Universität zu Köln

Moos, Katharina, Vossel, Simone ORCID: 0000-0002-6351-8849, Weidner, Ralph ORCID: 0000-0002-4502-0166, Sparing, Roland and Fink, Gereon R. ORCID: 0000-0002-8230-1856 (2012). Modulation of Top-Down Control of Visual Attention by Cathodal tDCS over Right IPS. J. Neurosci., 32 (46). S. 16360 - 16369. WASHINGTON: SOC NEUROSCIENCE. ISSN 0270-6474

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Abstract

The right intraparietal sulcus (rIPS) is a key region for the endogenous control of selective visual attention in the human brain. Previous studies suggest that the rIPS is especially involved in top-down control and spatial distribution of attention across both visual hemifields. We further explored these attentional functions using transcranial direct current stimulation (tDCS) of the rIPS to modulate behavioral performance in a partial report task. Performance was analyzed according to the theory of visual attention (TVA) (Bundesen, 1990), which provides a computational framework to investigate different parameters of visuo-attentional processing such as top-down control, attentional weighting, capacity of visual short term memory, and processing speed. We investigated the effects of different tDCS current strengths (1 mA and 2 mA) in two experiments: 1 mA tDCS (anodal, cathodal, sham) did not affect any of the TVA parameters, but cathodal 2 mA stimulation significantly enhanced top-down control as evidenced by a reduction of the alpha parameter of TVA, regardless of hemifield. This differential impact on the top-down control component of attentional processing suggests that the horizontal rIPS is mainly involved in attentional selection as none of the spatial or resource variables of TVA were altered. Furthermore, the data add evidence to previous work highlighting (1) the importance of using appropriate current strength in stimulation protocols, and (2) that the often reported inhibitory effect of cathodal stimulation in e. g., motor tasks might not extend to cognitive paradigms.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Moos, Katharina UNSPECIFIED UNSPECIFIED UNSPECIFIED Vossel, Simone UNSPECIFIED orcid.org/0000-0002-6351-8849 UNSPECIFIED Weidner, Ralph UNSPECIFIED orcid.org/0000-0002-4502-0166 UNSPECIFIED Sparing, Roland UNSPECIFIED UNSPECIFIED UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-478956
DOI:	10.1523/JNEUROSCI.6233-11.2012
Journal or Publication Title:	J. Neurosci.
Volume:	32
Number:	46
Page Range:	S. 16360 - 16369
Date:	2012
Publisher:	SOC NEUROSCIENCE
Place of Publication:	WASHINGTON
ISSN:	0270-6474
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DIRECT-CURRENT STIMULATION; HUMAN MOTOR CORTEX; TRANSCRANIAL MAGNETIC STIMULATION; CONCURRENT TMS-FMRI; PARIETAL CORTEX; BRAIN; PLASTICITY; TVA; SELECTION; DEFICITS Multiple languages Neurosciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/47895