SSEPs questions with correct answers

When recording a posterior tibial nerve SSEP, the Fpz ‐ C5s channel records - Answer subcortical far ‐ field potentials In the 10 ‐ 20 system of electrode placement, the point 20% (of the nasion‐inion distance) anterior to Cz is called - Answer Fz An electrode measured 20% lateral to Cz on the right using 10 ‐ 20 system is - Answer C4 P14 is a far ‐ field, subcortically generated response which probably reflects - Answer caudal medial lemniscal activity If over three hours the PTN cortical response attenuates while subcortical is stable: - Answer Keep monitoring subcorticals In general, filter settings for SEP recordings - Answer can be narrower for cortical than peripheral responses The initial waveform recorded of a near ‐ field PTN cortical potential is - Answer positive due to electrotonic depolarization of the membrane under the recording electrode A patient is admitted to the operating room diagnosed with a herniated cervical disc at C 5/6. The most appropriate nerve(s) to monitor during the resulting surgical procedure would be the: - Answer median and posterior ti