Evoked magnetic fields following noxious laser stimulation of the thigh in humans.
Identifieur interne : 000576 ( PubMed/Checkpoint ); précédent : 000575; suivant : 000577Evoked magnetic fields following noxious laser stimulation of the thigh in humans.
Auteurs : Hiroki Nakata [Japon] ; Yohei Tamura ; Kiwako Sakamoto ; Kosuke Akatsuka ; Masahiro Hirai ; Koji Inui ; Minoru Hoshiyama ; Youichi Saitoh ; Takamitsu Yamamoto ; Yoichi Katayama ; Ryusuke KakigiSource :
- NeuroImage [ 1095-9572 ] ; 2008.
Descripteurs français
- KwdFr :
- MESH :
- physiopathologie : Cortex somatosensoriel, Cuisse, Douleur.
- innervation : Adulte, Cuisse, Humains, Lasers, Magnétoencéphalographie, Mâle, Potentiels évoqués somatosensoriels, Stimulation physique.
English descriptors
- KwdEn :
- MESH :
- innervation : Thigh.
- methods : Magnetoencephalography, Physical Stimulation.
- physiopathology : Pain, Somatosensory Cortex, Thigh.
- Adult, Evoked Potentials, Somatosensory, Humans, Lasers, Male.
Abstract
Primary somatosensory cortex (SI) and posterior parietal cortex (PPC) are activated by noxious stimulation. In neurophysiological studies using magnetoencephalography (MEG), however, it has been difficult to separate the activity in SI from that in PPC following stimulation of the upper limb, since the hand area of SI is very close to PPC. Therefore, we investigated human pain processing using MEG following the application of a thulium-YAG laser to the left thigh to separate the activation of SI and PPC, and to clarify the time course of the activities involved. The results indicated that cortical activities were recorded around SI, contralateral secondary somatosensory cortex (cSII), ipsilateral secondary somatosensory cortex (iSII), and PPC between 150-185 ms. The precise location of PPC was indicated to be the inferior parietal lobule (IPL), corresponding to Brodmann's area 40. The mean peak latencies of SI, cSII, iSII and IPL were 152, 170, 181, and 183 ms, respectively. This is the first study to clarify the time course of the activities of SI, SII, and PPC in human pain processing using MEG.
DOI: 10.1016/j.neuroimage.2008.05.017
PubMed: 18585060
Affiliations:
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pubmed:18585060Le document en format XML
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<term>Lasers</term>
<term>Magnetoencephalography (methods)</term>
<term>Male</term>
<term>Pain (physiopathology)</term>
<term>Physical Stimulation (methods)</term>
<term>Somatosensory Cortex (physiopathology)</term>
<term>Thigh (innervation)</term>
<term>Thigh (physiopathology)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Adulte</term>
<term>Cortex somatosensoriel (physiopathologie)</term>
<term>Cuisse (innervation)</term>
<term>Cuisse (physiopathologie)</term>
<term>Douleur (physiopathologie)</term>
<term>Humains</term>
<term>Lasers</term>
<term>Magnétoencéphalographie ()</term>
<term>Mâle</term>
<term>Potentiels évoqués somatosensoriels</term>
<term>Stimulation physique ()</term>
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<term>Douleur</term>
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<front><div type="abstract" xml:lang="en">Primary somatosensory cortex (SI) and posterior parietal cortex (PPC) are activated by noxious stimulation. In neurophysiological studies using magnetoencephalography (MEG), however, it has been difficult to separate the activity in SI from that in PPC following stimulation of the upper limb, since the hand area of SI is very close to PPC. Therefore, we investigated human pain processing using MEG following the application of a thulium-YAG laser to the left thigh to separate the activation of SI and PPC, and to clarify the time course of the activities involved. The results indicated that cortical activities were recorded around SI, contralateral secondary somatosensory cortex (cSII), ipsilateral secondary somatosensory cortex (iSII), and PPC between 150-185 ms. The precise location of PPC was indicated to be the inferior parietal lobule (IPL), corresponding to Brodmann's area 40. The mean peak latencies of SI, cSII, iSII and IPL were 152, 170, 181, and 183 ms, respectively. This is the first study to clarify the time course of the activities of SI, SII, and PPC in human pain processing using MEG.</div>
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<Abstract><AbstractText>Primary somatosensory cortex (SI) and posterior parietal cortex (PPC) are activated by noxious stimulation. In neurophysiological studies using magnetoencephalography (MEG), however, it has been difficult to separate the activity in SI from that in PPC following stimulation of the upper limb, since the hand area of SI is very close to PPC. Therefore, we investigated human pain processing using MEG following the application of a thulium-YAG laser to the left thigh to separate the activation of SI and PPC, and to clarify the time course of the activities involved. The results indicated that cortical activities were recorded around SI, contralateral secondary somatosensory cortex (cSII), ipsilateral secondary somatosensory cortex (iSII), and PPC between 150-185 ms. The precise location of PPC was indicated to be the inferior parietal lobule (IPL), corresponding to Brodmann's area 40. The mean peak latencies of SI, cSII, iSII and IPL were 152, 170, 181, and 183 ms, respectively. This is the first study to clarify the time course of the activities of SI, SII, and PPC in human pain processing using MEG.</AbstractText>
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