Top-down attention alters background connectivity between retinotopic and category-specific visual areas
نویسندگان
چکیده
منابع مشابه
Depression alters "top-down" visual attention: A dynamic causal modeling comparison between depressed and healthy subjects
Using functional magnetic resonance imaging (fMRI), we recently demonstrated that nonmedicated patients with a first episode of unipolar major depression (MDD) compared to matched controls exhibited an abnormal neural filtering of irrelevant visual information (Desseilles et al., 2009). During scanning, subjects performed a visual attention task imposing two different levels of attentional load...
متن کاملTop-down attention switches coupling between low-level and high-level areas of human visual cortex.
Top-down attention is an essential cognitive ability, allowing our finite brains to process complex natural environments by prioritizing information relevant to our goals. Previous evidence suggests that top-down attention operates by modulating stimulus-evoked neural activity within visual areas specialized for processing goal-relevant information. We show that top-down attention also has a se...
متن کاملTop-down control of visual attention.
Top-down visual attention improves perception of selected stimuli and that improvement is reflected in the neural activity at many stages throughout the visual system. Recent studies of top-down attention have elaborated on the signatures of its effects within visual cortex and have begun identifying its causal basis. Evidence from these studies suggests that the correlates of spatial attention...
متن کاملVisual Attention: Bottom-Up Versus Top-Down
Visual attention is attracted by salient stimuli that 'pop out' from their surroundings. Attention can also be voluntarily directed to objects of current importance to the observer. What happens in the brain when these two processes interact?
متن کاملTop-down Attention Supports Visual Loop Closing
In this paper, we present a method to improve the loop closing behaviour for visual SLAM. Landmarks consist of a combination of attention regions and Harris-Laplace corners. The attention regions are detected by a visual attention system which combines image-based, bottom-up and target-related, topdown information. The ability to perform target-directed search is used to search for expected lan...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Vision
سال: 2011
ISSN: 1534-7362
DOI: 10.1167/11.11.174