Steinkamp, Simon R., Vossel, Simone, Fink, Gereon R. ORCID: 0000-0002-8230-1856 and Weidner, Ralph (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:
CreatorsEmailORCIDORCID Put Code
Steinkamp, Simon R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vossel, SimoneUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fink, Gereon R.UNSPECIFIEDorcid.org/0000-0002-8230-1856UNSPECIFIED
Weidner, RalphUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
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: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
VENTRAL ATTENTION; SPATIAL ATTENTION; PERMUTATION TESTS; PARIETAL CORTEX; NEGLECT; DORSAL; BRAIN; STIMULATION; NETWORK; SYSTEMSMultiple languages
Neurosciences; Neuroimaging; Radiology, Nuclear Medicine & Medical ImagingMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/33015

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