Scalp distribution of the earliest cortical somatosensory evoked potential to tibial nerve stimulation: Proposal of a new recording montage

Massimiliano Valeriani, Domenico Restuccia, Domenica Le Pera, Carmen Barba, Pietro Tonali

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Objective: To investigate the most reliable method to record the earliest cortical somatosensory evoked potential (SEP) after tibial nerve stimulation. The 'gating' phenomenon was used to dissociate the overlapping cortical SEP components. Methods: In 11 subjects we recorded the scalp SEPs at rest, during the voluntary (active gating) and passive (passive gating) foot movement and during the isometric calf muscle contraction (isometric gating). Results: At the vertex the P40 amplitude was reduced in all the gating conditions. Instead, both the P40 response recorded in the parietal region ipsilateral to the stimulation (indicated as P40par) and the fronto-temporal N37 potential were reduced in amplitude only during the passive foot movement. Conclusions: The same behaviour of the N37 and P40par potentials suggests that they can represent the opposite counterparts of the same dipolar generator. Instead, the real P40 amplitude, which is affected in all the gating conditions, is recorded at the vertex and might be generated by a different source. We conclude that the montage obtained by referring a temporal electrode contralateral to the stimulation to an ipsilateral parietal lead can reliably record the earliest cortical component (N37/P40par) after tibial nerve stimulation. Copyright (C) 2000 Elsevier Science Ireland Ltd.

Original languageEnglish
Pages (from-to)1469-1477
Number of pages9
JournalClinical Neurophysiology
Volume111
Issue number8
DOIs
Publication statusPublished - Aug 1 2000

Fingerprint

Tibial Nerve
Somatosensory Evoked Potentials
Scalp
Foot
Parietal Lobe
Muscle Contraction
Electrodes
adjuvant P40

Keywords

  • Gating
  • Recording technique
  • Somatosensory evoked potentials
  • Tibial nerve

ASJC Scopus subject areas

  • Clinical Neurology
  • Radiology Nuclear Medicine and imaging
  • Neurology
  • Sensory Systems
  • Physiology (medical)

Cite this

Scalp distribution of the earliest cortical somatosensory evoked potential to tibial nerve stimulation : Proposal of a new recording montage. / Valeriani, Massimiliano; Restuccia, Domenico; Le Pera, Domenica; Barba, Carmen; Tonali, Pietro.

In: Clinical Neurophysiology, Vol. 111, No. 8, 01.08.2000, p. 1469-1477.

Research output: Contribution to journalArticle

@article{4b09109f320346a2a8859cf7b4d789e8,
title = "Scalp distribution of the earliest cortical somatosensory evoked potential to tibial nerve stimulation: Proposal of a new recording montage",
abstract = "Objective: To investigate the most reliable method to record the earliest cortical somatosensory evoked potential (SEP) after tibial nerve stimulation. The 'gating' phenomenon was used to dissociate the overlapping cortical SEP components. Methods: In 11 subjects we recorded the scalp SEPs at rest, during the voluntary (active gating) and passive (passive gating) foot movement and during the isometric calf muscle contraction (isometric gating). Results: At the vertex the P40 amplitude was reduced in all the gating conditions. Instead, both the P40 response recorded in the parietal region ipsilateral to the stimulation (indicated as P40par) and the fronto-temporal N37 potential were reduced in amplitude only during the passive foot movement. Conclusions: The same behaviour of the N37 and P40par potentials suggests that they can represent the opposite counterparts of the same dipolar generator. Instead, the real P40 amplitude, which is affected in all the gating conditions, is recorded at the vertex and might be generated by a different source. We conclude that the montage obtained by referring a temporal electrode contralateral to the stimulation to an ipsilateral parietal lead can reliably record the earliest cortical component (N37/P40par) after tibial nerve stimulation. Copyright (C) 2000 Elsevier Science Ireland Ltd.",
keywords = "Gating, Recording technique, Somatosensory evoked potentials, Tibial nerve",
author = "Massimiliano Valeriani and Domenico Restuccia and {Le Pera}, Domenica and Carmen Barba and Pietro Tonali",
year = "2000",
month = "8",
day = "1",
doi = "10.1016/S1388-2457(00)00342-4",
language = "English",
volume = "111",
pages = "1469--1477",
journal = "Clinical Neurophysiology",
issn = "1388-2457",
publisher = "Elsevier Ireland Ltd",
number = "8",

}

TY - JOUR

T1 - Scalp distribution of the earliest cortical somatosensory evoked potential to tibial nerve stimulation

T2 - Proposal of a new recording montage

AU - Valeriani, Massimiliano

AU - Restuccia, Domenico

AU - Le Pera, Domenica

AU - Barba, Carmen

AU - Tonali, Pietro

PY - 2000/8/1

Y1 - 2000/8/1

N2 - Objective: To investigate the most reliable method to record the earliest cortical somatosensory evoked potential (SEP) after tibial nerve stimulation. The 'gating' phenomenon was used to dissociate the overlapping cortical SEP components. Methods: In 11 subjects we recorded the scalp SEPs at rest, during the voluntary (active gating) and passive (passive gating) foot movement and during the isometric calf muscle contraction (isometric gating). Results: At the vertex the P40 amplitude was reduced in all the gating conditions. Instead, both the P40 response recorded in the parietal region ipsilateral to the stimulation (indicated as P40par) and the fronto-temporal N37 potential were reduced in amplitude only during the passive foot movement. Conclusions: The same behaviour of the N37 and P40par potentials suggests that they can represent the opposite counterparts of the same dipolar generator. Instead, the real P40 amplitude, which is affected in all the gating conditions, is recorded at the vertex and might be generated by a different source. We conclude that the montage obtained by referring a temporal electrode contralateral to the stimulation to an ipsilateral parietal lead can reliably record the earliest cortical component (N37/P40par) after tibial nerve stimulation. Copyright (C) 2000 Elsevier Science Ireland Ltd.

AB - Objective: To investigate the most reliable method to record the earliest cortical somatosensory evoked potential (SEP) after tibial nerve stimulation. The 'gating' phenomenon was used to dissociate the overlapping cortical SEP components. Methods: In 11 subjects we recorded the scalp SEPs at rest, during the voluntary (active gating) and passive (passive gating) foot movement and during the isometric calf muscle contraction (isometric gating). Results: At the vertex the P40 amplitude was reduced in all the gating conditions. Instead, both the P40 response recorded in the parietal region ipsilateral to the stimulation (indicated as P40par) and the fronto-temporal N37 potential were reduced in amplitude only during the passive foot movement. Conclusions: The same behaviour of the N37 and P40par potentials suggests that they can represent the opposite counterparts of the same dipolar generator. Instead, the real P40 amplitude, which is affected in all the gating conditions, is recorded at the vertex and might be generated by a different source. We conclude that the montage obtained by referring a temporal electrode contralateral to the stimulation to an ipsilateral parietal lead can reliably record the earliest cortical component (N37/P40par) after tibial nerve stimulation. Copyright (C) 2000 Elsevier Science Ireland Ltd.

KW - Gating

KW - Recording technique

KW - Somatosensory evoked potentials

KW - Tibial nerve

UR - http://www.scopus.com/inward/record.url?scp=0034255729&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034255729&partnerID=8YFLogxK

U2 - 10.1016/S1388-2457(00)00342-4

DO - 10.1016/S1388-2457(00)00342-4

M3 - Article

C2 - 10904229

AN - SCOPUS:0034255729

VL - 111

SP - 1469

EP - 1477

JO - Clinical Neurophysiology

JF - Clinical Neurophysiology

SN - 1388-2457

IS - 8

ER -