How are spinal somatosensory evoked potentials (SEPs) recorded?

Updated: Feb 26, 2019
  • Author: Sombat Muengtaweepongsa, MD, MSc; Chief Editor: Selim R Benbadis, MD  more...
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Spinal SEPs are recorded by electrodes placed on the skin surface over the spine as described above. They are considerably smaller in amplitude than SEPs recorded over the scalp. However, the difference in latency between the scalp and the cervical or limb SEPs is a measure of central sensory conduction, assessment of which remains the chief clinical goal of recording SEPs. Thoracolumbar spinal SEPs are even smaller than cervical spinal SEPs and can be difficult to record, especially in obese subjects.

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