EEG BOARD Prep (Part 1) Complete Solution

EEG BOARD Prep (Part 1) The basic unit for measuring current flow is: a. atomic weight b. Coulomb c. Volt d. Ampere d. ampere The basic unit of resistance is: a. Ohm b. Coulomb c. Ampere d. Volt a. ohm Which of the following is NOT a valid expression of Ohm's Law: a. R=EI or (R=VI) b. E=IR or (V=IR) c. I=E/R or (I=V/R) d. R=E/I or (R=V/I) a. R=EI or (R=VI) Which of the following is NOT a unit for measuring alternating frequencies: a. cycles per second b. volts c. hertz d. kilocycles b. volts Which of the following describes the action of a capacitor? a. opposes changes in current flow b. converts A/C to D/C c. creates a direct current resistance d. stores energy d. stores energy A circuit that allows some frequencies to pass through it, while others are blocked is a: a. resistor b. transistor c. filter d. reactor c. filter A combination of electronic components designed to increase the power, voltage or current of a signal: a. amplifier b. line filter c. master gain control d. sensitivity a. amplifier A small fluctuating output recorded by the EEG instrument even when there is no input signal is called: a. output voltage b. linear distortion c. 60Hz interference d. noise d. noise The EEG amplifier is designed so that when input 1 is more negative than input 2, the deflection will be upward Common mode rejection is: a. the ability of an amplifier to cancel out ECG artifact b. the characteristic of an amplifier that rejects external interference c. is dependent on the sampling rate d. controlle by the 60-cycle notch filter b. the characteristic of an amplifier that rejects external interference Which of the following is most attenuated by a low frequency filter of 1 Hz? a. 0.5 Hz b. 5.0 Hz c. 10.0 Hz d. 0.1 Hz d. 0.1 Hz Time constant is defined as the time required for the deflection to fall (decay): a. to 47% of the peak deflection b. 57% of the peak deflection c. 77% of the peak deflection d. to 37% of the peak deflection d. to 37% 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 a. spike 10mm wave 6mm A high frequency setting of 35Hz would attenuate 50Hz muscle activity by approximately what percentage: a. 10% b. 20% c. 40% d. 100% c. 40% According to ACNS Guidelines, Recording on Clinical EEG on Digital Media requires monitors to have between 25 & 35mm/second horizontal scaling and a: a. maximum of 1,000 data points/second to accurately display EEG on the