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Sensory system

The five senses Pain Touch Pressure Temperature Proprioception
Proprioception Awareness of body position
The special senses Gustation (taste) Olfaction (smell) Hearing Equilibrium Vision
Sensory receptor Sensory nerve ending that responds to a stimulus
What is the function of the sensory system? Maintain homeostasis Provide pleasure Protection from harm
-esthesia Sensation
-osmia Smell
-geusia Taste
The ear is responsible for? Hearing and equilibrium
Parts of the outer ear Pinna (actual ear) External auditory canal Tympanic membrane (eardrum)
Tympanic membrane Transmits sound waves to the middle ear; eardrum
Cerumen Earwax; protects ear and prevents infection
Ossicles(bones) of middle ear Malleus, incus, stapes
Auditory tube Eustachion tube; connects middle ear with nasopharynx and equalizes pressure in the ear
Inner ear Labyrinth; filled with fluid Cochlea Vestibular apparatus Semicircular canals
Cochlea Coiled part of the inner ear; sound vibrations convert into nerve impulse
Spiral organ Transfers vibrations from cochlear duct and sends to auditory nerve
Vestibular apparatus Sense of equilibrium; consists of vestibule and semicircular canals
Vestibulocochlear nerve 8th cranial nerve, auditory nerve
Pinna/ auricle Captures sound waves; ear part of the ear
Vestibule Liquid filled chamber; aids in equilibrium
Audi/o Hearing
Acous, acus, cus Sound, hearing
Myring/o Tympanic membrane
Tympan/o Tympanic membrane
Salping/o Tube, eustachian tube
Staped/o Stapes
Sensorineural hearing loss Results from damage to inner ear, cranial nerve or auditory pathways
Conductive hearing loss Results from blockage in sound transmission
Otitis media Fluid accumulation in the middle ear
Otomycosis Fungal infection of the ear
Meniere disease Excess fluid pressure in the inner ear Hearing loss, vertigo, tinittus, and a feeling of pressure
Acoustic neuroma Tumor that arises from the sheath of the 8th cranial nerve Tinnitus, vertigo and hearing loss
Tinnitus Ringing in the ears
Vertigo Dizziness
Myringotomy Incision of the tympanic membrane
Aural Pertaining to the ear
Decibel Measuring the intensity of sound
Mastoid process Projection of temporal bone
Cholesteatoma Mass containing cholesterol in middle ear or mastoid region
Presbycusis Loss of hearing due to aging presbyacusis
Otorhinolaryngeology Study of ears nose and throat
Orbit Bony socket that protects the eye
Palpebrae Eyelids
Lacrimal gland Tear gland
Conjunctiva Thin membrane that lines the eyelids
Sclera White of the eye, outermost protective layer
Uvea Middle layer; consists of choriod, ciliary body, and iris
Choroid Pigmented layer that nourishes the retina
Ciliary body Controls the shape of the lens to allow for near and far vision
Accomodation Adjustment of the lens to allow for near and far vision
Iris Muscular ring that dilates with low light and constricts with bright light in the pupil
Retina Innermost layer, receptor for vision, contains rods and cones
Refraction Bending of light rays
Optic disk Optic nerve joins the retina; blind spot
Fovea Point of greatest visual accuity
Vitreous body Maintains shape of eye and refract light; fills the eyeballs cavity
Aqueous humor Fluid that fills the eye
Convergence Both eyes fixate on the same point
Cone Responds to bright light and color
Rod Responds to low light and do not respond to color
Córnea Clear part of the sclera in front of the eye
Macula Small spot or colored area
Visual accuity Sharpness of vision
Blephar/o Eyelid
Palpebr/o Eyelid
Dacry/o Tear, tear duct
Dacryocyst/o Lacrimal sac
Lacrim/o Tear duct
Kerat/o Cornea
Lent/i Lens
Phak/o, phac/o Lens
Cycl/o Ciliary body
-opsia Vision condition
-opia Vision, condition of the eye
Macular degeneration Deterioration of the macula
Astigmatism Córnea or lens is curved wrong
Cataract Cloudiness of the lens
Conjunctivitis Pink eye
Diabetic retinopathy Changes in the retina cause by DM
Glaucoma Increased pressure in the eye, caused by blockage
Hyperopia Farsightedness
Myopia Nearsightedness
Presbyopia Farsightedness caused by age
Retinal detachment Retina detaches from choroid
Amblyopia One eye does not work as well as the other
Blepharoptsis Drooping of the eye
Chlazion Mass on the eyelid
Floater Small moving object in the field of vision
Miosis Abnormal contraction of the pupils
Mydriasis Abnormal dilation of the eye
Nystagmus Rapid involuntary movements of the eye
Papilledema Swelling of the optic disk
Strabismus One eye is looking somewhere else
Enucleation Surgical removal of the eye ball
Mydriatic Drug that causes dilation of the pupil
Created by: Lmadams92