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ABRET
ABRET EEG EXAMINATION (NEW 2024/
2025 UPDATE) QS & AS| GRADE A| 100%
CORRECT (VERIFIED ANSWERS)
When would a normal EEG be expected? - ANS ✓MS
While performing an EEG, C4 is moved 1cm posteriorly. What else should
the tech. do? - ANS ✓Move C3 1cm posteriorly
If a patient has a circumference of 55cm, which of the following
interelectrode distances can be calculated? - ANS ✓O1-O2
What electrodes gives the least distortion of low frequencies? - ANS ✓silver-
silver chloride
Balanced electrode impedance is important to? - ANS ✓lessen 60 hz
interference
Balanced impedance allows you to? - ANS ✓maximize common mode rejection
Impedance can be best described as? - ANS ✓resistance to alternating current
ABRET EEG
, 2
ABRET
Extremely low voltage due to phase cancellation may be caused by? - ANS
✓salt bridge
What occurs with unbalanced electrode impedance greater than 20km? -
ANS ✓marked increase in 60hz activity
What measures the opposition to current flow when a known voltage is
applied? - ANS ✓Impedance meter
EEG is most useful in - ANS ✓encephalopathy
Impedance is the resistance of a part of a circuit passage of? - ANS ✓altering
current
Short interelectrode distance between electrodes will cause what change to
the EEG waveform? - ANS ✓decrease amplitude
Broken lead wire during recording - ANS ✓requires replacement
What is activity is prominent in T4? - ANS ✓electrode pop
ABRET EEG
, 3
ABRET
What should be your first reaction to 60hz artifact in one electrode? - ANS
✓check electrode impendence
What physiological artifact is in the sample? - ANS ✓EKG artifact
Artifact that is caused by movement of people near the patient? - ANS
✓electrostatic artifact
60 hz. filter - ANS ✓notch filter
If 60hz. is present in to channels of the EEG, the first step in troubleshooting
is? - ANS ✓check electrode impedance
Non-physiologic artifact - ANS ✓electrode
The EEG activity seen maximally in the frontal leads is? - ANS ✓Bifrontal
myogenic artifact
While recording using a bipolar montage, you notice that the channel C4-P4
is unusually flat compared to the other channels. What is the cause? - ANS
✓the electrodes are too close together
Calculate the duration of the waveform - ANS ✓150msec.
ABRET EEG
, 4
ABRET
1 centimetre - ANS ✓10mm
Calculate the voltage of the waveform - ANS ✓20-25uv
Duration of a sharp wave? - ANS ✓70-200msec
What is the frequency of the activity in the box? - ANS ✓Delta
Voltage - ANS ✓V=SD
If theta activity from a drowsy child recorded at 7 uv/mm results in a
deflection of 20mm, what is the voltage? - ANS ✓140uv
Bandwidth of routine EEG activity? - ANS ✓1-70hz.
If the sensitivity is 7uv and the voltage is 20uv. what is the measurement of
the deflection? - ANS ✓2.9mm
What is the duration of a 10hz. wave at a display of 15mm/sec? - ANS
✓100msec.
What is the duration of the waveform? - ANS ✓400msec
ABRET EEG
ABRET
ABRET EEG EXAMINATION (NEW 2024/
2025 UPDATE) QS & AS| GRADE A| 100%
CORRECT (VERIFIED ANSWERS)
When would a normal EEG be expected? - ANS ✓MS
While performing an EEG, C4 is moved 1cm posteriorly. What else should
the tech. do? - ANS ✓Move C3 1cm posteriorly
If a patient has a circumference of 55cm, which of the following
interelectrode distances can be calculated? - ANS ✓O1-O2
What electrodes gives the least distortion of low frequencies? - ANS ✓silver-
silver chloride
Balanced electrode impedance is important to? - ANS ✓lessen 60 hz
interference
Balanced impedance allows you to? - ANS ✓maximize common mode rejection
Impedance can be best described as? - ANS ✓resistance to alternating current
ABRET EEG
, 2
ABRET
Extremely low voltage due to phase cancellation may be caused by? - ANS
✓salt bridge
What occurs with unbalanced electrode impedance greater than 20km? -
ANS ✓marked increase in 60hz activity
What measures the opposition to current flow when a known voltage is
applied? - ANS ✓Impedance meter
EEG is most useful in - ANS ✓encephalopathy
Impedance is the resistance of a part of a circuit passage of? - ANS ✓altering
current
Short interelectrode distance between electrodes will cause what change to
the EEG waveform? - ANS ✓decrease amplitude
Broken lead wire during recording - ANS ✓requires replacement
What is activity is prominent in T4? - ANS ✓electrode pop
ABRET EEG
, 3
ABRET
What should be your first reaction to 60hz artifact in one electrode? - ANS
✓check electrode impendence
What physiological artifact is in the sample? - ANS ✓EKG artifact
Artifact that is caused by movement of people near the patient? - ANS
✓electrostatic artifact
60 hz. filter - ANS ✓notch filter
If 60hz. is present in to channels of the EEG, the first step in troubleshooting
is? - ANS ✓check electrode impedance
Non-physiologic artifact - ANS ✓electrode
The EEG activity seen maximally in the frontal leads is? - ANS ✓Bifrontal
myogenic artifact
While recording using a bipolar montage, you notice that the channel C4-P4
is unusually flat compared to the other channels. What is the cause? - ANS
✓the electrodes are too close together
Calculate the duration of the waveform - ANS ✓150msec.
ABRET EEG
, 4
ABRET
1 centimetre - ANS ✓10mm
Calculate the voltage of the waveform - ANS ✓20-25uv
Duration of a sharp wave? - ANS ✓70-200msec
What is the frequency of the activity in the box? - ANS ✓Delta
Voltage - ANS ✓V=SD
If theta activity from a drowsy child recorded at 7 uv/mm results in a
deflection of 20mm, what is the voltage? - ANS ✓140uv
Bandwidth of routine EEG activity? - ANS ✓1-70hz.
If the sensitivity is 7uv and the voltage is 20uv. what is the measurement of
the deflection? - ANS ✓2.9mm
What is the duration of a 10hz. wave at a display of 15mm/sec? - ANS
✓100msec.
What is the duration of the waveform? - ANS ✓400msec
ABRET EEG
