Chapter 18 - The Sensory System Flashcards
Proprioception
Awareness of body position
Gustation
Taste
Olfaction
Smell
-esthesia
Sensation
-algesia
Pain
-osmia
Sense of smell
-guesia
Sense of taste
Pinna
Outermost portion of the ear
Tympanic membrane
Ear drum
Cerumen
Ear wax that protects the ear and prevents infection
Ossicles
3 small bones of the middle ear
3 bones of the middle ear
Malleus, incus, stapes
Vestibular apparatus
Where the sense of equilibrium is localized
Audi/o
Hearing
Acoid, acus, cus
Sound, hearing
Ot/o
Ear
Myring/o
Tympanic membrane
Tympan/o
Tympanic cavity, middle ear, tympanic membrane
Salping/o
Tube, auditory tube
Staped/o, stapedi/o
Stapes
Labryinth/o
Labyrinth, inner ear
Vestibul/o
Vestibule, vestibular apparatus
Cochle/o
Cochlea of the inner ear
Sensorineural hearing loss
Results from damage to the inner ear, 8th cranial nerve or central auditory pathways.
Otits
Any inflammation of the ear.
Otitis media
Infection that leads to fluid accumulation in the middle ear cavity.
Myringotomy
Incision and placement of a tube in the tympanic membrane
Otitis externa
Inflammation of the external auditory canal. Commonly called swimmers ear.
Otosclerosis
Bony structure of the inner ear deteriorates and then reforms into spongy bone tissue that may eventually harden.
Stapedectomy
Surgical removal of the stapes and a prosthetic bone is inserted.
Meniere disease
Affects the inner ear. Seems to involve the production and circulation of fluid.
Acoustic neuroma
Tumor that arises form the sheath of the 8th cranial nerve.
Palpebrae
Eyelids
Lacrimal gland
Creates tears
Conjunctiva
Thin membrane that lines the eyelids and anterior portion of the eye
Sclera
White of the eye. Tough surface protective layer
Uvea
Middle layer composed of 3 parts
Chordid
Vascular and pigmented layer of the Uvea. Located in the posterior portion of the eyeball. Provides nourishment for the retina.
Ciliary body
Contains muscle that controls the shape of the lense. Process called accommodation.
Iris
Muscular ring that controls the size of the pupil.
Retina
Innermost layer of the eye and the actual visual receptors. Two specialized cells: rods and cones.
Rods
Function in dim light, provide low visual acuity and do not respond to color
Cones
Active in bright light, high visual acuity and respond to color.
Fovea
Tiny depression in the retina near the optic never with a high concentration of cones. Area of highest visual acuity.
Vitreous body
Jelly like filling of the eye that refracts light.
Aqueous humor
Fluid that fills the anterior of the lense. Maintains the cornea’s shape and refracts light.
Blephar/o
Eyelid
Palpebr/o
Eyelid
Dacry/o
Tear, lacrimal apparatus
Dacryocyst/o
Lacrimal sac
Lacrim/o
Tear, lacrimal sac
Opt/o
Eye, vision
Ocul/o
Eye
Opthalm/o
Eye
Scler/o
Sclera
Corne/o
Cornea
Kerat/o
Cornea
Lent/I
Lense
Phak/o, phac/o
Lens
Uve/o
Uvea
Chori/o, choroid/o
Choroid
Cycl/o
Ciliary body, ciliary muscle
Ir, irit/o, irid/o
Iris
Pupill/o
Pupil
Retin/o
Retina
-opsia
Condition of vision
-opia
Condition of the eye, vision
Myopia
Nearsightedness. Eyeball is to long.
Hyperopia
Farsightedness. Eyeball is to short and images form behind the retina.
Presbyopia
Shortening of the eye due to aging.
Astigmatism
Irregularity in the cornea or the lens that distorts light entering the eye and blurs vision.
Conjunctivitis
Inflammation of the conjunctiva. Pink eye
Trachoma
Inflammation of the conjunctiva and cornea caused by chlamydia trachomatis.
Ophthalmia neonatrum
Acute conjunctivitis in newborns.
Retinal detachment
Separation of the retina from the choroid.
AMD
Age related macular degeneration. Can be wet or dry.
Dry AMD
Material accumulates on the retina.
Wet AMD
Abnormal blood vessels grow under the retina that cause it to detach.
Diabetic retinopathy
Caused by circulatory issues due to diabetes mellitus
Cataract
Opacity of the lens of the eye.
Phacoemulsification
Extraction of the lens after high frequency ultrasound
IOL
Intraocular lens
Glaucoma
Abnormal pressure within the eyeball
Amblyopia
Lazy eye
Anisocoria
Pupils are not the same size
Emmetropia
Normal condition of the eye in refraction.
Blepharoptosis
Dropping of the eyelid
Chalazion
Small mass on the eyelid
Drusen
Small growths that appear as yellowish spots beneath the retina.
Hordeolum
Inflammation of the sabeceous gland. A sty
Keratconus
Conical protrusion of the corneal center
Miosis
Abnormal contraction of the pupils
Mydriasis
Pronounced or abnormal dilation of the pupils
Nyctolopia
Night blindness
Nystagmus
Rapid involuntary rhythmic movements of the eyeball
Papilledema
Swelling of the optic disk
Phlyctenule
A small blister or nodule on the cornea or conjunctiva
Pseudophakia
Cataractous lens is removed and replaced with a plastic lens implant.
Retinitis
Inflammation of the retina
Scotoma
Area of diminished vision within the visual field.
Strabismus
Deviation of the eye in which the visual lines of each eye are not directed at the same object.
Synechia
Adhesion of parts