Ear & Hearing 2 Flashcards
Which side of the brain processes spoken language?
The left side
Where is the primary auditory cortex found?
Tucked into the superior medial surface of temporal lobe
Why side of the brain is to do with inflection of speech?
The right
Which hemisphere is Wernicke’s and Broca’s area found?
The left
What happens in Wernicke’s aphasia
They can say words, but the combination of words make no sense
Fluent and grammatical, often meaningless, nonsense words
What happens in Broca’s aphasia?
Language is halting and non grammatical
Lack of pronouns & conjunctions
How is the cochlea protected from loud noise?
The stapedius reflex
The Statius muscle limits the movement if the stapes
What happens in the ear before we speak?
The stapedius muscle activates to attenuate our own voice
What’s the human hearing range?
20Hz ➡️ 20KHz
An increase of 20dB = a ….fold increase in energy
10 fold increase
How many dB causes damage?
120 and more
How many dB increase corresponds to a doubling of sound energy?
3dB
Name some causes if tinnitus
Ear infections, glue ear, otosclerosis
Hair cell damage, drug side effects
Turbulent BF in vessels of ears, grinding if TMJ
Miniseries disease (fluid vol changes in inner ear)
What medications can effect hair cells?
Aspirin, paracetamol, ibuprofen, some antibiotics, anti malarial drugs
Noise induced hearing loss typically first appears as a reduction in sensitivity at how many Hz?
4
