Anatomy

Question 1

what nerve supplies the upper eyelid?

Answer 1

CN V1

Question 2

what nerve supplies the lower eyelid?

Answer 2

CN v2

Question 3

what nerve supplies the ala of the nose, upper lip…

Answer 3

CN V2

Question 4

what nerve carries the afferent limb of the blink reflex

where does it go to?

Answer 4

CN V1

pons, via the trigeminal ganglion

Question 5

what nerves form the first part of the afferent limb of the blink reflex?

Answer 5

the long ciliary nerves

Question 6

nerve controlling efferent limb of blink reflex

Answer 6

CN VII

Question 7

what carries sympathetic axons to the orbit?

Answer 7

the ophthalmic artery

Question 8

where do all presynaptic parasympathetic axons lave the CNS from

Answer 8

CNs III, VII, IX, X and sacral spinal nerves

Question 9

what nerve supplies the lacrimal gland?

Answer 9

CN VII

Question 10

nerve supply to submandibular, sublingual, parotid salivary glands?

Answer 10

CN VII to submandibular and sublingual

CN IX to parotid

Question 11

what do sacral spinal nerves carry parasympathetics to

Answer 11

handgun, pelvis and perineum

Question 12

what does superior branch of CN III supply

Answer 12

superior rectus and levator palpebral superiors

Question 13

True or False: parasympathetics travel only in the long ciliary nerve

Answer 13

false

they only travel in the short ciliary nerve

Question 14

what type of nerves synapse in the ciliary ganglion?

Answer 14

parasympathetics

Question 15

the ciliary nerves supply autonomic axons to control the diameter of the iris (and pupil) and the refractive shape of the lens

Answer 15

for info

Question 16

nerve connections in the oculocardiac reflex

Answer 16

V1 and X

Question 17

sympathetic functions - to get more or less light into eyes?

Answer 17

open eyes wider so more light in

Question 18

fixed dilated pupil

Answer 18

CN 3 pathology

Question 19

do the ciliary muscles relax or contract in far vision

Answer 19

they relax in far vision so the ligament tightens and the lens flattens

Question 20

where do the suspensory ligaments attach from/to

Answer 20

ciliary body to lens

Question 21

reflex tears

afferent and efferent limbs?

Answer 21

afferent = CN VI 
efferent = CN VII

Question 22

other name for base of the orbit

Answer 22

orbital rim

Question 23

where in the orbit is the apex?

Answer 23

back of the orbit (optical canal)

Question 24

eyelid muscles closest to eye

Answer 24

superior and inferior tarsi

Question 25

what do tarsal glands secrete? why?

Answer 25

lipid

to prevent tears from overflowing

Question 26

name of where tears pass into

Answer 26

punctum

Question 27

where do tears eventually end up?

Answer 27

inferior meatus

Question 28

vascular layer of the eye

Answer 28

uvea

Question 29

3 parts of the uvea

Answer 29

iris
ciliary body
choroid

Question 30

choroid contains?

Answer 30

all the vessels

Question 31

2 parts of anterior segment of the eye

Answer 31

anterior and posterior chamber
anterior - between cornea and iris
posterior - between iris and suspensory ligaments

Question 32

what produces aqueous humour

Answer 32

ciliary body

Question 33

where is aqueous reabsorbed

at what?

Answer 33

scleral venous sinus (canal of schlemm)

at the iridocorneal angle

Question 34

venous drainage of the superior and inferior ophthalmic veins

Answer 34

cavernous sinus via the superior orbital fissure

inferior ophthalmic drains mainly into the superior ophthalmic

Question 35

where is the choroid plexus?

Answer 35

3rd, 4th and lateral ventricles

Question 36

what ions conc is higher in the choroid plexus than blood plasma

Answer 36

Na and Cl

Question 37

how does the CSF return to venous blood

Answer 37

through arachnoid granulations in the superior saggital sinus

Question 38

does the aqueous humour contain a buffer?

Answer 38

YES

bicarbonate