Ampere - Answer- The basic unit for measuring current flow is____.
c weight
b.Coulomb
c.Volt
d.Ampere
Ohm - Answer- The basic unit of resistance is____.
a.Ohm
b.Coulomb
c.Ampere
d.Volt
R = E I or (R = V I) - Answer- Which of the following is not a valid expression of Ohm's law?
(in ...
which of the following is not a valid expression o
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ABRET EEG Review Questions
Ampere - Answer- The basic unit for measuring current flow is____.
a.atomic weight
b.Coulomb
c.Volt
d.Ampere
Ohm - Answer- The basic unit of resistance is____.
a.Ohm
b.Coulomb
c.Ampere
d.Volt
R = E I or (R = V I) - Answer- Which of the following is not a valid expression of Ohm's
law?
(in this equation E (electromotive force) is the dame as V (Voltage)
a. R = E I or (R = V I)
b. E = I R or (V = I R)
c. I = E / R or (I = V/R)
d. R = E / I or (R = V/ I)
Volts - Answer- Which of the following is not a unit for measuring alternating
frequencies?
a. Cycles per second
b. Volts
c. Hertz
d. Kilocycles
stores energy - Answer- Which of the following describes the action of a capacitor?
a. opposes changes in current flow
b. converts alternating current to direct current
c. creates a direct current resistance
d. stores energy
filter - Answer- A circuit that allows some frequencies to pass through it, while others
are blocked is a ____.
a. resistor
b. transistor
c. filter
d. reactor
amplifier - Answer- A combination of electronic components designed to increase the
power, voltage or current of a signal
,a. amplifier
b. line filter
c. master gain control
d. sensitivity
noise - Answer- A small fluctuating output recorded by the EEG instrument even when
there is no input signal is called ____.
a. output voltage
b. linear distortion
c. 60 Hz interference
d. noise
upward - Answer- The EEG amplifier is designed so that when input 1 is more negative
than input 2, the deflection will be ____.
a. downward
b. upward
c. absent
d. sinusoidal
the characteristic of an amplifier that rejects external interference - Answer- Common
Mode Rejection is ____.
a. the ability of an amplifier to cancel out ECG artifact
b. the characteristic of an amplifier that rejects external interference
c. is dependent on the sampling rate
d. controlled by the 60-cycle notch filter
0.1 Hz - Answer- Which of the following is most attenuated by a low frequency filter of 1
Hz?
a. 0.5 Hz
b. 5.0 Hz
c. 10.0 Hz
d. 0.1 Hz
for the deflection to fall (decay) to 37% of the peak deflection - Answer- Time constant is
defined as the time required ____.
a. for the deflection to fall (decay) to 47% of the peak deflection
b. for the deflection to fall (decay) 57% of the peak deflection
c. for the deflection to fall (decay) 77% of the peak deflection
d. for the deflection to fall (decay) to 37% of the peak deflection
spike 10 mm, wave 6 mm - Answer- An EEG record has three per second spike/wave
discharges. Both the spike and the slow wave have voltages of 100 µV. If this discharge
is recorded with a low frequency filter of 5 Hz and a sensitivity of 10 µV/mm, what would
be the deflection of the spike and the
wave?
a. spike 10 mm, wave 6 mm
,b. spike 6 mm, wave 10 mm
c. spike 10mm, wave 10 mm
d. spike 6 mm, wave 6 mm
40% - Answer- A high frequency setting of 35 Hz would attenuate 50 Hz muscle activity
by approximately what percentage?
a. 10%
b. 20%
c. 40%
d. 100%
Between 25 and 35 mm/second horizontal scaling and a minimum of 100 data points
/second to accurately display EEG on the monitor screen. - Answer- According to ACNS
Guidelines, Recording Clinical EEG on Digital Media requires monitors to have _____.
a. Between 25 and 35 mm/second horizontal scaling and a maximum of 1000 data
points/second to accurately display EEG on the monitor screen.
b. Between 25 and 35 mm/second horizontal scaling and a minimum of 100 data
points /second to accurately display EEG on the monitor screen.
c. Between 25 and 35 mm/second horizontal scaling and a maximum of 100 data
points/second to accurately display EEG on the monitor screen.
d. Between 25 and 35 mm/second horizontal scaling and a minimum of 1000 data
points/second to accurately display EEG on the monitor screen.
LF 5.0 Hz and HF 15 Hz - Answer- The filters creating a very narrow band pass that
should rarely be used clinically are _____.
a. LF 5.0 Hz and HF 70 Hz
b. LF 5.0 Hz and HF 15 Hz
c. LF 0.1 Hz and HF 70 Hz
d. LF 0.1 Hz and HF 15 Hz
no effect on the activity being recorded - Answer- During the recording of cerebral
activity, the calibration input voltage is changed from 50 µV to 100 µV. What will be the
result?
a. no effect on the activity being recorded
b. a two-fold increase in amplitude
c. a one-half reduction of amplitude
d. clipping of the waveform
112 µV - Answer- A spike is printed out on paper and measures 16 mm peak to peak,
the sensitivity of the instrument is 7 µV/mm and a calibration signal of 50 µV causes a
deflection of 7.1 mm. What is the voltage of the spike?
a. 1.2 µV
b. 112 µV
c. 12 µV
d. 24 µV
, 200µV - Answer- What input voltage is necessary to give a calibration deflection
between 5 and 10 mm if the sensitivity is 30µV/mm?
a. 10µV
b. 50µV
c. 100µV
d. 200µV
three - Answer- According the ACNS Guidelines 2006, the minimum sampling rate for
EEG data, should be at least _____ times the highest high frequency filter setting.
a. two
b. three
c. four
d. ten
10 Hz - Answer- In a record with 10 Hz alpha activity. When the display epoch is
changed from 10 seconds per display screen to 20 seconds per display screen, the
frequency of the activity will be ____.
a. 5 Hz
b. 15 Hz
c. 20 Hz
d. 10 Hz
Decrease low frequency filter - Answer- Channel A in the figure above has been
recorded utilizing standard instrumentation settings. What instrument change has been
made to channel B?
a. Display epoch length
b. Decrease low frequency filter
c. Increase high frequency filter
d. Sensitivity
The American Clinical Neurphysiology Society (ACNS) - Answer- Guidelines for
recording digital EEG are written by:
a. the American Society of Electroneurodiagnostic Technologists (ASET)
b. The American Academy of Neurology (AAN)
c. The American Clinical Neurphysiology Society (ACNS)
d. The Organization of Societies of Electrophysiological Technology (OSET)
temporary memory storage that is critical to rapid computer operations - Answer- The
term RAM means:
a. read only memory used for archiving data
b. the amount of data that can be stored on a rewritable CD
c. the amount of data that can be stored on a DVD
d. temporary memory storage that is critical to rapid computer operations
Serial, parallel and USB - Answer- Three basic computer ports are:
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