is the main function of the eyelids?
Which structure passes through the maxilla and exits as the infraorbital foramen?
Which structure passes through the maxilla and exits as the infraorbital foramen?
What can occur due to trauma in the thin, fragile medial bony wall of the orbit?
What can occur due to trauma in the thin, fragile medial bony wall of the orbit?
What is the main component of the roof of the eye socket?
What is the main component of the roof of the eye socket?
Which nerve innervates the eyelids?
Which nerve innervates the eyelids?
What attaches to the medial orbital margin and lacrimal bone?
What attaches to the medial orbital margin and lacrimal bone?
What is the main function of adipose tissue in the orbit?
What is the main function of adipose tissue in the orbit?
What is the primary function of neurovasculature within the orbit?
What is the primary function of neurovasculature within the orbit?
What do tarsal plates contribute to in the eyelids?
What do tarsal plates contribute to in the eyelids?
What structures are included in the orbit?
What structures are included in the orbit?
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.
