Hum Brain Mapp 2015 Dec 29;36(12):5233-51. Epub 2015 Sep 29.
Center for Brain and Cognitive Sciences and Department of Psychology, Peking University, Beijing, China.
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Hum Brain Mapp 2014 Jul 5;35(7):3036-51. Epub 2013 Dec 5.
Department of Psychiatry, Campus Charité Mitte, Charité - Universitätsmedizin Berlin, Berlin, Germany.
Although neural signals of reward anticipation have been studied extensively, the functional relationship between reward and attention has remained unclear: Neural signals implicated in reward processing could either reflect attentional biases towards motivationally salient stimuli, or proceed independently of attentional processes. Here, we sought to disentangle reward and attention-related neural processes by independently modulating reward value and attentional task demands in a functional magnetic resonance imaging study in healthy human participants. During presentation of a visual reward cue that indicated whether monetary reward could be obtained in a subsequent reaction time task, participants either attended to the reward cue or performed an unrelated attention-demanding task at two different levels of difficulty. Read More
J Neurosci 2011 Dec;31(49):18026-35
Center for Mind and Brain, University of California Davis, Davis, California 95616, USA.
Contextual cues are predictive and provide behaviorally relevant information; they are not the main objective of the current task but can make behavior more efficient. Using fMRI, we investigated the brain networks involved in representing contextual information and translating it into an attentional control signal. Human subjects performed a visual search task for a low-contrast target accompanied by a single non-target that was either perceptually similar or more salient (i. Read More
J Vis 2014 Oct 3;14(12). Epub 2014 Oct 3.
Center for Brain and Cognitive Sciences and Department of Psychology, Peking University, Beijing, China Key Laboratory of Machine Perception (Ministry of Education), Peking University, Beijing, China PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, China.
It is well known that directing attention to a location in space enhances the processing efficiency of stimuli presented at that location. Research has also shown that around this area of enhanced processing, there is an inhibitory region within which processing of information is suppressed. In this study, we investigated whether a reward-associated stimulus can break through the inhibitory surround. Read More
Neuroimage 2016 Apr 28;129:148-158. Epub 2016 Jan 28.
Cognitive Neuroscience, Institute of Neuroscience & Medicine (INM-3), Research Centre Juelich, 52425 Juelich, Germany; Department of Neurology, University Hospital Cologne, 50937 Cologne, Germany.
Modelling psychophysical data using the Theory of Visual Attention (TVA) allows for a quantification of attentional sub-processes, such as the resolution of competition amongst multiple stimuli by top-down control signals for target selection (TVA-parameter α). This fMRI study investigated the neural correlates of α by comparing activity differences and changes of effective connectivity between conditions where a target was accompanied by a distractor or by a second target. Twenty-five participants performed a partial report task inside the MRI scanner. Read More