How are somatosensory evoked potentials (SEPs) recorded and filtered?

Updated: Oct 25, 2019
  • Author: Andrew B Evans, MD; Chief Editor: Selim R Benbadis, MD  more...
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Surface or needle electrodes may be used. Cephalic bipolar or referential recording montages are appropriate. The general setting for filtering is 10-2500 Hz.

Upper-extremity channels are as follows:

  • Channel 1 - C3/C4 referenced to Fz

  • Channel 2 - Second cervical spinous process to Erb point

  • Channel 3 - Fz to contralateral cortex

Lower-extremity channels are as follows:

  • Channel 1 - L1, L3 to hip

  • Channel 2 - Cz- Fpz

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