| Terms |
Definitions |
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Auditory Trainers
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Amplifies speech
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Pure tone
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A single frequency
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170. What are malignancies that affect the outer ear?
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cancer
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Outer (external ear)
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-Auricle (pinna) -External auditory canal (metaus) -Eardrum (tympanic membrane)
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Frequency
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The number of complete wavelengths that pass a point in a given time.
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presbycusis
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age-related loss of high frequency hearing
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Tympanic Membrane
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Elastic, thin and cone-shaped. Flexile and tough and vibrate in response to sound pressure
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Electrophysiological audiometry
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Measure of auditory mechanism functioning by measuring electrical impulses
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Pitch
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A tone's highness or lowness; depends on frequency.
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the oval window
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what separates the middle ear(vestibule) from the inner ear?
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what percent of hearing loss is Nonsyndromic?
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70%
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Cerumen
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Wax secreted by special cells. It lubricates and cleanses the canal, protects the ear from fungi, bacteria, and small insects
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Otitis Media
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Infection of the middle ear associated with upper-respiratory infections and eustachian tube dysfunction. Frequently in infants and children but rarely in adults. Creates a conductive loss of 20-35 dB HL
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saxophone
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a curved wind instrument made of brass with a reed and keys
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Inner Ear
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The innermost part of the ear, containing the cochlea, semicircular canals, and vestibular sacs.
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malleus
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which ossicle is in contact with the tympanic membrane?
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basilar membrane
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membrane between scala media and scala tympani
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165. What is otitis externa?
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It is a skin inflamed
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Simple harmonic motion
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A single tone that repeats itself
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Localization audiometry
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Used with older infants, presenting a sound and seeing of the infant will turn their head toward it
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Bone conductions testing
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Assesses the sensitivity of the sensorineural position of the auditory mechanism. A bone vibrator is placed on the forehead or behind the test ear. It is difficult to which ear heard the sound
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listen
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to give attention with the ear; attend closely for the purpose of hearing; give ear.
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Outer Ear
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consists of the pinna and the external auditory meatus; pinna assists in localization
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tensor tympani
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muscle that attaches to the handle of the malleus and keeps the eardrum taut
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inner hair cells
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90-95% of the cochlear nerve fiber terminate on this type of hair cell
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low frequency
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what type of sounds are detected at the apex of the cochlea?
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200. What else can cause cochlear hearing loss in an infant?
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Prematurity, hypoxia, rh incompatibility
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145. How many chemical base pairs of dna are there?
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3 billion
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Peripheral Hearing Problems
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Results from problems in the oter, middle, or inner ear
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Acoustic Reflex
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The middle ear muscles contract in a reflexive action when a person hears very loud noises that could damage the ear
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Cochlea divided in 3 canals
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1. vestibular duct 2. tympanic duct 3. cochlear duct
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Sensorineural Hearing Loss
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Hearing loss caused by damage to the cochlea's receptor cells or to the auditory nerves; also called nerve deafness.
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Therapsid (their jaw is in the middle of an early mammal's and a pelycosaur)
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early mammal-like reptiles
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143. What is the genetic code?
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the entire string of dna
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166. What are other inflammatory conditions affecting the auricle and EAC?
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keloids a response to condition keloid a response to condition kelopd inflammatory response
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Inner Ear: Basal Membrane
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Floor of the cochlea which contains the organ of Corti. The organ of Corti is bathed in endolymph and contains several thousand (15,500) hair cells, or cilia, which respond to sound vibrations
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Speech reception threshold
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The lowest level of hearing at which a person can understand 50% of the word presented (spondee word lists.)
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1 single row (so ~3,500)
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how many rows of inner/internal hair cells are there?
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141. What is a gene?
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it is the functional unit of genetics, chemical building blocks
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a tiny prostethic ceramic implant (prosthesis) can be used to replace the stapes
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how do you correct otosclerosis later in life?
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206. What are two different and distinct ways an inner ear can be damaged?
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duration of exposure and intensity of acoustic stimulation
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176. What are some test findings seen in TM perforation?
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tymponomitry gives you a volume reading and if the volume is larger then normal then you are measuring more.. ie all the way to the middle ear
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glycoprotein layer (hair cells are embedded in it)
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layer of goo overlying hair cells in the macula
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142. What is the relationship between: gene DNA and proteins?
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genes which make up dna instruct the cells to build proteins
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amplify and convert sound waves to mechanical signals transmitted to a liquid medium
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what is the job of the middle ear?
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Why is the term junk dna misleading or inaccourate?
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Because just cause we don’t know what is does does not make it junk
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they are part of the membranous labyrinth, so they are filled with endolymph
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what kind of fluid is found in the saccule and utricle?
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152. What is “locus” as regards a gene?
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it is the specific location of a gene on a chromosome
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