Global Neuromagnetic Cortical Fields Have Non-Zero Velocity

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Standard

Global Neuromagnetic Cortical Fields Have Non-Zero Velocity. / Alexander, David M; Nikolaev, Andrey R; Jurica, Peter; Zvyagintsev, Mikhail; Mathiak, Klaus; van Leeuwen, Cees.

I: PLoS ONE, Vol. 11, Nr. 3, 2016, s. e0148413.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Harvard

Alexander, DM, Nikolaev, AR, Jurica, P, Zvyagintsev, M, Mathiak, K & van Leeuwen, C 2016, 'Global Neuromagnetic Cortical Fields Have Non-Zero Velocity', PLoS ONE, vol. 11, nr. 3, s. e0148413. https://doi.org/10.1371/journal.pone.0148413

APA

Alexander, D. M., Nikolaev, A. R., Jurica, P., Zvyagintsev, M., Mathiak, K., & van Leeuwen, C. (2016). Global Neuromagnetic Cortical Fields Have Non-Zero Velocity. PLoS ONE, 11(3), e0148413. https://doi.org/10.1371/journal.pone.0148413

CBE

Alexander DM, Nikolaev AR, Jurica P, Zvyagintsev M, Mathiak K, van Leeuwen C. 2016. Global Neuromagnetic Cortical Fields Have Non-Zero Velocity. PLoS ONE. 11(3):e0148413. https://doi.org/10.1371/journal.pone.0148413

MLA

Vancouver

Alexander DM, Nikolaev AR, Jurica P, Zvyagintsev M, Mathiak K, van Leeuwen C. Global Neuromagnetic Cortical Fields Have Non-Zero Velocity. PLoS ONE. 2016;11(3):e0148413. https://doi.org/10.1371/journal.pone.0148413

Author

Alexander, David M ; Nikolaev, Andrey R ; Jurica, Peter ; Zvyagintsev, Mikhail ; Mathiak, Klaus ; van Leeuwen, Cees. / Global Neuromagnetic Cortical Fields Have Non-Zero Velocity. I: PLoS ONE. 2016 ; Vol. 11, Nr. 3. s. e0148413.

RIS

TY - JOUR

T1 - Global Neuromagnetic Cortical Fields Have Non-Zero Velocity

AU - Alexander, David M

AU - Nikolaev, Andrey R

AU - Jurica, Peter

AU - Zvyagintsev, Mikhail

AU - Mathiak, Klaus

AU - van Leeuwen, Cees

PY - 2016

Y1 - 2016

N2 - Globally coherent patterns of phase can be obscured by analysis techniques that aggregate brain activity measures across-trials, whether prior to source localization or for estimating inter-areal coherence. We analyzed, at single-trial level, whole head MEG recorded during an observer-triggered apparent motion task. Episodes of globally coherent activity occurred in the delta, theta, alpha and beta bands of the signal in the form of large-scale waves, which propagated with a variety of velocities. Their mean speed at each frequency band was proportional to temporal frequency, giving a range of 0.06 to 4.0 m/s, from delta to beta. The wave peaks moved over the entire measurement array, during both ongoing activity and task-relevant intervals; direction of motion was more predictable during the latter. A large proportion of the cortical signal, measurable at the scalp, exists as large-scale coherent motion. We argue that the distribution of observable phase velocities in MEG is dominated by spatial filtering considerations in combination with group velocity of cortical activity. Traveling waves may index processes involved in global coordination of cortical activity.

AB - Globally coherent patterns of phase can be obscured by analysis techniques that aggregate brain activity measures across-trials, whether prior to source localization or for estimating inter-areal coherence. We analyzed, at single-trial level, whole head MEG recorded during an observer-triggered apparent motion task. Episodes of globally coherent activity occurred in the delta, theta, alpha and beta bands of the signal in the form of large-scale waves, which propagated with a variety of velocities. Their mean speed at each frequency band was proportional to temporal frequency, giving a range of 0.06 to 4.0 m/s, from delta to beta. The wave peaks moved over the entire measurement array, during both ongoing activity and task-relevant intervals; direction of motion was more predictable during the latter. A large proportion of the cortical signal, measurable at the scalp, exists as large-scale coherent motion. We argue that the distribution of observable phase velocities in MEG is dominated by spatial filtering considerations in combination with group velocity of cortical activity. Traveling waves may index processes involved in global coordination of cortical activity.

KW - Adult

KW - Cerebral Cortex/physiology

KW - Cluster Analysis

KW - Female

KW - Humans

KW - Magnetic Fields

KW - Male

KW - Models, Neurological

KW - Time Factors

KW - Young Adult

U2 - 10.1371/journal.pone.0148413

DO - 10.1371/journal.pone.0148413

M3 - Article

C2 - 26953886

VL - 11

SP - e0148413

JO - PLoS ONE

JF - PLoS ONE

SN - 1932-6203

IS - 3

ER -