ABRET (3) Questions with verified answers.

What type of montage is shown in this sample? correct answers Referential Montage Which montage would best display the amplitude of a left temporal spike? correct answers Left temporal to the contralateral ear Referential recording is most appropriate for measuring? correct answers Voltage How can a defective electrode be identified? correct answers 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...? correct answers 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? correct answers Contralateral ear reference When using the average reference, if a spike-and-wave focus appears at C3, the abnormality would be best enhanced by? correct answers 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? correct answers S= 5 microvolts/mm, LFF=5 Hz, HFF = 70 Hz In a referential montage localization is determined by? correct answers Amplitude Switching an effective electrode located in a bad pin position and a good electrode located in working pin position will result in..? correct answers 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...? correct answers 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 correct answers Does not change spike amplitude or duration - it shrinks the picture of the displayed waves Which of the following setting is most sensitive correct answers 2 µV/mm A waveform of 0.5 Hz can be best enhanced with a filter of correct answers LFF of 0.3 Hz Which of the following time constants would best display delta activity? correct answers 1.0 second Time constant correct answers Low frequency filter