EEG BOARD PREP 2023 (A+ GRADED SOLUTIONS)

The EEG amplifier is designed so that when input 1 is more negative than input 2, the deflection will be correct answers UPWARD Common Mode Rejection correct answers the characteristic of an amplifier that rejects external interference WHICH OF THE FOLLOWING IS MOST ATTENUATED BY A LOW FREQUENCY FILTER OF 1HZ correct answers 0.1 HZ TIME CONSTANT IS DEFINED AS THE TIME REQUIRED TO... correct answers FOR THE DEFLECTION TO FALL (DECAY) TO 67% OF THE PEAK DEFLECTION An EEG record has 3/sec spike & wave discharges. Both the spike and the slow wave have voltages of 100uV. If this discharge is recorded with a LFF of 5Hz and a sensitivity of 10uV/mm, what would be the deflection of the spike and the wave? a. spike 10mm & wave 6mm b. spike 6mm & wave 10mm c. spike 10mm & wave 10mm d. spike 6mm & wave 6mm correct answers SPIKE 10MM, WAVE 6MM A HIGH FREQUENCY SETTING OF 35HZ WOULD ATTENUATE 50HZ MUSCLE ACTIVITY BY APPROXIMATELY WHAT PERCENTAGE? correct answers 40% ACCORDING TO ACNS GUIDELINES, RECORDING CLINICAL EEG ON DIGITAL MEDIA REQUIRES MONITORS TO HAVE WHAT correct answers BETWEEN 25 AND 35MM/SECOND HORIZONTAL SCALING AND A MINIMUM OF 100 DATA POINTS/SECOND TO ACCURATELY DISPLAY EEG ON THE MONITOR SCREEN IN A RECORD WITH 10HZ ALPHA ACTIVITY. WHEN THE DISPLAY EPOCH IS CHANGED FROM 10 SECONDS PER DISPLAY SCREEN TO 20 SECONDS PER DISPLAY SCREEN, THE FREQUENCY OF THE ACITIVTY WILL BE WHAT? correct answers 10HZ GUIDELINES FOR RECORDING DIGITAL EEG ARE WRITTEN BY WHO? correct answers THE AMERICAN CLINICAL NEUROPHYSIOLOGY SOCIETY (ACNS) THE TERM RAM MEANS WHAT correct answers TEMPORARY MEMORY STORAGE THAT IS CRITICAL TO RAPID COMPUTER OPERATIONS THE ELECTRODE SITE THAT IS LOCATED 1CM ABOVE, ONE THIRD THE DISTANCE OUT FROM THE LEFT EXTERNAL AUDITORY MEATUS TOWARDS THE LEFT OUTER CANTHUS IS CALLED WHAT correct answers T1 OR F9 Due to a central scalp lesion, C4 has to be relocated 4mm anteriorly. The technologist should: a. relocate C3 4mm anteriorly