ch. 6 sensory sys: opthamology and otolaryngology Flashcards
brain
receives sensory information (sight, sound,
smell), processes it, and integrates it into one
experience.
Sensory organs and cells are located throughout the
body.
Eye
The major function of the eye is to provide sight. Sits in a bony socket The socket protects the eye. Is kept moist by tears Needed for proper functioning Is protected by the eyelid Helps keep the eye moist Protects eye from dust and other particles Covered by a thin, clear membrane: the conjunctiva
Ocul/o,
ophthalm/o, opt/o
eye
Lacrim/o, dacry/o
tear
-opia, -opsia
vision
Blephar/o
eyelid
Corne/o, kerat/o
cornea
Conjunctiv/o
LOOK UP
Scler/o
LOOK UP
Sclera
white part of eye
Cornea
Clear surface in the middle of the eye
Choroid layer
•Lens – bends the light rays
•Iris – colored area, controls the size of the pupil
•Ciliary muscles attach to the lens and bend it for
focusing.
Retina
•Deepest layer of the eye
•Contains cells that turn into electric signals that are
sent to the brain via the optic nerve
Vitre/o
•Vitreous liquid, jelly stuff in the eye
Cycl/o
the ciliary body– part that bends lens
Retin/o
retina
Ir/o, irid/o
iris
Phac/o, phak/o
lens
Ears
turn sound into electrical signals
Ears collect sounds.
They turn energy created from sound waves into
electrical signals.
Signals are sent to the brain which interprets the
signals into hearing.
Aur/o
Ot/o
ear
Acous/o,
audi/o
sound or hearing
-acusis
hearing condition
3 div of ear
There are three divisions of the ear: outer, middle, and
inner.
Outer ear
Pinna
Ear canal
The tympanic membrane (eardrum) separates the outer
ear from the middle ear.
The middle ear starts at the tympanic membrane.
It is a space that contains tiny bones.
Incus, malleus, and stapes
These tiny bones carry the vibrations from the tympanic
membrane to the inner ear
Cerumin/o
ear wax
Salping/o
ustation tube LOOK UP
Tympan/o, myring/o
ear drum
Mastoid/o
mastoid process LOOK UP
Cochlea
The inner ear begins with the entrance to the cochlea. The cochlea is a bony shell filled with fluid
and hair.
When sound waves are transferred to the fluid
within the cochlea, the fluid moves and
vibrates tiny hairs attached to a membrane.
The tiny hairs vibrate, creating electrical
signals that travel down the acoustic nerve to
the brain.
Vestibular System
The ear helps maintain balance Canals filled with fluid and hair Sends information to the brain about the tilt, rotation, and motion of the head This allows the brain to coordinate movement with the eyes.
Labyrinth/o
labyrinth, cochlea and vestibular system
Vestibul/o
vestibule, area in front of semicircular canals (3 diff plane orientations)
Cochle/o
cochlea, part of inner ear, hearing receptors here
Common complaints w eyes
Changes in vision Relating to tear glands Problems with eyelids Eye pain Pupil size
Akinetopsia
inability to see objects in motion
Ambiopia, diplopia
double vision
Amblyopia
decreased vision, lazy eye
Asthenopia
weak vision, eye strain
Hemianopsia
blindness in half of visual field
Hyperopia
far sightedness
Myopia
near sightedness
Presbyopia
decreased vision secondary to old age
Scotopia
adjustment of the eye to see in darkness
Blepharoplegia
paralysis of eyelids
Blepharospasm
involuntary contraction of eyelids
Dacryoadenalgia
pain of tear gland
Dacryocystalgia
pain in tear sac
Dacryohemorrhea
excessive flow of blood in tears
Dacryorrhea
excessive tearing
Xerophthalmia
dry eye
Ophthalmalgia
eye pain
Ophthalmoplegia
eye paralysis
Astigmatism
depth perception problems, when light rays dont focus on a single point in back of eye
Corneal xerosis
dry cornea
Keratalgia
pain in the cornea
Miosis
abormal contraction of pupil
Mydriasis
abnormal dilation of pupil
Iridalgia
pain in the iris
Cycloplegia
paralysis of ciliary body
Scotoma
any dark spot in visual field
Common hearing complaints
Changes in hearing
Ear pain/mastoid pain
Changes in balance
Hyperacusis
excessively sensitive hearing
Hypoacusis
excessively insensitive hearing
Osteoacusis
hearing through bone
Presbycusis
declining hearing due to old age
Mastoidalgia
pain of the mastoid behind ear slightly to bottom pointy part
Otalgia, otodynia
pain in the ear
Otorrhea
discharge from ear (earwax– cerrumen, blood)
Tinnitus
ringing of the ears
Vertigo
sensation of moving through space while stationary
eye observation and discovery
The eye
Examination mainly performed visually in a
systematic manner
Examination includes the eyelids and the eye
itself
Specialized tools for further inspection
ear observation and discovery
The ear
Visual examination of the outer part of the ear
Examination of the outer/middle ear via
otoscopy
Ear canal
Tympanic membrane
Ophthalmologist
eye specialist specializing in diseases and conditions of eye
Optometrist
specializes in measuring in eye
Ophthalmoscope
instrument for looking at eye
Optomyometer
device for strength of eye
Phacoscope
instrument used to look at lens
Retinoscope
instrument used to look at retina
Tonometer
measures tension or pressure in eye looking for glaucoma
Retinoscopy
procedure for looking at retina
binocular
pertaining to both eyes
Iridokinesis
pertaining to movement of iris
Lacrimation
pertaining to formation of tears
Nasolacrimal
pertaining to the nose and tear ducts
Ophthalmic, optic
pertaining to the eye
Optokinetic
pertaining to eye movement
Retinal
pertaining to retina