What
Outside ear; sound enters; determine where sound comes from; cartilage and soft tissue
Pinna
Epithelial atrophy and degeneration of hair cells. High frequency affected
Sensory presbycusis
Illness; hereditary hearing loss; aging; head trauma; inner ear formation deficit; listening to loud noises or explosions
Causes of sensorinueral hearing loss
Device that can help severe hearing loss; does not lead to "normal" hearing; success of implant depends on age of patient, motivation, if pt started talking before hearing loss
Cochlear implants
Normal age related hearing loss; bilateral; gradual. Age related sensorineural hearing loss.
Presbycusis
Pinna; external auditory meatus
Outer ear
Fluid in middle ear; ear infections; poor Eustachian tube function; hole in eardrum; benign tumor; cerumen in ear canal; external otitis; object stuck in outer ear; deficits in outer or middle ear formation
Causes for conductive hearing loss
Semicircular canals; utricle; saccule and needed for...
balance
Problem transferring sound waves anywhere along pathway from the outer ear, tympanic membrane, or middle ear. Middle and external ear are affected. Sound can still be analyzed but you need to speak louder and maybe directly to the patient's ear.
Conductive hearing loss
Speech discrimination, tone is spared. Words that sound the same are mixed up
Neural presbycusis
Tympamic membrane; ossicles (malleus, incus, stapes); Chain from tympanic membrane to inner ear; sends a signal to the inner ear
Middle ear
Hearing and balance are achieved by what portion of the ear?
sounds enter the external auditory meatus; ossicles move; causes fluid to move; triggers hair cells; convert to electrical signals; to auditory nerve; to brain
Events leading to hearing
Disorder in the motion mechanisms of the cochlear duct. High pitched consonants affects- s, t, f, g
Cochlear conductive presbysusis
Cochlea; fluid and hair cells allow...
Hearing
Severe to profound hearing loss in both ears; hearing aids dont work; no medical problems that make surgery risky; wants to listen and speak; started talking before hearing loss
Damage to inner ear, nerve pathway; soft sounds may be harder to hear; louder sounds may be unclear or may sound muffled; most common type of permanent hearing loss; medicine or surgery cannot fix SNHL; hearing aids may help
Sensorineural hearing loss
Cause in inner ear or sensory organs; vestibulocochlear nerve (CN VIII); auditory nerve; brain-auditory cortex (in the temporal lobe)
Sensorineural hearing loss
Arteriosclerotic vascular changes. Uniform reduction
Strial presbycusis
have profound hearing loss in both ears; hearing aids didnt work; no medical problems that make surgery risky; will be able to get treatment to work on hearing skills
criterial for children to get cochlear implant