ABRET (3) QUESTIONS AND ANSWERS 2023

ABRET (3) QUESTIONS AND ANSWERS 2023 What type of montage is shown in this sample? Referential Montage Which montage would best display the amplitude of a left temporal spike? Left temporal to the contralateral ear Referential recording is most appropriate for measuring? Voltage How can a defective electrode be identified? Placing a bad electrode with high impedance into a pin position with working non reference electrode will result high impedance To confirm the integrity of a poorly recording electrode, the tech should...? Replace the electrode with a low impedance in the connection of the poorly recording electrode and recheck impedance 14- and -6/sec Hz positive spikes are best demonstrated with a reference to? Contralateral ear reference When using the average reference, if a spike-and-wave focus appears at C3, the abnormality would be best enhanced by? Excluding C3 and surrounding electrodes from reference A patient with suspected asymmetrical low-voltage fast activity is observed to have a sweat artifact during the EEG recording. Which of the following EEG settings could be used to reduce the effects of the artifact? S= 5 microvolts/mm, LFF=5 Hz, HFF = 70 Hz In a referential montage localization is determined by? Amplitude Switching an effective electrode located in a bad pin position and a good electrode located in working pin position will result in..? Bad electrode-high impedance in a good pin position; good electrode- high impedance in bad pin position A defective headbox pin can be identified by...? Placing a non reference electrode with low impedance into a bad pin will result low impedance Increasing the number of seconds displayed on the monitor Does not change spike amplitude or duration - it shrinks the picture of the displayed waves Which of the following setting is most sensitive 2 µV/mm A waveform of 0.5 Hz can be best enhanced with a filter of LFF of 0.3 Hz Which of the following time constants would best display delta activity? 1.0 second Time constant Low frequency filter A 0.5 Hz wave is enhanced without affecting a spike by using...? a LFF 0.3 Hz Frequency Response Curve Filters The 60 Hz notch filter will have the greatest effect on a waveform having a duration of 16mm/sec A slow wave focus is best seen with...? LFF 0.3 Hz, PPS of 15 mm/sec With high frequency filtering, muscle artifact may become distorted and look like...? Beta activity Which combination settings will help enhance a low voltage slow wave that is being masked by muscle activity? Sensitivity of 5µV; LFF of 0.3 Hz; HFF of 35 Hz Which of the following is important for the technologist to document in order to aid in interpretation? If the patient was awake and alert during the recording Sharply contoured, surface positivity, and seen in clusters over the occipital lobe during drowsiness, describes... POSTS What waveform is seen in stage 2 sleep and during arousals, and contains 3 components: sharp, slow and fast? K-complex EEG with a very tense and anxious patient shows...? Widespread low voltage activity A Glossokinetic Artifact is Biological Artifact that is caused by movement of people Electrostatic artifact The EEG activity seen maximally from the frontal leads is best described as Bifrontal myogenic artifact/Eye blink artifact What is the value of recording a patient's maximal awake state? To distinguish slowing from drowsiness Which of the following is normal activity seen in the occipital regions when a patient's eyes are scanning a detailed picture? Lambda Bancaud's phenomenon, alpha squeak and paradoxical alpha all have to do with...? a reaction of the background (PDR) A common electrographic correlate of a seizure Rhythmic activity During hyperventilation, a 9-year-old patient develops generalized 100-300 µV slowing. If, within thirty seconds post hyperventilation, the record returns to its pre-hyperventilation state, the reaction would be...? A normal response to hyperventilation