ABCN Sample Questions & Key ABCN Sample Questions Revised 8/11 1. Regarding aliasing: a. b. c. d. 2. Which of the following is a disadvantage of digital EEG compared to analog (paper) EEG: a. b. c. d. 3. Synchrony Negative-positive-negative deflections Continuity Anterior to posterior lag time Which of the following montages will best demonstrate waves II through V of the BAEP? a. b. c. d. 6. an IPSP in superficial cortical dendrites an EPSP in deep cortical dendrites an EPSP in superficial cortical dendrites all of the above Typical triphasic waves have all the following characteristics except: a. b. c. d. 5. Lower cost of storage. Transferability. Ease of remontaging. Alignment of high-amplitude waveforms. A surface negative EEG wave will result from: a. b. c. d. 4. Aliasing occurs when the sampling frequency is too high. A high-pass filter is least useful in minimizing aliasing. Filtering has no effect on aliasing. The frequency content of the signal is does not need to be known. Cz - contralateral ear Cz – ipsilateral ear Ipsilateral ear – contralateral ear Ipsilateral ear – Fpz EEG signs of normal drowsiness [NREM Stage 1 (N1) sleep] include all of the following expect: a. b. c. d. alpha activity moves anteriorly bursts of generalized theta activity left anterior temporal delta activity increased beta activity 1 ABCN Sample Questions & Key 7. Of the responses below, which is the best response in describing the EEG findings on the following invasive EEG done with implanted bilateral anterior and mid temporal subdural strips? a. b. c. d. A right hemispheric seizure onset is seen The pattern is diagnostic of hippocampal onset The left focal slowing and the right focal seizures indicate a poor surgical candidate Clinical features are best when <10 seconds before EEG onset 8. All of the following statements regarding frontal lobe epilepsy (FLE) are true except: a. There is always an ictal EEG correlate to frontal lobe seizures. b. In FLE, generalized seizures are usually present, and may be frequent. c. There may be minimal post-ictal state. d. They often occur in clusters and are nocturnal. 9. When recording evoked potentials, the changes of high or low analog frequency filters affects: a. latency 2 ABCN Sample Questions & Key b. c. d. 10. amplitude latency and amplitude periodicity The voltage of transcranial electric stimulation that is required to elicit motor response is generally: a. b. c. d. less than 10 volts 10 – 20 volts 20 – 200 volts greater than 200 volts 3 ABCN Sample Questions & Key Answers for Sample Questions 1. B 2. B 3. C 4. C 5. A 6. C 7. A 8. A 9. C 10. D 4