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90 Cards in this Set

  • Front
  • Back
palpebrae
eyelids
tarsal plates
thick CT that gives eyelid their shape
conjunctiva
mucous membrane that is facing eyeball and covering eyeball

stratified squamous epithelium (non-kt)
orbicularis oculi
facial nerve

closes eye
lens
focuses light on the retina
lacrimal apparatus
tear circulation.production
lacrimal gland
makes tears
lacrimal puncta
little holes medially in eye that absorb tears
lacrimal canals (canaliculi)
inferior and superior ducts that run from the puncta to the sac
larimal sac
medial sac that fills with tears
nasolacrimal duct
drains tears into the nasal cavity
lacrimal gland production to excretory ducts to eye surface through lacrimal puncta into superior and inferior lacrimal canals into lacrimal sac through nasolacrimal canal into nasal cavity
flow of tears
levator palpebrae superioris

oculomotor
elevates the eye lid

nerve?
superior rectus-oculomotor
superior muscle that directs eye upward

nerve?
inferior rectus-oculomotor
superior eye muscle that directs eye straight downward

nerve?
lateral rectus-abducens
lateral eye muscle that directs eye laterally


nerve?
medial rectus-oculomotor
medial eye muscle that directs eye medially

nerve?
inferior oblique-oculomotor
moves the eye lateral and UP

runs laterally to medially underneath the eye

nerve?
superior oblique-trochlear
runs through the trochlea and turns the eye laterally and DOWN

nerve?
trochlea
pulley structure in eye that the sup. oblique runs through (cartilagenous)
mechanical support, protection, attachment of muscles. also assis in focusing (cornea and sclera)
fibrous tunic function
cornea
transparent layer on outside of the eye
sclera
dense fibrous CT on the outside of the eye that gives it it's WHITE color
root for BV lymph transport to and from eye. also regulates entering light and circulates aqueous humor
vascular tunic
choroid
dark layer that has melanocytes and blood vessels
iris
colored part of the eye that contains BV and smooth muscle cells
pupillary dialators
SPOKE muscle in iris that open up the pupil
pupillary constrictors
circular muscles that constrict the pupil
pupil
central opening in iris
ciliary body
begins at the junction between the cornea and sclera and functions in accommodation and aqueous humor production
ciliary muscle
muscular ring that projects into the interior of the eye that regulates flow of aqueous humor into the canal of schlemm. helps with accommodation
ciliary processes
folds of muscles that go towards the lends that are attaced to suspensory ligaments
suspensory ligaments
tie ciliary body to lends and help with contraction and changing the shape of the lens
retina
area that contains photoreceptors BV and processin neurons
macula lutea
bigger area where there are no rods

high visual acuity
fovea centralis
area in eye that has the highest concentration of cones
optic disc
where the optic nerve enters the retina, the "blind spot"
anterior cavity
area from cornea to lens that contains aqueous humor
anterior chamber of anterior cavity
cornea to iris area
posterior chamber of anterior cavity
iris to lens
posterior cavity
also known as the vitreous chamber which is everything that is posterior to the lens
vitreous humor
more viscous jelloey liquid in the eye that fills the posterior cavity
when an object is brought close to our eye the ciliary muscles will contract the suspensory ligaments will relax and as a result the lens will become thicker and focus light sooner

NCST:

ciliary muscles tighten
slacening of suspensory ligaments
thickening of lends
accomodation (NEAR)
FRTT

relax ciliary muscles
thinning of the lends
tightening of suspensory ligaments
accommodation (FAR)
reduction in lens transparancy that causes visual impairment
cataracts
tissue removal muscle be quickly and these are very common because there are no BV here and there likely won't be any WBC
corneal transplants
nearsightedness where the image forms too early

eyeball is too long

concave lens
myopia
farsightness

focal point is behind the retina

eyeball is too short

convex lens
hyperopia
aqueous humor overprodution

cannot drain enough through the canal of schlemm

blindness can occur if not fixed
glaucoma
abnormal blind spots that are fixed in position
scotoma
chronic conjunctivitis that is caused by a viral or bacteral invasion of conjunctiva

treatment is antibiotics
trachoma
infection of a sebaceous gland, a tarsal gland or a sweat gland that causes swelling
sty
ciliary process of ciliary body production to posterior chamber of anterior cavity through the pupil into the anterior chamber of anterior cavity out through the canal of schlemm
pathway of aqueous humor
made of elastic catilage that focuses soundwaves into the inner ear
pinna/auricle
tympanic membrane
first part of the middle ear made of CT that vibrates to conduct sound
auditory ossicles
malleus incus and stapes are all called....
malleus
the first ear bone in contact with the tympanum
incus
the second middle ear bone
stapes
this middle ear bone attaches to the inner ear via the oval window
tensor tympani-mandibular branch of the trigeminal
muscle on TOP of the middle canal that runs from the petrousregion of the temporal bone to the maleus

nerve?
stapedius muscle-facial nerve
muscle that runs on the posterior wall of the middle ear and connects to the stapes

contraction of this muscle causes the stapes to vibrate less and as a result less sound is conducted into the middle ear

nerve?
eustachian tube (auditory tube)
tube that connects to the nasopharynx that equalizes pressure between the middle ear and the atmosphere
bony labyrinth
this is filled with perilymph and is a osseuous membrane that is fused with the temporal bone
semicircular canals
rings in the inner ear that are involved in equilibrium and balance
up and down FRONT semicircular canal that senses a "yes" motion
anterior semicircular canal
up and down BACK semicircular canal that senses a cartwheel like motion
posterior semicircular canal
side to side running semicircular canal that senses a no head motion
lateral semicircular canal
ampullae
bulges on the bottom of the semicircular canals where there are a lot of sensory receptors
vestibule
bulge where all of the semicircular cnal rings come together
cochlea
snail shaped structure that is actually involved in hearing
filled with endolymph and has a higher potassium and lower sodium
membranous labyrinth (composition inside?)
semicircular ducts
ducts that are inside the semicircular canals
urticle
bulge on the vestibule that is CLOSER to the semicircular canals


senses gravity and linear acceleration
saccule
bulge on the vestibule that is CLOSER to the cochlea

senses gravity and linear acceleration
cochlear duct
membranous labyrinth that spirals upward
round window
on the inferior vestibule which marks the end of the sound pathway
oval window
covered be the stapes on the vestibule and marks the beginning of the inner ear
auricle to external auditory canal to tympanum. then malleus, incus, stapes to the oval window. moves the perilymph in the vestibular duct which moves the endolymph in the cochlear duct which moves the hair cells in the organ of corti. vibrations then dissappate out the round window in the tympanic duct
pathway of sound
middle ear infection where eardrum is pressed on by bacteria or a virus
otitis media
middle ear problems from scarring, a hole in the eardrum, or wax/water trapped.

these block normal transfer from eardrum to oval window
conductive deafness
problem within cochlea or nerve pathway where either the receptors cannot respond to stimulation or signal can be transferred to brain
nerve deafness
insertion of electrodes into cochlear nerve to provide external stimulation that provides some sensitivity to sounds in the absense of a funtional organ of corti
cochlear implant
ringing in the ear caused by vestibulocochlear nerve
tinnitus
abnormal endolymph production that causes damage to nucleous or tracts of the vestibular nerve. may rupture membrand and mix endo and peri so there are highly stimulated receptors causes intense spinning or rolling feelins
Meniere's disease
infection of the mastoid process often caused by untreated otitis media

treated with antibiotics
mastoiditis
automatic eye movements that occur in response to sensations of movement controlled by superior colliculi

after damage to brainstem these can occur in stationary individuals
nystagmus
drainage of middle ear into surgical opening in tympanic membrane

treatment for otitis media
myringotomy
most common cause of vertigo.

symptoms are headache, sweating, flushed fae, nausea, vomitting
motion sickness
inappropriate sense of motion caused by CNS infections or other infections
vertigo
deadening of sounds by the tensory tympany and stapedius muscles contraction

tensor tympany pulls on the tympanum and reduces its vibrations

the stapedius will pull on the stapes and prevens its some of its vibration on the oval window
attenuation reflex