Anatomy | Cochlea and Hearing | Otitis Media | Hearing Loss | Assessment of Hearing |
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Stapedius
This muscle is connected to the stapes...
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Scala Vestibuli (vestibular canal), Scala Tympani (tympanic canal) and Scala Media (cochlear duct)
The three canals/fluid-filled spaces in the cochlea are...
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True
True or false: a child of <6 months with AOM should be treated immediately with an antibiotic?
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Congenital conductive
What type of hearing loss is the absence/malformation of the auricle?
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Deafness, Vertigo, Tinnitus, Pain (Otalgia), Discharge (Otorrhoea), Itch
Name two symptoms of ear disease.
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Equalises pressure between the middle and inner ear, and also drains the middle ear.
What is the function of the Eustachian (auditory) tube?
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The bony core of cochlea containing the spiral ganglion
What is the modiolus?
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OM with effusion
Middle-ear effusion without acute signs of infection = ?
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Infection, trauma, tumour, systemic disease, dermatologic
In the outer ear, name two acquired forms of conductive hearing loss
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Tympanometry
An objective test which measures the changes in acoustic impedance of the middle ear system in response to changes in air pressure is...
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Week 4
In which week of development does the ear start to form?
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3 rows outer hair cells (efferent) for sensitivity of the system and 1 row of inner hair cells (afferent) for sensory transduction
Describe the arrangement of hair cells on the organ of corti
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3 months
What is the time cut-off for OM to be classed as chronic?
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Ringing in the ears
What is tinnitus?
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Otoacoustic Emissions
A test used to confirm sensorineural hearing loss is...
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o Skin
o Fibro-collagenous core o Mucous membrane
Name the three layers of the tympanic membrane
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Frequency
How far sound can resonate along the basilar membrane determines...
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Chronic Suppurative OM
Purulent drainage from the middle ear for at least two weeks and perforated tympanic membrane = ?
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Acquired conductive
Otosclerosis is a form of what type of hearing loss?
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Both
Can a Weber’s Test detect conductive hearing loss, sensorineural hearing loss or both?
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Eustachian tube is shorter and more horizontal
Why are children more susceptible to middle ear infections than adults?
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The intensity/volume
The number of hair cells that the sound is able to stimulate determines...
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Grommets
OME in children who are at risk of speech, language, or learning problems is an indication for what type of treatment?
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Aminoglycosides
Name a class of antibiotic which is ototoxic
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Colour, transparency, dilated blood vessels, bulging or retraction, perforation.
Name 3 things you would look for on inspection of the tympanic membrane..
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