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Titolo:
Comparisons of event-related potentials after repetitive transcranial magnetic stimulation
Autore:
Jing, H; Takigawa, M; Okamura, H; Doi, W; Fukuzako, H;
Indirizzi:
Kagoshima Univ, Fac Med, Dept Neuropsychiat, Kagoshima 8908520, Japan Kagoshima Univ Kagoshima Japan 8908520 sychiat, Kagoshima 8908520, Japan
Titolo Testata:
JOURNAL OF NEUROLOGY
fascicolo: 3, volume: 248, anno: 2001,
pagine: 184 - 192
SICI:
0340-5354(200103)248:3<184:COEPAR>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED-POTENTIALS; PREFRONTAL CORTEX; MAJOR DEPRESSION; AUDITORY P300; FRONTAL LOBES; EEG COHERENCE; SAFETY; BRAIN; SCHIZOPHRENIA; LOCALIZATION;
Keywords:
cognition; coherence; brain; electroencephalography; magnetic stimulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
56
Recensione:
Indirizzi per estratti:
Indirizzo: Takigawa, M Kagoshima Univ, Fac Med, Dept Neuropsychiat, 8-35-1 Sakuragaoka, Kagoshima8908520, Japan Kagoshima Univ 8-35-1 Sakuragaoka Kagoshima Japan 8908520 pan
Citazione:
H. Jing et al., "Comparisons of event-related potentials after repetitive transcranial magnetic stimulation", J NEUROL, 248(3), 2001, pp. 184-192

Abstract

Effects of repetitive transcranial magnetic stimulation (rTMS) on the human cognitive process were investigated by examining auditory event-related potentials (ERPs) in 15 healthy subjects. Two rTMS trains were delivered over the left frontal area, with 30 pulses in each train. ERPs were recorded at 14 electrode sites on the scalp using a typical oddball protocol before and after rTMS. Tone stimuli (20% target and 80% standard) were delivered through earphones. Latency and amplitude of N-100, P-200, N-200 and P-300 were measured and compared during the study. To observe information flow between two electrode sites, directed coherence (DCOH) was calculated on the ERPs. Our results show that the effect of rTMS differs in the various ERPs components (P < 0.001). The latency of P-300 significantly increased after stimulation, and the increase was more obvious in the frontal (18.6 ms) and central (15.8 ms) areas. The latency of P-200 decreased in all areas. The amplitude of component N-100 in the frontal and central areas decreased after rTMS. DCOH from the central area to the temporal area and DCOH from the parietal area to the temporal area were significantly higher than the DCOH between other areas (P < 0.01), and these properties were not affected by rTMS(P > 0.05). Information flow was driven from the frontal area to the parietal area after stimulation. Our results suggest that rTMS can suppress cognitive activities, showing an inhibitory effect on neurophysiological processes in the human brain. Since the temporal area is located at the terminus of the propagation pathways, it plays important roles in processing information in cognitive activities.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 03:31:10