ABRET EXAM QUESTIONS WITH
VERIFIED ANSWERS
The most common symptoms of which type of head injury are a temporary loss of
consciousness, followed by confusion, severe headache, and possibly amnesia for the
accident? - Answer- Concussion
Which infection is most likely to produce headache, fever, nuchal rigidity, coma, and
death? - Answer- Meningitis
The "dance-like" movements of the head and extremities may be exhibited in a patient
with which hereditary degenerative disease? - Answer- Huntington's chorea
Without dietetic treatment, this hereditary disease may cause mental retardation and
infantile spasms - Answer- Phenylketonuria
Herniation of the uncus results in compression of which cranial nerve? - Answer- CN III
- Oculomotor
The amount by which the differential amplifier increases the magnitude of the input
signal is...? - Answer- Sensitivity
What is a device that alters the frequency composition of a signal? - Answer- Filter
High data sampling rates in a digital EEG Machine creates... - Answer- smooth,
connected lines
Which of the following is not useful in digital EEG recordings? - Answer- Bio-calibration
Slow sampling rate may cause fast frequencies to appear slower, the term for this is...?
- Answer- Aliasing
Digital EEG montages are reformatted by using... - Answer- an average reference
Clipping of the waveforms occurs when? - Answer- the signal is outside the range of the
digitizer
What is voltage resolution? - Answer- an analog-to-digital converter
, What occurs when a signal common to both inputs when using a differential amplifier
has like frequencies, amplitudes, and phases are - Answer- cancellation
What kind of amplifier uses Common Mode Rejection? - Answer- A differential amplifier
In a differential amplifier, if input 1 receives a voltage of +50 µV and input 2 a voltage -
100 µV, the output voltage and deflection would be approximately...? - Answer- 150 µV
downward
The sharpness of the frequency response curve is determined by the filters - Answer-
Roll-off
The amount by which the differential amplifier increases the magnitude of the input
signal is dependant on...? - Answer- Sensitivity
A device that alters the frequency composition of a signal is...? - Answer- Filter
The ability of an amplifier to reject like signals is called...? - Answer- Common Mode
Rejection
The basic unit for measuring current flow is...? - Answer- Ampere
The basic unit of resistance is...? - Answer- Ohm
Which of the following is not a unit for measuring alternating frequencies? - Answer-
Volts
Which of the following describes the action of a capacitor? - Answer- Stores energy
A circuit that allows some frequencies to pass through it, while other are blocked is
called a...? - Answer- Filter
A combination of electronic components designed to increase the power, voltage or
current of a signal is called...? - Answer- an amplifier
A small fluctuating output recorded by the EEG instrument even when there is no input
signal is called...? - Answer- noise
The EEG amplifier is designed so that when input 1 is more negative than input2, the
deflection will be...? - Answer- an upward deflection
Common Mode Rejection is - Answer- the characteristic of an amplifier that rejects
external interference
Which of the following is most attenuated by a low frequency filter of 1 Hz? - Answer-
0.1 Hz
VERIFIED ANSWERS
The most common symptoms of which type of head injury are a temporary loss of
consciousness, followed by confusion, severe headache, and possibly amnesia for the
accident? - Answer- Concussion
Which infection is most likely to produce headache, fever, nuchal rigidity, coma, and
death? - Answer- Meningitis
The "dance-like" movements of the head and extremities may be exhibited in a patient
with which hereditary degenerative disease? - Answer- Huntington's chorea
Without dietetic treatment, this hereditary disease may cause mental retardation and
infantile spasms - Answer- Phenylketonuria
Herniation of the uncus results in compression of which cranial nerve? - Answer- CN III
- Oculomotor
The amount by which the differential amplifier increases the magnitude of the input
signal is...? - Answer- Sensitivity
What is a device that alters the frequency composition of a signal? - Answer- Filter
High data sampling rates in a digital EEG Machine creates... - Answer- smooth,
connected lines
Which of the following is not useful in digital EEG recordings? - Answer- Bio-calibration
Slow sampling rate may cause fast frequencies to appear slower, the term for this is...?
- Answer- Aliasing
Digital EEG montages are reformatted by using... - Answer- an average reference
Clipping of the waveforms occurs when? - Answer- the signal is outside the range of the
digitizer
What is voltage resolution? - Answer- an analog-to-digital converter
, What occurs when a signal common to both inputs when using a differential amplifier
has like frequencies, amplitudes, and phases are - Answer- cancellation
What kind of amplifier uses Common Mode Rejection? - Answer- A differential amplifier
In a differential amplifier, if input 1 receives a voltage of +50 µV and input 2 a voltage -
100 µV, the output voltage and deflection would be approximately...? - Answer- 150 µV
downward
The sharpness of the frequency response curve is determined by the filters - Answer-
Roll-off
The amount by which the differential amplifier increases the magnitude of the input
signal is dependant on...? - Answer- Sensitivity
A device that alters the frequency composition of a signal is...? - Answer- Filter
The ability of an amplifier to reject like signals is called...? - Answer- Common Mode
Rejection
The basic unit for measuring current flow is...? - Answer- Ampere
The basic unit of resistance is...? - Answer- Ohm
Which of the following is not a unit for measuring alternating frequencies? - Answer-
Volts
Which of the following describes the action of a capacitor? - Answer- Stores energy
A circuit that allows some frequencies to pass through it, while other are blocked is
called a...? - Answer- Filter
A combination of electronic components designed to increase the power, voltage or
current of a signal is called...? - Answer- an amplifier
A small fluctuating output recorded by the EEG instrument even when there is no input
signal is called...? - Answer- noise
The EEG amplifier is designed so that when input 1 is more negative than input2, the
deflection will be...? - Answer- an upward deflection
Common Mode Rejection is - Answer- the characteristic of an amplifier that rejects
external interference
Which of the following is most attenuated by a low frequency filter of 1 Hz? - Answer-
0.1 Hz
