EEG BOARD PREP MOCK EXAM #2| 151 QUESTIONS| WITH COMPLETE SOLUTIONS

The filters creating a very narrow band pass that should rarely be used clinically are___? Correct answer: lf 5.0 hz and hf 15 hz During the recording of cerebral activity, the calibration input voltage is changed from 50 ocv to 100 ocv. What will the result be? Correct answer: no effect on the activity being recorded A spike is printed out on paper and measures 16mm peak to peak, the sensitivity of the instrument is 7uv/mm and a calibration signal of 50uv causes a deflection of 7.1mm...what is the voltage of the spike? A. 1.2uv B. 112uv C. 12uv D. 24uv correct answer: 112 ocv What input voltage is necessary to give a calibration deflection between 5 and 10mm if the sensitivity is 30uv/mm? A. 10uv B. 50uv C. 100uv D. 200uv correct answer: 200 ocv According to acns guidelines, the minimum sampling rate for eeg data should be at least ____ times the highest frequency filter setting correct answer: three The best metals for clinical recording are what? Correct answer: silver silver chloride, platinum, or gold Which electrodes do not record directly from the brain? Correct answer: subdermal Which of the following is not related to measuring electrode resistance? A. Opposion to direct current flow B. Measurement while the electrode is unattached to scalp C. Measurement with an ohmmeter D. Opposition to alternating current flow correct answer: oppositon to alternating current flow The distance from cz to pz is 6.8cm. What is the distance from nasion to inion? Correct answer: 34 cm A patient can become the pathway for least resistance and therefore electrically susceptible to shock when_____? Correct answer: the patient has an indwelling heart catheter Eye leads placed at the outer canthus of each eye will record: A. All eye movements B. Horizontal & vertical eye movements C. Only vertical eye movements D. Mainly horizontal eye movements correct answer: mainly horizontal eye movements Which is not a physiological artifact? A. Perspiration B. Glossokinetic response C. 60 hz interference