Face 2 Flashcards
the eyelids have a medial and lateral ________
canthus
the ____________ elevates the upper lid
levator palpebrae superioris
_______ glands secrete a lubricating lipid secretion for the eyelids
meibomian (tarsal)
the ________ produces a lubricating mucus to prevent eyes from drying out
conjunctiva
the _______ conjunctiva is on the inner surface of the eyelid, and the _______ conjunctiva is on the anterior surface of the eye
palpebral -inner surface
bulbar - anterior surface of eyeball
lacrimal glands are located _____ and _____ to the eye
lateral and superior
the lacrimal _______ leads to the lacrimal _______, to the nasolacrimal duct, to the inferior nasal _____
canaliculi
lacrimal sacs
inferior nasal meatus
CN III (oculomotor n): LPS, SR, IR, MR, IO CN IV (trochlear n): \_\_\_\_\_\_ CN VI (abducens n): \_\_\_\_\_\_
superior oblique
lateral rectus
(LR6 SO4)3 means?
Lateral rectus -cn 6
Superior oblique -CN 4
all the rest are CN 3
the fibrous layer of the eye contains the _____ and _____
sclera and cornea
the vascular layer of the eye contains the _______ and the ______, and the iris
choroid and ciliary body
the muscles of the eye attach to the ________, which makes up the posterior 5/6 of eyeball
sclera
the cornea is transparent and makes up the front ______ of the eye
1/6
the ________ allows light to enter the eye and is _________
cornea
avascular
the cornea is innervated by ______
CN V1
the choroid is located between the _____ and the _____, and is HIGHLY vascular
choroid and the retina
the choroid has brown pigment which helps to ________
absorb light so it isn’t scattered in the eye
the ciliary body provides an attachment for the _____ and connects the choroid with the iris
lens
the iris is a thin, contractile diaphragm with circular ________ smooth mm fibers. the pupil transmits light to lens.
radial
the innermost layer is the _______, with a pigmented layer and a ______ layer - contains neurons, the _______, and the macula
optic disc
the neurons of the retina contain ____________, _________, and ganglion cells (axons form optic nerve)
photoreceptors (rods for dim light and peripheral vision, and cones for color vision and bright light)
bipolar cells -intermediate layer
the ________ are for peripheral vision
rods
cons are for __________ and bright light
color vision
the optic nerve exits the eye at the __________. This is the blind spot because there are no photoreceptors.
optic disc
the _________ is for enhanced visual acuity and contains mostly ______
macula
cones
the center of the macula is the ________, and is for the most _____ vision (only CONES)
fovea centralis
acute vision
the rods and cones are in direct contact with the chord, so they receive __________. The remaining retina is supplied via the opthalmic artery.
blood supply
the _____ chamber is between the cornea and the iris
anterior
the posterior chamber is between the _____ and the lens
iris
the posterior _______ is behind the lens and has _______
segment
vitreous humor
the lens is anchored by _____ fibers to ciliary processes
zonular
the tympanic membrane is covered with ____ externally and mucous membrane _____
skin
internally
most of the TM is the _____ part, the umbo is in contact with the end of the _______
tense (pars tensa)
malleolus
the auditory ossicles transmit ______ of TM to the ______
vibration
oval window
the ______ attaches to the TM, transmits to ____ and stapes. This changes a mechanical wave to electrical potential
malleus
incus
the _________ tube equalizes pressure between the middle and external ear and connects the nasopharynx to the _________
eustachian
middle ear cavity
the malleus is pulled by the _____ _____ muscle to reduce amplitude and prevent damage from loud sound
tensor tympani
the _______ muscle pulls stapes to prevent excessive movement
stapedius
chorda tympani is a branch of CN _____ and travels between the incus and malleus (also taste for 2/3 of tongue)
VII
chorda tympani joins the _____ of CN V3
lingual branch
the oval window is the _____ opening into the vestibule; the round window is the ____ opening into the chochlea (secondary TM)
superior
inferior
the bony labyrinth (surrounded by _______) is filled with _______. The membranous labyrinth is filled with _____
otic capsule
perilympth
endolymph
the bony labyrinth contains the _______, vestibule, and semicircular canals
cochlea
the vestibule of the bony labyrinth has the ____ window and is continuous with the _____ and semicircular canals. Has the _____ and ____, for balance with equilibrium receptors called _________
uioval
cochlea
uticle and sacclue
macula
organ of corti contains ______ which are hearing receptors
hair cells
what reports a change in the position of the head?
the cuticle and saccule of the vestibular labyrinth
the crista ampullaris of the _____________ respond to rotational movement
semicircular ducts
