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Titolo:
Primary somatosensory cortex is actively involved in pain processing in human
Autore:
Kanda, M; Nagamine, T; Ikeda, A; Ohara, S; Kunieda, T; Fujiwara, N; Yazawa, S; Sawamoto, N; Matsumoto, R; Taki, W; Shibasaki, H;
Indirizzi:
Kyoto Univ, Grad Sch Med, Dept Brain Pathophysiol, Sakyo Ku, Kyoto 6068507, Japan Kyoto Univ Kyoto Japan 6068507 hophysiol, Sakyo Ku, Kyoto 6068507, Japan Takeda Gen Hosp, Dept Neurol, Kyoto 6011495, Japan Takeda Gen Hosp KyotoJapan 6011495 p, Dept Neurol, Kyoto 6011495, Japan Kyoto Univ, Grad Sch Med, Dept Neurosurg, Sakyo Ku, Kyoto 6068507, Japan Kyoto Univ Kyoto Japan 6068507 Neurosurg, Sakyo Ku, Kyoto 6068507, Japan Mie Univ, Sch Med, Dept Neurosurg, Tsu, Mie 5148507, Japan Mie Univ Tsu Mie Japan 5148507 d, Dept Neurosurg, Tsu, Mie 5148507, Japan Kyoto Univ, Grad Sch Med, Dept Neurol, Sakyo Ku, Kyoto 6068507, Japan Kyoto Univ Kyoto Japan 6068507 pt Neurol, Sakyo Ku, Kyoto 6068507, Japan
Titolo Testata:
BRAIN RESEARCH
fascicolo: 2, volume: 853, anno: 2000,
pagine: 282 - 289
SICI:
0006-8993(20000124)853:2<282:PSCIAI>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON-EMISSION-TOMOGRAPHY; NOXIOUS THERMAL-STIMULATION; EVOKED MAGNETIC-FIELDS; CO2-LASER STIMULATION; HUMAN BRAIN; CEREBRAL POTENTIALS; CO2 STIMULATION; CUTANEOUS HEAT; NASAL-MUCOSA; RESPONSES;
Keywords:
pain perception; magnetoencephalogram; primary somatosensory cortex (SI); subdural recording; parallel processing; human;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
48
Recensione:
Indirizzi per estratti:
Indirizzo: Shibasaki, H Kyoto Univ, Grad Sch Med, Dept Brain Pathophysiol, Sakyo Ku, 54 Kawahara Cho, Kyoto 6068507, Japan Kyoto Univ 54 Kawahara Cho Kyoto Japan 6068507 068507, Japan
Citazione:
M. Kanda et al., "Primary somatosensory cortex is actively involved in pain processing in human", BRAIN RES, 853(2), 2000, pp. 282-289

Abstract

We recorded somatosensory evoked magnetic fields (SEFs) by a whole head magnetometer to elucidate cortical receptive areas involved in pain processing, focusing on the primary somatosensory cortex (SI), following painful CO2laser stimulation of the dorsum of the left hand in 12 healthy human subjects. In seven subjects, three spatially segregated cortical areas (contralateral SI and bilateral second (SII) somatosensory cortices) were simultaneously activated at around 210 ms after the stimulus, suggesting parallel processing of pain information in SI and SII. Equivalent current dipole (ECD) in SI pointed anteriorly in three subjects whereas posteriorly in the remaining four. We also recorded SEFs following electric stimulation of the leftmedian nerve at wrist in three subjects. ECD of CO, laser stimulation was located medial-superior to that of electric stimulation in all three subjects. In addition, by direct recording of somatosensory evoked potentials (SEPs) from peri-Rolandic cortex by subdural electrodes in an epilepsy patient, we identified a response to the laser stimulation over the contralateral SI with the peak latency of 220 ms. Its distribution was similar to, but slightly wider than, that of P25 of electric SEPs. Taken together, it is postulated that the pain impulse is received in the crown of the postcentral gyrus in human. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 25/02/20 alle ore 08:07:11