Universität zu Köln

Wang, Bin A., Viswanathan, Shivakumar ORCID: 0000-0002-7513-3778, Abdollahi, Rouhollah O., Rosjat, Nils, Popovych, Svitlana, Daun, Silvia ORCID: 0000-0001-7342-1015, Grefkes, Christian ORCID: 0000-0002-1656-720X and Fink, Gereon R. ORCID: 0000-0002-8230-1856 (2017). Frequency-specific modulation of connectivity in the ipsilateral sensorimotor cortex by different forms of movement initiation. Neuroimage, 159. S. 248 - 261. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1095-9572

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Abstract

A consistent finding in motor EEG research is a bilateral attenuation of oscillatory activity over sensorimotor regions close to the onset of an upcoming unilateral hand movement. In contrast, little is known about how movement initiation affects oscillatory activity, especially in the hemisphere ipsilateral to the moving hand. We here investigated the neural mechanisms modulating oscillatory activity in the ipsilateral motor cortex prior to movement onset under the control of two different initiating networks, namely, Self-initiated and Visually-cued actions. During motor preparation, a contralateral preponderance of power over sensorimotor cortex (SM) was observed in a and beta bands during Visually-cued movements, whereas power changes were more bilateral during Self-initiated movements. Coherence between ipsilateral SM (iSM) and contralateral SM (cSM) in the a-band was significantly increased compared to the respective baseline values, independent of the context of movement initiation. However, this context-independent cSM-iSM coherence modulated the power changes in iSM in a context-dependent manner, that is, a stronger cSM-iSM coherence correlated with a larger decrease in high-beta power over iSM in the Self-initiated condition, in contrast to a smaller decrease in a power in the Visually-cued condition. In addition, the context-dependent coherence between SMA and iSM in the alpha-band and delta-theta-band for the Self-initiated and Visually-cued condition, respectively, exhibited a similar context-dependent modulation for power changes. Our findings suggest that the initiation of regional oscillations over iSM reflects changes in the information flow with the contralateral sensorimotor and premotor areas dependent upon the context of movement initiation. Importantly, the interaction between regional oscillations and network-like oscillatory couplings indicates different frequency-specific inhibitory mechanisms that modulate the activity in the ipsilateral sensorimotor cortex dependent upon how the movement is initiated.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wang, Bin A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Viswanathan, Shivakumar UNSPECIFIED orcid.org/0000-0002-7513-3778 UNSPECIFIED Abdollahi, Rouhollah O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rosjat, Nils UNSPECIFIED UNSPECIFIED UNSPECIFIED Popovych, Svitlana UNSPECIFIED UNSPECIFIED UNSPECIFIED Daun, Silvia UNSPECIFIED orcid.org/0000-0001-7342-1015 UNSPECIFIED Grefkes, Christian UNSPECIFIED orcid.org/0000-0002-1656-720X UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-216922
DOI:	10.1016/j.neuroimage.2017.07.054
Journal or Publication Title:	Neuroimage
Volume:	159
Page Range:	S. 248 - 261
Date:	2017
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 SEQUENTIAL FINGER MOVEMENTS; BETA-BAND OSCILLATIONS; PRIMARY MOTOR CORTEX; PARKINSONS-DISEASE; INTERHEMISPHERIC INTERACTIONS; HAND MOVEMENTS; DIFFERENT COMPLEXITIES; ALPHA-BAND; EEG; STIMULATION Multiple languages Neurosciences; Neuroimaging; Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/21692