Nasal Cavity And Orbit Flashcards
(29 cards)
Blood supply to and from the nose?
Ophthalmic and maxillary arteries and facial Vein
Nerve supply to the nose?
Ophthalmic and maxillary and olfactory nerve
Superior and middle conchae come from which bone?
Ethmoid bone and inferior conchae is individual.
How many nerves enter the olfactory bulb?
20
What is anosmia?
Loss or change of smell
Where do frontal sinuses drain into?
Frontonasal duct
Where do anterior and middle ethmoidal cells drain into?
Middle meatus
Where do posterior ethmoidal cells drain into?
Superior meatus
Where do sphenoidal sinuses drain into?
Sphenoethmoidal recess
Where do maxillary sinuses drain into?
Middle meatus
How many and which bones is the orbit made of?
Frontal zygomatic nasal lacrimal maxilla ethmoid Sphenoid
Which openings in the orbit?
Optic canal with second nerve and ophthalmic artery,
Superior orbital fissure Third fourth and sixth nerve
Inferior orbital fissure maxillary nerve of 5th
How many chambers of the eye?
Anterior to Iris has aqueous fluid
Posterior to Iris and anterior to lens has aqueous fluid
Vitreous chamber
Where does optic fibre run through?
Lateral geniculate nucleus
Swelling of which gland can impact the optic nerve?
Pituitary
What are the extra ocular muscles?
Levator palpebrae, Superior Oblique, inferior oblique, lateral rectus, inferior rectus, medial rectus and superior rectus
Which muscle causes the eye to look laterally and superior?
Inferior oblique
Which muscle causes the eye to look laterally and down?
Superior oblique
The oculomotor nerve supplies Which extra ocular muscles?
All except superior oblique and lateral rectus
How does the oculomotor nerve do parasympathetic input?
Via short ciliary nerves to ciliary body and sphincter pupillae
Which nerves supply superior oblique and lateral rectus?
Lateral rectus nerve six abducens, superior oblique nerve 4 trochlear
Oculomotor palsy?
Drooping of eyelid
Abducent nerve palsy?
Adducted eye
Horners syndrome?
Same side,Constriction of pupil,Dropping of eye, Redness of the skin, absence of sweating
Parasympathetic activity of oculomotor is unopposed
