EEG BOARD Prep (Part 1)
The basic unit for measuring current flow is:
a. atomic weight
b. Coulomb
c. Volt
d. Ampere
d. ampere
The basic unit of resistance is:
a. Ohm
b. Coulomb
c. Ampere
d. Volt
a. ohm
Which of the following is NOT a valid expression of Ohm's Law:
a. R=EI or (R=VI)
...
EEG BOARD Prep (Part 1)
The basic unit for measuring current flow is:
a. atomic weight
b. Coulomb
c. Volt
d. Ampere
d. ampere
The basic unit of resistance is:
a. Ohm
b. Coulomb
c. Ampere
d. Volt
a. ohm
Which of the following is NOT a valid expression of Ohm's Law:
a. R=EI or (R=VI)
b. E=IR or (V=IR)
c. I=E/R or (I=V/R)
d. R=E/I or (R=V/I)
a. R=EI or (R=VI)
Which of the following is NOT a unit for measuring alternating frequencies:
a. cycles per second
b. volts
c. hertz
d. kilocycles
b. volts
Which of the following describes the action of a capacitor?
a. opposes changes in current flow
b. converts A/C to D/C
c. creates a direct current resistance
d. stores energy
d. stores energy
A circuit that allows some frequencies to pass through it, while others are
blocked is a:
a. resistor
b. transistor
c. filter
d. reactor
c. filter
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
a. amplifier
,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. 60Hz interference
d. noise
d. noise
The EEG amplifier is designed so that when input 1 is more negative than input 2,
the deflection will be
upward
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. controlle by the 60-cycle notch filter
b. the characteristic of an amplifier that rejects external interference
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
d. 0.1 Hz
Time constant is defined as the time required for the deflection to fall (decay):
a. to 47% of the peak deflection
b. 57% of the peak deflection
c. 77% of the peak deflection
d. to 37% of the peak deflection
d. to 37% of the peak deflection
An EEG record has 3/sec spike & wave discharges. Both the spike and the slow
wave have voltages of 100uV. If this discharge is recorded with a LFF of 5Hz and
a sensitivity of 10uV/mm, what would be the deflection of the spike and the wave?
a. spike 10mm & wave 6mm
b. spike 6mm & wave 10mm
c. spike 10mm & wave 10mm
d. spike 6mm & wave 6mm
a. spike 10mm wave 6mm
A high frequency setting of 35Hz would attenuate 50Hz muscle activity by
approximately what percentage:
a. 10%
b. 20%
c. 40%
d. 100%
c. 40%
According to ACNS Guidelines, Recording on Clinical EEG on Digital Media
requires monitors to have between 25 & 35mm/second horizontal scaling and a:
a. maximum of 1,000 data points/second to accurately display EEG on the
,monitor screen
b. minimum of 100 data points/second to accurately display EEG on the monitor
screen
c. maximum of 100 data points/second to accurately display EEG on the monitor
screen
d. minimum of 1,000 data points/second to accurately display EEG on the monitor
screen
b. MINIMUM of 100 data points/second to accurately display EEG on the monitor
screen
The filters creating a very narrow band pass that should RARELY be used
clinically are:
a. LFF 5.0Hz & HFF 70Hz
b. LFF 5.0Hz & HFF 15Hz
c. LFF 0.1Hz & HFF 70Hz
d. LFF 0.1Hz & HFF 15Hz
b. LFF 5.0Hz & HFF 15Hz
During the recording of cerebral activity, the calibration input voltage is changed
from 50uV to 100uV...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
a. no effect on the activity being recorded
A spike is printed out on paper and measures 16mm peak to peak, the sensitivity
of the instrument is 7uV/mm and a calibration signal of 50uV causes a deflection
of 7.1mm...what is the voltage of the spike?
a. 1.2uV
b. 112uV
c. 12uV
d. 24uV
b. 112uV
What input voltage is necessary to give a calibration deflection between 5 and
10mm if the sensitivity is 30uV/mm?
a. 10uV
b. 50uV
c. 100uV
d. 200uV
d. 200uV
According to the ACNS Guidelines 2006, the minimum sampling rate for EEG
data, should be at least how many times the highest HFF setting:
a. two
b. three
c. four
d. ten
b. three
, In a record with 10Hz alpha activity, when the display epoch is changed from 10
seconds/display screen to 20 seconds/display screen, the frequency of the
activity will be:
a. 5Hz
b. 15Hz
c. 20Hz
d. 10Hz
d. 10 Hz
In a DC calibration wave, if in channel-B compared to channel-A, is "slower", what
instrument change would have been made to channel B:
a. display epoch length
b. decrease LFF
c. increase HFF
d. sensitivity
b. decrease LFF
Guidelines for recording digital EEG are written by:
a. the American Society of Electroneurodiagnostic Technologist (ASET)
b. the American Academy of Neurology (AAN)
c. the American Clinical Neurophysiology Society (ACNS)
d. the Organization of Societies of Electrophysiological Technology (OSET)
c. the American Clinical Neurophysiology Society (ACNS)
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
d. temporary memory storage that is critical to rapid computer operations
Three basic computer PORTS are:
a. intranet, internet & extranet
b. internal, external & bifid
c. serial, paradoxical & US
d. serial, parallel & USB
d. serial, parallel & USB
The best metals for clinical EEG recording are:
a. gold-plated lead, nickel or silver
b. silver-silver chloride, platinum or gold
c. tin, copper, or silver-silver chloride
d. stainless steel, platinum or silver
b. silver-silver chloride, platinum or gold
Which electrodes do NOT record directly from the brain?
a. depth
b. sub-dermal
c. subdural
d. epidural
b. sub-dermal
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