II- S. Measurement of frequency, voltage, and duration Flashcards
What is the voltage of a spike if it measures 15 mm peak-to-peak and the sensitivity value is 10 microvolts/mm?
A) 75 mV
B) 150 microvolts
C) 1.5 mV
D) 25 microvolts
150 microvolts
1 centimeter
A) 100 mm
B) .01 mm
C) 10 mm
D) 1 inch
10 mm
A 50 microvolt wave at sensitivity 5 microvolts/mm produces a deflection of
A) 7.5 mm
B) 10 mm
C) 15 mm
D) 5 mm
10 mm
If theta activity from a drowsy child recorded at a sensitivity of 7 uV/mm results in a deflection of 20 mm, what is the voltage?
A) 20 uV
B) 70 uV
C) 2.9 uV
D) 140 uV
140 uV
What is the duration of a 10 Hz wave at a display of 15 mm/second?
A) 50 msec
B) 100 msec
C) 200 msec
D) 15 msec
100 msec
Calculate the voltage of the waveform in the box.
A) 20-25 uV
B) 45-50 uV
C) 5-10 uV
D) 30-35 uV
20-25 uV
A 9 mm deflection at a setting of 20 microvolts/mm will have an input signal of
A) 180 microvolts
B) 3 microvolts
C) 30 microvolts
D) 100 microvolts
180 microvolts
In an EEG displayed at 30mm/sec, a high voltage transient with a duration of 2mm would be:
A) Theta
B) Sharp
C) Alpha
D) Spike
Spike
Calculate the duration of the waveform in the box.
A) 250 msec
B) 225 msec
C) 50 msec
D) 150 msec
150 msec
Given a voltage of 50 microvolts and a sensitivity of 10 microvolts/mm, what is the amplitude?
A) 0.2 uV/mm
B) 5 mm
C) 5 uV/mm
D) 0.2 mm
5 mm
VOLTAGE
A) V= D/S
B) V= S/D
C) V= SD
D) V= S+D
V = SD
What is the approximate duration of the waveform in the box?
A) 1 second
B) 800 msec
C) 400 msec
D) 200 msec
400 msec
Which of the following represents the duration of a sharp wave?
A) 70-200 msec
B) Greater than 200 msec
C) 20-65 msec
D) Less than 10 msec
70-200 msec
Bandwidth for routine EEG activity
A) 220-300 Hz
B) 140-200 Hz
C) 80-130 Hz
D) 1-70 Hz
1-70 Hz
What is the frequency of the activity in the box?
A) Delta
B) Beta
C) Alpha
D) Theta
Delta
