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ABRET Exam Prep (Latest Update) Verified Questions
and Answers (100% Guaranteed Pass)
Which is important to document to aid in interpretation? a) low grade fever b) uncooperative pt c) pt was awake and alert during recording d) HV was not performed due to asthma c What additional electrodes could help decipher b/w artifact and cortical activity? a) respiration transducer b) sphenoidal c) EMG d) EOG d What additional monitoring should be done in a middle age pt who repeatedly alerts from sleep during EEG? a) eye movement b) movement c) muscle tone d) respiration d
Which of the following extra electrodes might best demonstrate the EEG activity associated with focal motor twitching of the right corner of the mouth? a) P b) FT9 (T1) c) C d) C d An abbreviated 10-20 placement, respiration, ECG, and EOG a) neonates b) toddlers c) ICU pts d) Elderly pts a Cortical EEG recording can be obscured in pts who are tense and anxious due to a) multifocal spikes b) delta slowing c) generalized spike wave d) myogenic artifact d What type of monitoring would be useful in an EEG pt experiencing syncope? a) movement transducer b) respiration transducer c) EOG
a) ear lobes b) mastoids c) neck d) Cz d 14 & 6Hz positive spikes are best recorded w/ a) avg reference b) contralateral ear reference c) bipolar chain d) both ears connected to reference b Which montage would best display the amp of a left temp spike? a) left temp to ipsi ear b) left temp to contra ear c) ant-post bipolar temp chain d) transverse (coronal) bipolar chain b BEST choice of reference to be used when recording in suspected temp lob epilepsy a) A1+A b) ipsi ear c) Cz d) nasopharyngeals c
Which settings will help enhance a low volt slow wave that's being masked by muscle activity? a) sens 2; LF 5; HF 35 b) sens 10; LF 1; HF 5 c) sens 5; LF 0.3; HF 35 d) sens 7; LF 1; HF 70 c Most appropriate setting change that should be made to enhance cortical slowing? a) change LFF from 1Hz to 0.1Hz b) change HFF from 70Hz to 15Hz c) change LFF from 1Hz to 5Hz d) change HFF from 70Hz to 25Hz a When using avg reference, if a spike-and-wave focus appears at C3, the abnormality would be best enhanced by a) using 35Hz filter and time constant of 0.03sec b) decreasing sensitivty c) excluding C3 and surrounding electrodes from reference d) switching to Cz referential montage c Which setting could be used to reduce the effects of sweat artifact in a pt w/ asymmetrical low-volt fast activity?
a Waveform of 0.5Hz can best be enhanced w/ a filter of a) LF 0.3Hz b) HF 35Hz c) LF 5Hz d) LF 1Hz a Referential recording is most appropriate for measuring a) freq b) phase c) duration d) volt d To enhance the background alpha and beta asymmetry in a recording showing moderately high volt delta activity, the tech should use a) shorter time constant and decreased sens b) longer time constant and increased sens c) longer time constant and decreased sens d) shorter time constant and increased sens d Nyquist sampling rate for 100Hz waveforms
a) 50 samples/sec b) 25 samples/sec c) >100 samples/sec d) >200 samples/sec d Input impedance should be a) equal to the common mode rejection ratio b) less than the common mode rejection ratio c) very low d) very high d Which of the following is the most appropriate sampling rate used for a HFF setting of 70Hz? a) 30 per sec b) 210 per sec c) 140 per sec d) 10 per sec b Minimal horizontal resolution a) 16 bits b) 16 Hz c) 8 Hz d) 8 bits b
c) the signal is outside the range of the digitizer d) the sampling rate is too fast c What percentage of actual amplitude will be visible of 15Hz wave when using 15Hz HFF? a) 0. b) 0. c) 0. d) 0. d The ability of an amplifier to reject like signals a) sensitivity b) amplifier gain c) common mode rejection d) phase reversal c Long time constant a) 1Hz LFF b) 35Hz HFF c) 0.1Hz LFF d) 70Hz HFF c
undersampling a) fast fourier transform b) impedance c) aliasing d) common mode rejection c How many bits of resolution is required? a) 16 b) 8 c) 13 d) 10 a Setting change resulting in the elimination of cortical spikes a) 70Hz HFF to 15Hz b) 1Hz LFF to 0.1Hz c) 70Hz HFF to 100Hz d) 1Hz LFF to 5Hz a Signals common to both inputs of a differential amplifier w/ like freq, amp, and phase are a) amplified b) canceled c) attenuated 63% d) attenuated 7%
a) fast fourier transform b) impedance meter c) differential amplifier d) A/D converter d CMRR of at least a) 70Hz b) 90Hz c) 90dB d) 70dB c Gradual changes in amp, freq, or spatial distribution of rhythms a) background activity b) asymmetry c) attenuation d) evolution d Time constant that best displays delta activity a) 0.3 sec b) 0.1 sec c) 1 sec d) 0.5 sec c
60Hz notch filter would have the greatest effect on a waveform w/ a duration of a) 10msec b) 16msec c) 50msec d) 25msec b All favor cancellation of signals, except a) equal impedances in the inputs b) unequal impedances in the inputs c) shorter inter-electrode distance d) cerebral potentials in common mode b Most appropriate sampling rate that should be used for a 70Hz HFF, according to Nyquist theory a) 210 p/sec b) 10 p/sec c) 140 p/sec d) 20 p/sec c Time constant of 0.5sec a) 15Hz low pass filter b) 0.3Hz high pass filter
5Hz LFF will attenuate a 5Hz wave by a) 5mm b) 0. c) 0. d) 30mm b Converts the time function into a sine wave of different freq a) differential amplifier b) impedance meter c) fast fourier transform d) A/D converter c Freq response curve a) duration b) input impedance c) sensitivity d) filters d Doubling the inter-electrode distances will have what effect on the waveforms? a) no effect b) decrease muscle artifact c) increase slow activity d) increase amp
d High data sampling rates in a digital EEG machine create a) low amp EEG activity b) long EEG recordings c) choppy, rigid lines d) smooth, connected lines d The amount by which the differential amplifier increases the magnitude of the input signal is its a) resistance b) filter c) sensitivity d) input impedance c vertical resolution a) amplitude b) freq d) duration d) bits a Sharpness of the freq response curve is determined by the filter a) capacitance
What is the specification of the minimum sampling rate used, in relation to the highest freq signal recorded? a) nyquist theory b) paley-winer theorem c) ohm's theory d) coulombs law a Which of the following sites is the most commonly used for the ground electrode in EEG? a) Fpz b) Fz c) Pz d) Oz a EEG amplifiers work on the principles of a) aliasing b) differential discrimination c) differentiation and amplification d) amplification c Which of the following principles best applies to EEG amplifiers? a) filtering b) aliasing
c) common mode rejection d) sampling c Which of the following most closely relates to the ratio of an amplifiers output to input signal? a) impedance b) system gain c) display sensitivity d) CMRR a If LFF is changed from 1Hz to 5Hz, how will a 2Hz slow wave be affected? a) accentuation b) minimal attenuation c) no affect d) significant attentuation d Common mode rejection a) differential amplifier b) bipolar amplifier c) half cycle amplifier d) referential amplifier a
