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Titolo:
Sources of cortical responses to painful CO2 laser skin stimulation of thehand and foot in the human brain
Autore:
Valeriani, M; Restuccia, D; Barba, C; Le Pera, D; Tonali, P; Mauguiere, F;
Indirizzi:
Catholic Univ Sacred Heart, Dept Neurol, I-00168 Rome, Italy Catholic UnivSacred Heart Rome Italy I-00168 eurol, I-00168 Rome, Italy IRCCS, CSS Hosp, San Giovanni Rotondo, Italy IRCCS San Giovanni Rotondo Italy CSS Hosp, San Giovanni Rotondo, Italy Hop Neurol, Funct Neurol & Epileptol Dept, Lyon, France Hop Neurol Lyon France rol, Funct Neurol & Epileptol Dept, Lyon, France
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 6, volume: 111, anno: 2000,
pagine: 1103 - 1112
SICI:
1388-2457(200006)111:6<1103:SOCRTP>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOMATOSENSORY-EVOKED-POTENTIALS; ELECTRICAL SOURCE ANALYSIS; MEDIAN NERVE-STIMULATION; HUMAN CEREBRAL-CORTEX; CO2-LASER STIMULATION; MAGNETIC-FIELDS; SCALP TOPOGRAPHY; NOXIOUS-STIMULATION; HEAT STIMULI; LOCALIZATION;
Keywords:
laser evoked potentials; brain electric source analysis; pain; second somatosensory area; human brain;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Valeriani, M Catholic Univ Sacred Heart, Dept Neurol, L Go A Gemelli 8, I-00168 Rome, Italy Catholic Univ Sacred Heart L Go A Gemelli 8 Rome Italy I-00168
Citazione:
M. Valeriani et al., "Sources of cortical responses to painful CO2 laser skin stimulation of thehand and foot in the human brain", CLIN NEU, 111(6), 2000, pp. 1103-1112

Abstract

Objectives: To investigate whether the same dipolar model could explain the scalp CO2 laser evoked potential (LEP) distribution after either hand or foot skin stimulation. Methods: LEPs were recorded in 14 healthy subjects after hand and foot skin stimulation and brain electrical source analysis of responses obtained ineach individual was performed. Results: A 5 dipolar sources model explained the scalp LEP topography after both hand and foot stimulation. In particular, we showed that the co-ordinates of the two earliest activated dipoles were compatible with source locations in the upper bank of the Sylvian fissure on both sides. These sources did not change their location when the stimulation site was moved from the upper to the lower limb. The other 3 dipoles of our model were activated in the late LEP latency range with a biphasic profile and a location compatible with activation of the cingulate gyrus and deep temporo-insular structures. Conclusions: The dipolar model previously proposed for the hand stimulation LEPs can also satisfactorily explain the LEP distribution obtained after foot stimulation. The earliest activated Sylvian dipolar sources did not change their location when the upper or lower limb was stimulated, as expected from the close projections of hand and foot in the second somatosensory area. No source in the primary somatosensory area was necessary to model thescalp topography of LEPs to hand and foot stimulation. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.

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Documento generato il 03/04/20 alle ore 11:10:20