Instrumentation 1-4 Questions and Answers 100% correct
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Course
Bcia
Institution
Bcia
Instrumentation 1-4 Questions and Answers 100% correct
The EEG signal is measured in microvolts. A microvolt is ______ of a volt.
1/1,000,000
The standard electrode placement system draws an imaginary line from the nasion to the
inion
The majority of EEG power falls between
0 and ...
Instrumentation 1-4 Questions and
Answers 100% correct
The EEG signal is measured in microvolts. A microvolt is ______ of a volt. - answer
1/1,000,000
The standard electrode placement system draws an imaginary line from the nasion to
the - answer inion
The majority of EEG power falls between - answer 0 and 20 Hz
Which EEG landmark is closest to the ear? - answer preauricular point (notch)
Breathing pattern can influence EEG training. For example, when hyperventilation
constricts cerebral blood vessels, it generates ______ activity. - answer theta
In North America, contamination from line current occurs primarily at - answer 60 Hz
Which of these is related to EEG signal frequency? - answer cycles per second
Eye blinks and eye movements produce artifacts that may fall within the _____ range. -
answer delta and theta
Which of these is specified in dB/octave? - answer filter slope
______ artifact is usually the strongest source of contamination during EEG recording. -
answer Sixty-Hz (50-Hz)
Which bandpass can be used to measure theta EEG activity? - answer 4-7 Hz
Power refers to the square of signal - answer amplitude
EOG artifact in EEG recording is due to - answer electrical potential differences
between the aqueous and vitreous humors of the eye
An impedance meter measures the quality of skin-electrode contact in - answer
Kohms (kilo-ohms or .001 Ohms)
Which is a slow cortical potential? - answer P300 wave
The EEG primarily reflects graded _____ potentials in ______. - answer excitatory
and inhibitory; dendrites
, Which bandpass can be used to measure alpha EEG activity? - answer 8-12 Hz
SMR activity can be detected from - answer 12-15 Hz
If your voltage is 24 and resistance is 2, current is ______ amperes. - answer 12
Which could worsen movement artifact in EEG recording? - answer lengthening the
EEG cable
A notch filter to remove line current noise typically operates from _____________ in
North America. - answer 58-62 Hz
A 1-second exposure to currents above _______ mA can produce ventricular fibrillation
- answer 50
Which circuit does a blown fuse illustrate? - answer open
When there is a break in an electrode cable, impedence measured from both ends of
the cable should be ____________ ohms - answer infinite
The highest amplitude EEG frequency band is called the _________ frequency -
answer dominant
Which filter selects signals below a specified cutoff frequency? - answer low-pass
Opposition to the movement of an AC signal through a circuit is called - answer
impedance.
Which of these measures an electroencephalograph's ability to detect the smallest
signal voltage? - answer sensitivity
Which filter selects signals above a specified cutoff frequency? - answer high-pass
Which is measured in microvolts? - answer signal strength
What forces electrons to move in a circuit? - answer electromotive force
Which technique is used to quantify EEG amplitude within specific frequency bands? -
answer Fast Fourier Transportation
EEG signals are converted into ______ during optical isolation. - answer light
Which common mode rejection ratio specification would you prefer in an
electroencephalograph? - answer 110 dB
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