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Titolo:
Interhemispheric phase synchrony and amplitude correlation of spontaneous beta oscillations in human subjects: a magnetoencephalographic study
Autore:
Nikouline, VV; Linkenkaer-Hansen, K; Huttunen, J; Ilmoniemi, RJ;
Indirizzi:
Univ Helsinki, Cent Hosp, Med Engn Ctr, BioMag Lab, FIN-00029 HUS, FinlandUniv Helsinki HUS Finland FIN-00029 , BioMag Lab, FIN-00029 HUS, Finland Univ Helsinki, Cent Hosp, Dept Clin Neurophysiol, FIN-00029 HUS, Finland Univ Helsinki HUS Finland FIN-00029 Neurophysiol, FIN-00029 HUS, Finland
Titolo Testata:
NEUROREPORT
fascicolo: 11, volume: 12, anno: 2001,
pagine: 2487 - 2491
SICI:
0959-4965(20010808)12:11<2487:IPSAAC>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
CAT VISUAL-CORTEX; MOTOR CORTEX; FUNCTIONAL CONNECTIVITY; FINGER MOVEMENTS; THUMB MOVEMENT; BRAIN; COHERENCE; FIELDS; FLUCTUATIONS; ACTIVATION;
Keywords:
beta oscillations; correlation; long-range synchrony; MEG;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Nikouline, VV Univ Helsinki, Cent Hosp, Med Engn Ctr, BioMag Lab, POB 340,FIN-00029 HUS, Finland Univ Helsinki POB 340 HUS Finland FIN-00029 29 HUS, Finland
Citazione:
V.V. Nikouline et al., "Interhemispheric phase synchrony and amplitude correlation of spontaneous beta oscillations in human subjects: a magnetoencephalographic study", NEUROREPORT, 12(11), 2001, pp. 2487-2491

Abstract

Interhemispheric phase synchrony and amplitude correlation of beta oscillations were studied with MEG in a resting condition. The left and right hemisphere beta oscillations exhibited phase-locking with a phase-lag near zerodegrees. The index of synchronization was strongest when these oscillations had large amplitude. Functionally, we interpret the phase synchrony on the basis of bilaterality of movement organization. A positive interhemispheric correlation was also found for the amplitude of spontaneous beta oscillations over long time intervals (> 1 s). The low-frequency correlation of spontaneous rhythmic activity may be the source of the low-frequency correlations of the hemodynamic responses in homologous areas that have been reported previously and have been interpreted as functional connectivity between these areas. NeuroReport 12:2487-2491 (C) 2001 Lippincott Williams & Wilkins.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 15:00:22