Nasal Cavity And Orbit

Question 1

Blood supply to and from the nose?

Answer 1

Ophthalmic and maxillary arteries and facial Vein

Question 2

Nerve supply to the nose?

Answer 2

Ophthalmic and maxillary and olfactory nerve

Question 3

Superior and middle conchae come from which bone?

Answer 3

Ethmoid bone and inferior conchae is individual.

Question 4

How many nerves enter the olfactory bulb?

Answer 4

20

Question 5

What is anosmia?

Answer 5

Loss or change of smell

Question 6

Where do frontal sinuses drain into?

Answer 6

Frontonasal duct

Question 7

Where do anterior and middle ethmoidal cells drain into?

Answer 7

Middle meatus

Question 8

Where do posterior ethmoidal cells drain into?

Answer 8

Superior meatus

Question 9

Where do sphenoidal sinuses drain into?

Answer 9

Sphenoethmoidal recess

Question 10

Where do maxillary sinuses drain into?

Answer 10

Middle meatus

Question 11

How many and which bones is the orbit made of?

Answer 11

Frontal zygomatic nasal lacrimal maxilla ethmoid Sphenoid

Question 12

Which openings in the orbit?

Answer 12

Optic canal with second nerve and ophthalmic artery,
Superior orbital fissure Third fourth and sixth nerve
Inferior orbital fissure maxillary nerve of 5th

Question 13

How many chambers of the eye?

Answer 13

Anterior to Iris has aqueous fluid
Posterior to Iris and anterior to lens has aqueous fluid
Vitreous chamber

Question 14

Where does optic fibre run through?

Answer 14

Lateral geniculate nucleus

Question 15

Swelling of which gland can impact the optic nerve?

Answer 15

Pituitary

Question 16

What are the extra ocular muscles?

Answer 16

Levator palpebrae, Superior Oblique, inferior oblique, lateral rectus, inferior rectus, medial rectus and superior rectus

Question 17

Which muscle causes the eye to look laterally and superior?

Answer 17

Inferior oblique

Question 18

Which muscle causes the eye to look laterally and down?

Answer 18

Superior oblique

Question 19

The oculomotor nerve supplies Which extra ocular muscles?

Answer 19

All except superior oblique and lateral rectus

Question 20

How does the oculomotor nerve do parasympathetic input?

Answer 20

Via short ciliary nerves to ciliary body and sphincter pupillae

Question 21

Which nerves supply superior oblique and lateral rectus?

Answer 21

Lateral rectus nerve six abducens, superior oblique nerve 4 trochlear

Question 22

Oculomotor palsy?

Answer 22

Drooping of eyelid

Question 23

Abducent nerve palsy?

Answer 23

Adducted eye

Question 24

Horners syndrome?

Answer 24

Same side,Constriction of pupil,Dropping of eye, Redness of the skin, absence of sweating

Parasympathetic activity of oculomotor is unopposed

Question 25

The nasolacrimal duct drains where?

Answer 25

Inferior meatus

Question 26

Innervation to lacrimal gland?

Answer 26

Sensory- trigeminal opthalmic
Parasympathetic- facial
Sympathetic- sup.cervical ganglion- internal carotid

Question 27

Which nerve doesnt exit through superior orbital fissure?

Answer 27

Optic

Question 28

What is the role of meatuses?

Answer 28

Increase surface area and humidify inspired air

Question 29

What is the role of paranasal sinuses?

Answer 29

Air filled cavities which can produce mucus