Visual attention to motion stimuli and its neural correlates in cannabis users

2018 ◽  
Vol 47 (3) ◽  
pp. 269-276
Author(s):  
Elena Mikulskaya ◽  
Frances Martin
Keyword(s):  
Visual Attention ◽  
Neural Correlates

scholarly journals Left-Hemispheric Asymmetry for Object-Based Attention: an ERP Study

2019 ◽  
Vol 9 (11) ◽  
pp. 315 ◽  
Author(s):  
Andrea Orlandi ◽  
Alice Mado Proverbio
Keyword(s):  
Visual Attention ◽  
Hemispheric Asymmetry ◽  
Time Course ◽  
Electrophysiological Study ◽  
Target Selection ◽  
Neural Correlates ◽  
Specific Stimulus ◽  
Object Categories ◽  
Object Based ◽  
Stimulus Features

It has been shown that selective attention enhances the activity in visual regions associated with stimulus processing. The left hemisphere seems to have a prominent role when non-spatial attention is directed towards specific stimulus features (e.g., color, spatial frequency). The present electrophysiological study investigated the time course and neural correlates of object-based attention, under the assumption of left-hemispheric asymmetry. Twenty-nine right-handed participants were presented with 3D graphic images representing the shapes of different object categories (wooden dummies, chairs, structures of cubes) which lacked detail. They were instructed to press a button in response to a target stimulus indicated at the beginning of each run. The perception of non-target stimuli elicited a larger anterior N2 component, which was likely associated with motor inhibition. Conversely, target selection resulted in an enhanced selection negativity (SN) response lateralized over the left occipito-temporal regions, followed by a larger centro-parietal P300 response. These potentials were interpreted as indexing attentional selection and categorization processes, respectively. The standardized weighted low-resolution electromagnetic tomography (swLORETA) source reconstruction showed the engagement of a fronto-temporo-limbic network underlying object-based visual attention. Overall, the SN scalp distribution and relative neural generators hinted at a left-hemispheric advantage for non-spatial object-based visual attention.

scholarly journals Dissociation between the neural correlates of conscious face perception and visual attention

2017 ◽  
Vol 54 (8) ◽  
pp. 1138-1150 ◽  
Author(s):  
Joaquin Navajas ◽  
Aleksander W. Nitka ◽  
Rodrigo Quian Quiroga
Keyword(s):  
Visual Attention ◽  
Face Perception ◽  
Neural Correlates

scholarly journals Understanding visual attention with RAGNAROC: A Reflexive Attention Gradient through Neural AttRactOr Competition

2018 ◽  
Author(s):  
Brad Wyble ◽  
Chloe Callahan-Flintoft ◽  
Hui Chen ◽  
Toma Marinov ◽  
Aakash Sarkar ◽  
...  
Keyword(s):  
Visual Attention ◽  
Relevant Information ◽  
Neural Correlates ◽  
Neural Mechanisms ◽  
Covert Attention ◽  
Lower Priority ◽  
Reflexive Attention ◽  
Visual Hierarchy ◽  
New Information ◽  
Suppression Effects

AbstractA quintessential challenge for any perceptual system is the need to focus on task-relevant information without being blindsided by unexpected, yet important information. The human visual system incorporates several solutions to this challenge, one of which is a reflexive covert attention system that is rapidly responsive to both the physical salience and the task-relevance of new information. This paper presents a model that simulates behavioral and neural correlates of reflexive attention as the product of brief neural attractor states that are formed across the visual hierarchy when attention is engaged. Such attractors emerge from an attentional gradient distributed over a population of topographically organized neurons and serve to focus processing at one or more locations in the visual field, while inhibiting the processing of lower priority information. The model moves towards a resolution of key debates about the nature of reflexive attention, such as whether it is parallel or serial, and whether suppression effects are distributed in a spatial surround, or selectively at the location of distractors. Most importantly, the model develops a framework for understanding the neural mechanisms of visual attention as a spatiotopic decision process within a hierarchy and links them to observable correlates such as accuracy, reaction time, and the N2pc and PD components of the EEG. This last contribution is the most crucial for repairing the disconnect that exists between our understanding of behavioral and neural correlates of attention.

scholarly journals Neural correlates of visual attention during risky decision evidence integration

NeuroImage ◽  
2021 ◽  
pp. 117979
Author(s):  
John R. Purcell ◽  
Andrew Jahn ◽  
Justin M. Fine ◽  
Joshua W. Brown
Keyword(s):  
Visual Attention ◽  
Neural Correlates ◽  
Risky Decision ◽  
Evidence Integration

Neural correlates of age-related decline and compensation in visual attention capacity

2014 ◽  
Vol 35 (9) ◽  
pp. 2161-2173 ◽  
Author(s):  
Iris Wiegand ◽  
Thomas Töllner ◽  
Mads Dyrholm ◽  
Hermann J. Müller ◽  
Claus Bundesen ◽  
...  
Keyword(s):  
Visual Attention ◽  
Neural Correlates ◽  
Age Related

scholarly journals Neural Correlates of Individual Differences in Infant Visual Attention and Recognition Memory

Infancy ◽  
2010 ◽  
Vol 16 (4) ◽  
pp. 368-391 ◽  
Author(s):  
Greg D. Reynolds ◽  
Maggie W. Guy ◽  
Dantong Zhang
Keyword(s):  
Individual Differences ◽  
Recognition Memory ◽  
Visual Attention ◽  
Neural Correlates

Neural correlates of visual attention in alcohol use disorder

2019 ◽  
Vol 194 ◽  
pp. 430-437 ◽  
Author(s):  
Amna Zehra ◽  
Elsa Lindgren ◽  
Corinde E. Wiers ◽  
Clara Freeman ◽  
Gregg Miller ◽  
...  
Keyword(s):  
Alcohol Use ◽  
Visual Attention ◽  
Alcohol Use Disorder ◽  
Neural Correlates

scholarly journals The neural correlates of voluntary visual attention to shape, color, and location

2011 ◽  
Vol 11 (11) ◽  
pp. 177-177
Author(s):  
S. M. Frank ◽  
E. A. Reavis ◽  
P. J. Kohler ◽  
A. L. Beer ◽  
P. U. Tse ◽  
...  
Keyword(s):  
Visual Attention ◽  
Neural Correlates
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