CETP: Electrophysiology 2025/26 Study Pack |
High-Scoring Verified Quizzes and Answers
what are the 3 auditory fast latency responses? - 1. ABR
2. ASSR
3. FFR
OAEs are ___ responses - cochlear
what are 3 electrocochleographic responses? - 1. CAP
2. SP
3. CM
mid-latency and slow/late-latency responses come from the ____. They are ___ responses -
cortex
cortical responses
We discussed 2 ways to measure brain activity. Describe the difference between:
a) a hemodynamic/metabolic approach
b) an electrical (EEG) or magnetic (MEG) approach - a)
PET/fMRI
- there is rich blood supply to the brain
- thinking requires blood (to deliver oxygen to the brain).
- trace blood oxygen levels in the brain to see where activity is happening.
- great spatial resolution
- poor temporal resolution
,b)
- neurons transmit electrical signals that can be recorded
- the electrical activity creates voltage changes at the scalp
- electrical activity creates magnetic fields that can be measured from the scalp
- spatial resolution is poor
- temporal resolution is great
what is the hemodynamic approach generally used for studying?
Is it used in audiology? why or why not? - generally used for studying structure and
function of pathways of speech perception/language
not used in audio.
- poor temporal resolution
- expensive
- invasive
- but referrals may be made (ex. MRI)
what are electrical and magnetic approaches generally used for?
Are they used in audio? why or why not? - estimate hearing threshold
detect lesions
assess neural integrity and timing and multiple levels (ex. cochlea to cortex)
used a ton in audio.
- excellent temporal resolution
- inexpensive
- non invasive
, - little compliance required
electrical movement goes from __ potential to __ potential - high to low
rate of flow of electricity is measured in ___ - amps (I)
resistance to flow is ____ - resistance (R)
potential difference is measured in ___ - volts (V)
sodium-potassium pump moves ___+ outside cell and ___+ inside - sodium outside
potassium inside
briefly, how does the sodium potassium pump work - membrane is more permeable to
K+ (about 40x)
some potassium flows out (because of concentration gradient)
but then more positive charge outside of cell, so electrical force pulls against this, leads to
charge of about -80 mV
leakage of Na+ changes this to about -65 mV
action potential can fire
calcium pump keeps Ca2+ ___ of cell - outside
what increases the permeability of the membrane to calcium or sodium? -
neurotransmitters
ex. glutamate
there are 2 sides to the electric neuron:
1) action potentials
2) post synaptic potentials
High-Scoring Verified Quizzes and Answers
what are the 3 auditory fast latency responses? - 1. ABR
2. ASSR
3. FFR
OAEs are ___ responses - cochlear
what are 3 electrocochleographic responses? - 1. CAP
2. SP
3. CM
mid-latency and slow/late-latency responses come from the ____. They are ___ responses -
cortex
cortical responses
We discussed 2 ways to measure brain activity. Describe the difference between:
a) a hemodynamic/metabolic approach
b) an electrical (EEG) or magnetic (MEG) approach - a)
PET/fMRI
- there is rich blood supply to the brain
- thinking requires blood (to deliver oxygen to the brain).
- trace blood oxygen levels in the brain to see where activity is happening.
- great spatial resolution
- poor temporal resolution
,b)
- neurons transmit electrical signals that can be recorded
- the electrical activity creates voltage changes at the scalp
- electrical activity creates magnetic fields that can be measured from the scalp
- spatial resolution is poor
- temporal resolution is great
what is the hemodynamic approach generally used for studying?
Is it used in audiology? why or why not? - generally used for studying structure and
function of pathways of speech perception/language
not used in audio.
- poor temporal resolution
- expensive
- invasive
- but referrals may be made (ex. MRI)
what are electrical and magnetic approaches generally used for?
Are they used in audio? why or why not? - estimate hearing threshold
detect lesions
assess neural integrity and timing and multiple levels (ex. cochlea to cortex)
used a ton in audio.
- excellent temporal resolution
- inexpensive
- non invasive
, - little compliance required
electrical movement goes from __ potential to __ potential - high to low
rate of flow of electricity is measured in ___ - amps (I)
resistance to flow is ____ - resistance (R)
potential difference is measured in ___ - volts (V)
sodium-potassium pump moves ___+ outside cell and ___+ inside - sodium outside
potassium inside
briefly, how does the sodium potassium pump work - membrane is more permeable to
K+ (about 40x)
some potassium flows out (because of concentration gradient)
but then more positive charge outside of cell, so electrical force pulls against this, leads to
charge of about -80 mV
leakage of Na+ changes this to about -65 mV
action potential can fire
calcium pump keeps Ca2+ ___ of cell - outside
what increases the permeability of the membrane to calcium or sodium? -
neurotransmitters
ex. glutamate
there are 2 sides to the electric neuron:
1) action potentials
2) post synaptic potentials
