The basic unit for measuring current flow is? - ANSWER Ampere
The basic unit of resistance? - ANSWER 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 - ANSWER A. R=EI or R=VI
Which of the following is not a unit for measuring alternating frequencies?
A. Cycles per sec
B. Volts
C. Hertz
D. Kilocycles - ANSWER B. Volts
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 direct current resistance
D. stores energy - ANSWER D. stores energy
1
,What is a filter? - ANSWER A circuit that allows some frequencies to pass through it,
while others are blocked
What is an amplifier? - ANSWER A combination of electronic components designed to in-
crease the power, voltage or current of a signal.
A small fluctuating output recorded by the EEG instrument even when there is no input sig-
nal is called:
a. output voltage
b. linear distortion
c. 60Hz interference
d. noise - ANSWER D. noise
The EEG amplifier is designed so that when input 1 is more negative then input 2, the deflec-
tion will be? - ANSWER Upward
What is common mode rejection? - ANSWER the characteristic of an amplifier that re-
jects external interference
Which of the following is most attenuated by a low frequency filter of 1 Hz?
A. .5hz
B. 5hz
C. 10 hz
D. .1hz - ANSWER D. 0.1hz
Time constant is defined as the time required - - ANSWER for the deflection to fall (decay)
to 37% of the peak deflection.
2
,A high frequency setting of 35hz would attenuate 50hz muscle activity by approximately
what percentage? - ANSWER 40%
According to ACNS Guidelines, recording clinical EEG on digital media requires monitors to
have? - ANSWER Between 25 and 35 mm/second horizontal scaling and a minimum of
100 data points/second to accurately display EEG on the monitor screen.
The filter creating a very narrow band pass that should rarely be used clinically-
a. LF 5.0 and HF 70hz
b. LF 5.0 and HF 15hz
c. LF 0.1 and HF 70hz
d. LF 0.1 and HF 15hz - ANSWER B. LF 5.0 and HF 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 - ANSWER A. no effect on the activity being recorded
According the ACNS guidelines 2006, the minimum sampling rate for EEG Data, should be at
least____________times the highest high frequency filter setting. - ANSWER Three
In a record with 10hz 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________ - ANSWER 10hz
Guidelines for recording digital EEG are written by: - ANSWER The american clinical neu-
rophysiology society (ACNS)
3
, The term RAM means: - ANSWER TEMPORARY MEMORY STORAGE THAT IS CRITICAL TO
RAPID COMPUTER OPERATIONS
Three basic computer ports are: - ANSWER serial, parallel, usb
The best metals for clinical EEG recording are_________? - ANSWER Silver-silver chloride,
platinum or gold
Which of the following is not related to measuring electrode resistance?
A. opposition to direct current flow
B. measurement while the electrode is unattached to the scalp
C. measurement with an ohmmeter
D. opposition to alternating current flow - ANSWER D. opposition to alternating current
flow
The electrode site that is located 1cm above, one third the distance out from the left exter-
nal auditory meatus toward the left outer canthus is called? - ANSWER T1 or F9
Due to a central scalp lesion, C4 has to be relocated 4mm anteriorly. The technologist
should:
a. relocate C3 4mm anteriorly
b. make no other placement changes
c. relocate P3 4mm anteriorly
d. relocate all electrodes in the right parasagittal plane 4mm anteriorly - ANSWER a. relo-
cate C3 4mm anteriorly
A patient can become the pathway for least resistance and therefore electically susceptable
to shock when;
a. the recording instrument is turned on
4
The basic unit of resistance? - ANSWER 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 - ANSWER A. R=EI or R=VI
Which of the following is not a unit for measuring alternating frequencies?
A. Cycles per sec
B. Volts
C. Hertz
D. Kilocycles - ANSWER B. Volts
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 direct current resistance
D. stores energy - ANSWER D. stores energy
1
,What is a filter? - ANSWER A circuit that allows some frequencies to pass through it,
while others are blocked
What is an amplifier? - ANSWER A combination of electronic components designed to in-
crease the power, voltage or current of a signal.
A small fluctuating output recorded by the EEG instrument even when there is no input sig-
nal is called:
a. output voltage
b. linear distortion
c. 60Hz interference
d. noise - ANSWER D. noise
The EEG amplifier is designed so that when input 1 is more negative then input 2, the deflec-
tion will be? - ANSWER Upward
What is common mode rejection? - ANSWER the characteristic of an amplifier that re-
jects external interference
Which of the following is most attenuated by a low frequency filter of 1 Hz?
A. .5hz
B. 5hz
C. 10 hz
D. .1hz - ANSWER D. 0.1hz
Time constant is defined as the time required - - ANSWER for the deflection to fall (decay)
to 37% of the peak deflection.
2
,A high frequency setting of 35hz would attenuate 50hz muscle activity by approximately
what percentage? - ANSWER 40%
According to ACNS Guidelines, recording clinical EEG on digital media requires monitors to
have? - ANSWER Between 25 and 35 mm/second horizontal scaling and a minimum of
100 data points/second to accurately display EEG on the monitor screen.
The filter creating a very narrow band pass that should rarely be used clinically-
a. LF 5.0 and HF 70hz
b. LF 5.0 and HF 15hz
c. LF 0.1 and HF 70hz
d. LF 0.1 and HF 15hz - ANSWER B. LF 5.0 and HF 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 - ANSWER A. no effect on the activity being recorded
According the ACNS guidelines 2006, the minimum sampling rate for EEG Data, should be at
least____________times the highest high frequency filter setting. - ANSWER Three
In a record with 10hz 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________ - ANSWER 10hz
Guidelines for recording digital EEG are written by: - ANSWER The american clinical neu-
rophysiology society (ACNS)
3
, The term RAM means: - ANSWER TEMPORARY MEMORY STORAGE THAT IS CRITICAL TO
RAPID COMPUTER OPERATIONS
Three basic computer ports are: - ANSWER serial, parallel, usb
The best metals for clinical EEG recording are_________? - ANSWER Silver-silver chloride,
platinum or gold
Which of the following is not related to measuring electrode resistance?
A. opposition to direct current flow
B. measurement while the electrode is unattached to the scalp
C. measurement with an ohmmeter
D. opposition to alternating current flow - ANSWER D. opposition to alternating current
flow
The electrode site that is located 1cm above, one third the distance out from the left exter-
nal auditory meatus toward the left outer canthus is called? - ANSWER T1 or F9
Due to a central scalp lesion, C4 has to be relocated 4mm anteriorly. The technologist
should:
a. relocate C3 4mm anteriorly
b. make no other placement changes
c. relocate P3 4mm anteriorly
d. relocate all electrodes in the right parasagittal plane 4mm anteriorly - ANSWER a. relo-
cate C3 4mm anteriorly
A patient can become the pathway for least resistance and therefore electically susceptable
to shock when;
a. the recording instrument is turned on
4
