Affordable Access

Publisher Website

Nasopharyngeal recordings of somatosensory evoked potentials document the medullary origin of the N18 far-field

Authors
Journal
Electroencephalography and Clinical Neurophysiology/Evoked Potentials Section
0168-5597
Publisher
Elsevier
Publication Date
Volume
80
Issue
6
Identifiers
DOI: 10.1016/0168-5597(91)90131-g
Keywords
  • Nasopharyngeal Electrode
  • Somatosensory Evoked Potentials
  • P14 Far-Field
  • Negative Far-Field Potential
  • N18 Far-Field
  • Non-Cephalic Reference
  • Cuneate Nucleus

Abstract

Abstract Because the nasopharyngeal electrode provides non-invasive access to the ventral brain-stem at the medullo-pontine level we used it for recording somatosensory evoked potentials (SEPs) to median nerve stimulation (non-cephalic reference). After the P9 and P11 far-fields, the nasopharyngeal SEPs disclosed a negative-going component which was interpreted as the near-field equivalent of the P14 scalp far-field generated in the caudal part of the medial lemniscus. Nasopharyngeal SEPs also revealed a large N18 with voltage and features strikingly similar to those of the scalp-recorded N18 far-field. These results suggest that N18 is generated in the medulla and not more rostrally in the brain-stem. The use of a nasopharyngeal electrode as reference for topographic brain mapping is discussed. The paper documents the feasibility and relevance of nasopharyngeal recordings for non-invasive analysis of short-latency SEPs.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Nasopharyngeal recordings of somatosensory evoked...

on Electroencephalography and cli... 1991

Origin of N18 and P14 far-fields of median nerve s...

on Electroencephalography and cli... February 1996

Origin of N18 and P14 far-fields of median nerve s...

on Electroencephalography and Cli... Jan 01, 1996

Origins of cat somatosensory far-field and early n...

on Electroencephalography and cli... February 1982
More articles like this..