Universität zu Köln

Steinkamp, Simon R., Vossel, Simone ORCID: 0000-0002-6351-8849, Fink, Gereon R. ORCID: 0000-0002-8230-1856 and Weidner, Ralph ORCID: 0000-0002-4502-0166 (2020). Attentional reorientation along the meridians of the visual field: Are there different neural mechanisms at play? Hum. Brain Mapp., 41 (13). S. 3765 - 3781. HOBOKEN: WILEY. ISSN 1097-0193

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Abstract

Hemispatial neglect, after unilateral lesions to parietal brain areas, is characterized by an inability to respond to unexpected stimuli in contralesional space. As the visual field's horizontal meridian is most severely affected, the brain networks controlling visuospatial processes might be tuned explicitly to this axis. We investigated such a potential directional tuning in the dorsal and ventral frontoparietal attention networks, with a particular focus on attentional reorientation. We used an orientation-discrimination task where a spatial precue indicated the target position with 80% validity. Healthy participants (n= 29) performed this task in two runs and were required to (re-)orient attention either only along the horizontal or the vertical meridian, while fMRI and behavioral measures were recorded. By using a general linear model for behavioral and fMRI data, dynamic causal modeling for effective connectivity, and other predictive approaches, we found strong statistical evidence for a reorientation effect for horizontal and vertical runs. However, neither neural nor behavioral measures differed between vertical and horizontal reorienting. Moreover, models from one run successfully predicted the cueing condition in the respective other run. Our results suggest that activations in the dorsal and ventral attention networks represent higher-order cognitive processes related to spatial attentional (re-)orientating that are independent of directional tuning and that unilateral attention deficits after brain damage are based on disrupted interactions between higher-level attention networks and sensory areas.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Steinkamp, Simon R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Vossel, Simone UNSPECIFIED orcid.org/0000-0002-6351-8849 UNSPECIFIED Fink, Gereon R. UNSPECIFIED orcid.org/0000-0002-8230-1856 UNSPECIFIED Weidner, Ralph UNSPECIFIED orcid.org/0000-0002-4502-0166 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-330156
DOI:	10.1002/hbm.25086
Journal or Publication Title:	Hum. Brain Mapp.
Volume:	41
Number:	13
Page Range:	S. 3765 - 3781
Date:	2020
Publisher:	WILEY
Place of Publication:	HOBOKEN
ISSN:	1097-0193
Language:	English
Faculty:	Faculty of Human Sciences
Divisions:	Faculty of Human Sciences > Department Psychologie
Subjects:	Psychology
Uncontrolled Keywords:	Keywords Language VENTRAL ATTENTION; SPATIAL ATTENTION; PERMUTATION TESTS; PARIETAL CORTEX; NEGLECT; DORSAL; BRAIN; STIMULATION; NETWORK; SYSTEMS Multiple languages Neurosciences; Neuroimaging; Radiology, Nuclear Medicine & Medical Imaging Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/33015