Affordable Access

Publisher Website

The P18 component of the median nerve SEP recorded from a posterior to anterior neck montage

Authors
Journal
Clinical Neurophysiology
1388-2457
Publisher
Elsevier
Volume
123
Issue
10
Identifiers
DOI: 10.1016/j.clinph.2012.03.010
Keywords
  • Somatosensory Evoked Potential
  • Median Nerve
  • Primary Afferent Depolarisation
  • Vibration
  • Double-Pulse Stimulation
  • Cord Dorsum Potential

Abstract

Abstract Objective To investigate the P18 component in the posterior to anterior neck montage after median nerve stimulation. Methods Somatosensory evoked potentials, through electrical wrist stimulation, were collected. In 12 subjects, the presence of the P18 component was evaluated in the posterior to anterior neck montage. In 10 subjects, the effects of simultaneous vibration of the hand were evaluated. In five subjects, responses after double-pulse stimulation (ISI 20ms) were evaluated. Results The P18 component was identified in all subjects. Vibration reduced the amplitude of all components except the P18 and N18. Double-pulse stimulation reduced the amplitude of the P18 and the N18 components without significantly changing the amplitude of the other components. Conclusions The posterior to anterior neck montage allows for recording the P18 component. The amplitude reduction of all components during vibration, except N18 and P18, is interpreted as reflecting inhibitory activities at the cuneiform nucleus and at the segmental dorsal horn of the spinal cord, respectively. The reduction in the P18 component after double-pulse stimulation is compatible with previous observations on the positive component of cord dorsum potentials. Significance Studying this component may add to the knowledge of the function of the spinal cord in humans.

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

Latency and amplitude abnormalities of the scalp f...

on Electroencephalography and cli... 1988

Latency and amplitude abnormalities of the scalp f...

on Electroencephalography and Cli... Jan 01, 1988

P30 and N33 of posterior tibial nerve SSEPs are an...

on Electroencephalography and Cli... Jan 01, 1993

P30 and N33 of posterior tibial nerve SSEPs are an...

on Electroencephalography and cli... 1993
More articles like this..