Interhemispheric phase synchrony and amplitude correlation of spontaneous beta 
oscillations in human subjects: A magnetoencephalographic study

Nikulin, Vadim V.; Linkenkaer-Hansen, Klaus; Huttunen, Juha; Ilmoniemi, Risto J.

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Interhemispheric phase synchrony and amplitude correlation of spontaneous beta oscillations in human subjects: A magnetoencephalographic study

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Nikulin, V. V., Linkenkaer-Hansen, K., Huttunen, J., & Ilmoniemi, R. J. (2001). Interhemispheric phase synchrony and amplitude correlation of spontaneous beta oscillations in human subjects: A magnetoencephalographic study. NeuroReport, 12(11), 2487-2491.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-4145-5

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 zero degrees. 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.