Knowledge Assessment for Neuromonitoring
1. How do you determine if continuous artifact is 60Hz?
observe and measure artifact, isolate noise,
2. Explain why MEP monitoring is more sensitive to SEP to spinal cord ischemia.
separate flow of blood to anterior and posterior part of spinal cord
3. Explain the relationship between SEP, cerebral blood flow, and reversible vs cortical damage.
4. Explain why SEP recordings reverse polarity across the central sulcus.
5. Which polarity of stimulation is appropriate for a) transcranial stimulation; b) cortical stimulation; c) subcortical stimulation; d) cranial nerve stimulation; e) nerve stimulation? Explain why in each case
6. When are 60 Hz notch filters useful, and when must they be avoided? Why?
7. Why do the optimal filter setting differ for a) EEG; b) ABR; c) MEP; d) EMG; e) SEP; f) peripheral SEP (ie, Erb's point)? Give approximate ranges for each.
8. What are appropriate amplifier sensitivity settings for a) EEG; b) ABR; c) EMG; d) MEP? What are the potential consequences of inappropriate sensitivity?
9. Describe at least 3 different methods for increasing the signal/noise ratio of evoked potential recordings, and explain the advantages and disadvantages.
10. What are the recommended actions in the even of significant deterioration recordings?
observe and measure artifact, isolate noise,
2. Explain why MEP monitoring is more sensitive to SEP to spinal cord ischemia.
separate flow of blood to anterior and posterior part of spinal cord
3. Explain the relationship between SEP, cerebral blood flow, and reversible vs cortical damage.
4. Explain why SEP recordings reverse polarity across the central sulcus.
5. Which polarity of stimulation is appropriate for a) transcranial stimulation; b) cortical stimulation; c) subcortical stimulation; d) cranial nerve stimulation; e) nerve stimulation? Explain why in each case
6. When are 60 Hz notch filters useful, and when must they be avoided? Why?
7. Why do the optimal filter setting differ for a) EEG; b) ABR; c) MEP; d) EMG; e) SEP; f) peripheral SEP (ie, Erb's point)? Give approximate ranges for each.
8. What are appropriate amplifier sensitivity settings for a) EEG; b) ABR; c) EMG; d) MEP? What are the potential consequences of inappropriate sensitivity?
9. Describe at least 3 different methods for increasing the signal/noise ratio of evoked potential recordings, and explain the advantages and disadvantages.
10. What are the recommended actions in the even of significant deterioration recordings?