BASIC EEG TECHNOLOGY
EXAM WITH CORRECT
ANSWERS 2025
Laplacian montage correct answers >> Averaged
reference from surrounding electrodes used
Least invasive electrode correct answers >>
Subdermal
Signal measuring 8mm has voltage of 72 uV,
What is the sensitivity? correct answers >> 9
In a chain of 3 sequential channels, "the end of chain"
occurs when the maximum amplitude of given activity is:
A. At the electrode of input 2 of the first channel
B. At or outside the electrode of input 1 of the first
channel
C. At or outside the electrode of input 2 of the last
channel
D. B and C correct answers >> B and C
GRADED A+
,B. At or outside the electrode of input 1 of the first
channel
C. At or outside the electrode of input 2 of the last
channel
When using a referential (ear) montage, all of the
following problems may be encounter except:
-Ear contamination
-false localization
-Phase shift
-Amplitude attenuation correct answers >> Phase
shift
When a 50uV calibration height is 1 cm, what is the
amplitude of activity that measures 4mm?
-10 uV
-20 uV
-40 uV
-100uV correct answers >> 20uV
What type of montage combines activity from many
electrodes to form a reference? correct answers >>
Average reference
GRADED A+
, If the HFF is set at 70 Hz, about how much attenuation
will there be for a 35 Hz wave? correct answers >>
0%
With the time scale of 4 cm per second, what is the
frequency of activity measuring 10mm? correct
answers >> 4 Hz
In a bipolar recording, a sharp activity from F7-T3 shows
an upward deflection, T3-T5 shows not activity, and T5-T6
shows downward deflection. In this case the activity
means correct answers >> There is maximally
positive polarity and equipotential at T3 and T5
Which of the following frequencies is the least affected by
the time constant of 0.03 seconds?
-1 Hz
-5 Hz
-10 Hz
-35 Hz correct answers >> 35 Hz
The Laplacian Montage is often used for? correct
answers >> Topographic EEG mapping
GRADED A+
EXAM WITH CORRECT
ANSWERS 2025
Laplacian montage correct answers >> Averaged
reference from surrounding electrodes used
Least invasive electrode correct answers >>
Subdermal
Signal measuring 8mm has voltage of 72 uV,
What is the sensitivity? correct answers >> 9
In a chain of 3 sequential channels, "the end of chain"
occurs when the maximum amplitude of given activity is:
A. At the electrode of input 2 of the first channel
B. At or outside the electrode of input 1 of the first
channel
C. At or outside the electrode of input 2 of the last
channel
D. B and C correct answers >> B and C
GRADED A+
,B. At or outside the electrode of input 1 of the first
channel
C. At or outside the electrode of input 2 of the last
channel
When using a referential (ear) montage, all of the
following problems may be encounter except:
-Ear contamination
-false localization
-Phase shift
-Amplitude attenuation correct answers >> Phase
shift
When a 50uV calibration height is 1 cm, what is the
amplitude of activity that measures 4mm?
-10 uV
-20 uV
-40 uV
-100uV correct answers >> 20uV
What type of montage combines activity from many
electrodes to form a reference? correct answers >>
Average reference
GRADED A+
, If the HFF is set at 70 Hz, about how much attenuation
will there be for a 35 Hz wave? correct answers >>
0%
With the time scale of 4 cm per second, what is the
frequency of activity measuring 10mm? correct
answers >> 4 Hz
In a bipolar recording, a sharp activity from F7-T3 shows
an upward deflection, T3-T5 shows not activity, and T5-T6
shows downward deflection. In this case the activity
means correct answers >> There is maximally
positive polarity and equipotential at T3 and T5
Which of the following frequencies is the least affected by
the time constant of 0.03 seconds?
-1 Hz
-5 Hz
-10 Hz
-35 Hz correct answers >> 35 Hz
The Laplacian Montage is often used for? correct
answers >> Topographic EEG mapping
GRADED A+
