Dorsal and ventral cortices are coupled by cross-frequency interactions during working memory

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Dorsal and ventral cortices are coupled by cross-frequency interactions during working memory. / Popov, Tzvetan; Jensen, Ole; Schoffelen, Jan-Mathijs.

In: NeuroImage, 01.09.2018, p. 277-286.

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@article{ba81e875ae2c4a159ca368147580c550,
title = "Dorsal and ventral cortices are coupled by cross-frequency interactions during working memory",
abstract = "Oscillatory activity in the alpha and gamma bands is considered key in shaping functional brain architecture. Power increases in the high-frequency gamma band are typically reported in parallel to decreases in the low-frequency alpha band. However, their functional significance and in particular their interactions are not well understood. The present study shows that, in the context of an N-back working memory task, alpha power decreases in the dorsal visual stream are related to gamma power increases in early visual areas. Granger causality analysis revealed directed interregional interactions from dorsal to ventral stream areas, in accordance with task demands. Present results reveal a robust, behaviorally relevant, and architectonically decisive power-to-power relationship between alpha and gamma activity. This relationship suggests that anatomically distant power fluctuations in oscillatory activity can link cerebral network dynamics on trial-by-trial basis during cognitive operations such as working memory.",
keywords = "N-back task, Working memory, Alpha oscillations, Gamma oscillations, Magnetoencephalography",
author = "Tzvetan Popov and Ole Jensen and Jan-Mathijs Schoffelen",
year = "2018",
month = sep,
day = "1",
doi = "10.1016/j.neuroimage.2018.05.054",
language = "English",
pages = "277--286",
journal = "NeuroImage",
issn = "1053-8119",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Dorsal and ventral cortices are coupled by cross-frequency interactions during working memory

AU - Popov, Tzvetan

AU - Jensen, Ole

AU - Schoffelen, Jan-Mathijs

PY - 2018/9/1

Y1 - 2018/9/1

N2 - Oscillatory activity in the alpha and gamma bands is considered key in shaping functional brain architecture. Power increases in the high-frequency gamma band are typically reported in parallel to decreases in the low-frequency alpha band. However, their functional significance and in particular their interactions are not well understood. The present study shows that, in the context of an N-back working memory task, alpha power decreases in the dorsal visual stream are related to gamma power increases in early visual areas. Granger causality analysis revealed directed interregional interactions from dorsal to ventral stream areas, in accordance with task demands. Present results reveal a robust, behaviorally relevant, and architectonically decisive power-to-power relationship between alpha and gamma activity. This relationship suggests that anatomically distant power fluctuations in oscillatory activity can link cerebral network dynamics on trial-by-trial basis during cognitive operations such as working memory.

AB - Oscillatory activity in the alpha and gamma bands is considered key in shaping functional brain architecture. Power increases in the high-frequency gamma band are typically reported in parallel to decreases in the low-frequency alpha band. However, their functional significance and in particular their interactions are not well understood. The present study shows that, in the context of an N-back working memory task, alpha power decreases in the dorsal visual stream are related to gamma power increases in early visual areas. Granger causality analysis revealed directed interregional interactions from dorsal to ventral stream areas, in accordance with task demands. Present results reveal a robust, behaviorally relevant, and architectonically decisive power-to-power relationship between alpha and gamma activity. This relationship suggests that anatomically distant power fluctuations in oscillatory activity can link cerebral network dynamics on trial-by-trial basis during cognitive operations such as working memory.

KW - N-back task

KW - Working memory

KW - Alpha oscillations

KW - Gamma oscillations

KW - Magnetoencephalography

U2 - 10.1016/j.neuroimage.2018.05.054

DO - 10.1016/j.neuroimage.2018.05.054

M3 - Article

SP - 277

EP - 286

JO - NeuroImage

JF - NeuroImage

SN - 1053-8119

ER -