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Titolo:
MAGNETOENCEPHALOGRAPHIC STUDY OF INTRACEREBRAL INTERACTIONS CAUSED BYBILATERAL POSTERIOR TIBIAL NERVE-STIMULATION IN MAN
Autore:
SHIMOJO M; KAKIGI R; HOSHIYAMA M; KOYAMA S; WATANABE S;
Indirizzi:
NATL INST PHYSIOL SCI,DEPT INTEGRAT PHYSIOL OKAZAKI AICHI 444 JAPAN NATL INST PHYSIOL SCI,DEPT INTEGRAT PHYSIOL OKAZAKI AICHI 444 JAPAN
Titolo Testata:
Neuroscience research
fascicolo: 1, volume: 28, anno: 1997,
pagine: 41 - 47
SICI:
0168-0102(1997)28:1<41:MSOIIC>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED MAGNETIC-FIELDS; PARADOXICAL LATERALIZATION; SOMATOSENSORY CORTEX; SHORT-LATENCY; MEDIAN NERVE; POTENTIALS; HUMANS; SCALP;
Keywords:
SOMATOSENSORY EVOKED RESPONSE; MAGNETOENCEPHALOGRAPHY; POSTERIOR TIBIAL NERVE; BILATERAL STIMULATION; INTERFERENCE; GATING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
M. Shimojo et al., "MAGNETOENCEPHALOGRAPHIC STUDY OF INTRACEREBRAL INTERACTIONS CAUSED BYBILATERAL POSTERIOR TIBIAL NERVE-STIMULATION IN MAN", Neuroscience research, 28(1), 1997, pp. 41-47

Abstract

We studied somatosensory evoked magnetic fields (SEFs) following stimulation of bilateral posterior tibial nerves ('bilateral' waveform) innormal subjects to determine the inter- and intra-hemispheric interference effects caused by activation of sensory areas in bilateral hemispheres. Activated areas in the primary and second sensory cortices (SIand SII) in each hemisphere following bilateral stimulation were clearly identified by estimation of the double best-fitted equivalent current dipoles (ECD) using the spherical head model, and the large inter-individual differences were identified. SEFs following the right posterior tibial nerve stimulation and those following the left stimulationwere summated ('summated' waveform). The 'difference' waveform was induced by a subtraction of 'bilateral' waveforms from the 'summated' waveform. Short-latency deflections showed no consistent changes betweenthe 'summated' and 'bilateral' waveforms, but the long-latency deflection, the N100m-P100m, in the 'bilateral' waveform was significantly (P < 0.02) reduced in amplitude as compared with the 'summated' waveform. The differences were clearly identified in the 'difference' waveform, in which the main deflections, U100m-D100m, were found. The ECDs ofthe short-latency deflections were located in SI contralateral to thestimulated nerve, but the ECDs of the N100m-P100m were located in bilateral SII which are considered to receive ascending signals from the body bilaterally. Therefore, some inhibitory interactions might take place in SII by receiving inputs from the body bilaterally. (C) 1997 Elsevier Science Ireland Ltd.

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Documento generato il 19/01/20 alle ore 20:12:26