User profiles for Ralph Weidner

Ralph Weidner

Forschungszentrum Jülich
Verified email at fz-juelich.de
Cited by 2256

Visual size processing in early visual cortex follows lateral occipital cortex involvement

H Zeng, GR Fink, R Weidner - Journal of Neuroscience, 2020 - Soc Neuroscience
Neural activation in the early visual cortex (EVC) reflects the perceived rather than retinal
size of stimuli, suggesting that feedback possibly from extrastriate regions modulates retinal …

Deconstructing the architecture of dorsal and ventral attention systems with dynamic causal modeling

S Vossel, R Weidner, J Driver, KJ Friston… - Journal of …, 2012 - Soc Neuroscience
Attentional orientation to a spatial cue and reorientation—after invalid cueing—are mediated
by two distinct networks in the human brain. A bilateral dorsal frontoparietal network, …

The neural mechanisms underlying the Müller-Lyer illusion and its interaction with visuospatial judgments

R Weidner, GR Fink - Cerebral Cortex, 2007 - academic.oup.com
Arrows terminating a line can distort the perceived line length. This so-called Müller-Lyer
illusion can be used in healthy human subjects to mimic the performance of neglect patients in …

Neural mechanisms of attentional reorienting in three-dimensional space

Q Chen, R Weidner, S Vossel, PH Weiss… - Journal of …, 2012 - Soc Neuroscience
How the human brain reconstructs the three-dimensional (3D) world from two-dimensional (2D)
retinal images has received a great deal of interest as has how we shift attention in 2D …

Neural correlates of visual dimension weighting

S Pollmann, R Weidner, HJ Müller… - Visual …, 2006 - Taylor & Francis
In a series of functional magnetic resonance experiments, we have investigated the neural
basis of attentional dimension weighting in crossdimensional singleton search. Previous …

Modulation of top-down control of visual attention by cathodal tDCS over right IPS

K Moos, S Vossel, R Weidner, R Sparing… - Journal of …, 2012 - Soc Neuroscience
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 …

Separating distractor rejection and target detection in posterior parietal cortex—an event-related fMRI study of visual marking

S Pollmann, R Weidner, GW Humphreys, CNL Olivers… - Neuroimage, 2003 - Elsevier
Successful survival in a competitive world requires the employment of efficient procedures for
selecting new in preference to old information. Recent behavioral studies have shown that …

What is “odd” in Posner's location-cueing paradigm? Neural responses to unexpected location and feature changes compared

S Vossel, R Weidner, CM Thiel, GR Fink - Journal of cognitive …, 2009 - direct.mit.edu
Within the parietal cortex, the temporo-parietal junction (TPJ) and the intraparietal sulcus (IPS)
seem to be involved in both spatial and nonspatial functions: Both areas are activated …

Differential roles of inferior frontal and inferior parietal cortex in task switching: Evidence from stimulus‐categorization switching and response‐modality switching

AM Philipp, R Weidner, I Koch… - Human brain mapping, 2013 - Wiley Online Library
We used fMRI to investigate both common and differential neural mechanisms underlying
two distinct types of switching requirements, namely switching between stimulus …

Statistical learning of frequent distractor locations in visual search involves regional signal suppression in early visual cortex

B Zhang, R Weidner, F Allenmark, S Bertleff… - Cerebral …, 2022 - academic.oup.com
Observers can learn locations where salient distractors appear frequently to reduce potential
interference—an effect attributed to better suppression of distractors at frequent locations. …