Universität zu Köln

Popovych, S., Rosjat, N., Toth, T. I., Wang, B. A., Liu, L., Abdollahi, R. O., Viswanathan, S., Grefkes, C., Fink, G. R. and Daun, S. (2016). Movement-related phase locking in the delta-theta frequency band. Neuroimage, 139. S. 439 - 450. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1095-9572

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Abstract

Movements result from a complex interplay of multiple brain regions. These regions are assembled into distinct functional networks depending on the specific properties of the action. However, the nature and details of the dynamics of this complex assembly process are unknown. In this study, we sought to identify key markers of the neural processes underlying the preparation and execution of motor actions that always occur irrespective of differences in movement initiation, hence the specific neural processes and functional networks involved. To this end, EEG activity was continuously recorded from 18 right-handed healthy participants while they performed a simple motor task consisting of button presses with the left or right index finger. The movement was performed either in response to a visual cue or at a self-chosen, i.e., non-cued point in time. Despite these substantial differences in movement initiation, dynamic properties of the EEG signals common to both conditions could be identified using time-frequency and phase locking analysis of the EEG data. In both conditions, a significant phase locking effect was observed that started prior to the movement onset in the delta-theta frequency band (2-7 Hz), and that was strongest at the electrodes nearest to the contralateral motor region (M1). This phase locking effect did not have a counterpart in the corresponding power spectra (i.e., amplitudes), or in the event-related potentials. Our finding suggests that phase locking in the delta-theta frequency band is a ubiquitous movement-related signal independent of how the actual movement has been initiated. We therefore suggest that phase-locked neural oscillations in the motor cortex are a prerequisite for the preparation and execution of motor actions. (C) 2016 Elsevier Inc. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Popovych, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rosjat, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Toth, T. I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, B. A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Liu, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Abdollahi, R. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Viswanathan, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Grefkes, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, G. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Daun, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-261753
DOI:	10.1016/j.neuroimage.2016.06.052
Journal or Publication Title:	Neuroimage
Volume:	139
Page Range:	S. 439 - 450
Date:	2016
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1095-9572
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MONKEY MOTOR CORTEX; ACTIVATION; TASK; OSCILLATIONS; MODULATION; SYNCHRONIZATION; MECHANISMS; ARTIFACTS; DYNAMICS Multiple languages Neurosciences; Neuroimaging; Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26175