Decoding covert visual attention based on phase transfer entropy

2020 ◽  
Vol 222 ◽  
pp. 112932 ◽  
Author(s):  
Amirmasoud Ahmadi ◽  
Saeideh Davoudi ◽  
Mahsa Behroozi ◽  
Mohammad Reza Daliri
Keyword(s):  
Visual Attention ◽  
Phase Transfer ◽  
Transfer Entropy ◽  
Covert Visual Attention

scholarly journals Sign language experience redistributes attentional resources to the inferior visual field

2019 ◽  
Author(s):  
Chloé Stoll ◽  
Matthew William Geoffrey Dye
Keyword(s):  
Visual Field ◽  
Visual Attention ◽  
Visual System ◽  
Visual Fields ◽  
The Body ◽  
Language Experience ◽  
Bayesian Hierarchical ◽  
Signed Languages ◽  
Covert Visual Attention ◽  
Deaf Signers

While a substantial body of work has suggested that deafness brings about an increased allocation of visual attention to the periphery there has been much less work on how using a signed language may also influence this attentional allocation. Signed languages are visual-gestural and produced using the body and perceived via the human visual system. Signers fixate upon the face of interlocutors and do not directly look at the hands moving in the inferior visual field. It is therefore reasonable to predict that signed languages require a redistribution of covert visual attention to the inferior visual field. Here we report a prospective and statistically powered assessment of the spatial distribution of attention to inferior and superior visual fields in signers – both deaf and hearing – in a visual search task. Using a Bayesian Hierarchical Drift Diffusion Model, we estimated decision making parameters for the superior and inferior visual field in deaf signers, hearing signers and hearing non-signers. Results indicated a greater attentional redistribution toward the inferior visual field in adult signers (both deaf and hearing) than in hearing sign-naïve adults. The effect was smaller for hearing signers than for deaf signers, suggestive of either a role for extent of exposure or greater plasticity of the visual system in the deaf. The data provide support for a process by which the demands of linguistic processing can influence the human attentional system.

scholarly journals Neuronal modulation in the mouse superior colliculus during covert visual selective attention

2021 ◽  
Author(s):  
Lupeng Wang ◽  
James P. Herman ◽  
Richard J. Krauzlis
Keyword(s):  
Visual Attention ◽  
Selective Attention ◽  
Superior Colliculus ◽  
Firing Rate ◽  
Spatial Location ◽  
Relevant Information ◽  
Brain Regions ◽  
Uncued Location ◽  
Visual Selective Attention ◽  
Covert Visual Attention

AbstractCovert visual attention is accomplished by a cascade of mechanisms distributed across multiple brain regions. Recent studies in primates suggest a parcellation in which visual cortex is associated with enhanced representations of relevant stimuli, whereas subcortical circuits are associated with selection of visual targets and suppression of distractors. Here we identified how neuronal activity in the superior colliculus (SC) of head-fixed mice is modulated during covert visual attention. We found that spatial cues modulated both firing rate and spike-count correlations, and that the cue-related modulation in firing rate was due to enhancement of activity at the cued spatial location rather than suppression at the uncued location. This modulation improved the neuronal discriminability of visual-change-evoked activity between contralateral and ipsilateral SC neurons. Together, our findings indicate that neurons in the mouse SC contribute to covert visual selective attention by biasing processing in favor of locations expected to contain relevant information.

Visual attention in cirrhotic patients: A study on covert visual attention orienting

Hepatology ◽  
1998 ◽  
Vol 27 (6) ◽  
pp. 1517-1523 ◽  
Author(s):  
Piero Amodio ◽  
Piergiorgio Marchetti ◽  
Franco Del Piccolo ◽  
Giovanni Campo ◽  
Cristiano Rizzo ◽  
...  
Keyword(s):  
Visual Attention ◽  
Attention Orienting ◽  
Covert Visual Attention ◽  
Cirrhotic Patients

scholarly journals Covert Visual Attention Modulates Face-Specific Activity in the Human Fusiform Gyrus: fMRI Study

1998 ◽  
Vol 79 (3) ◽  
pp. 1574-1578 ◽  
Author(s):  
Ewa Wojciulik ◽  
Nancy Kanwisher ◽  
Jon Driver
Keyword(s):  
Visual Attention ◽  
Specific Activity ◽  
Region Of Interest ◽  
Fusiform Gyrus ◽  
Covert Attention ◽  
Matching Task ◽  
Voluntary Attention ◽  
Retinal Stimulation ◽  
Covert Visual Attention ◽  
Fmri Study

Wojciulik, Ewa, Nancy Kanwisher, and Jon Driver. Covert visual attention modulates face-specific activity in the human fusiform gyrus: an fMRI study. J. Neurophysiol. 79: 1574–1578, 1998. Several lines of evidence demonstrate that faces undergo specialized processing within the primate visual system. It has been claimed that dedicated modules for such biologically significant stimuli operate in a mandatory fashion whenever their triggering input is presented. However, the possible role of covert attention to the activating stimulus has never been examined for such cases. We used functional magnetic resonance imaging to test whether face-specific activity in the human fusiform face area (FFA) is modulated by covert attention. The FFA was first identified individually in each subject as the ventral occipitotemporal region that responded more strongly to visually presented faces than to other visual objects under passive central viewing. This then served as the region of interest within which attentional modulation was tested independently, using active tasks and a very different stimulus set. Subjects viewed brief displays each comprising two peripheral faces and two peripheral houses (all presented simultaneously). They performed a matching task on either the two faces or the two houses, while maintaining central fixation to equate retinal stimulation across tasks. Signal intensity was reliably stronger during face-matching than house matching in both right- and left-hemisphere predefined FFAs. These results show that face-specific fusiform activity is reduced when stimuli appear outside (vs. inside) the focus of attention. Despite the modular nature of the FFA (i.e., its functional specificity and anatomic localization), face processing in this region nonetheless depends on voluntary attention.

scholarly journals The Pupillary Light Response Reveals the Focus of Covert Visual Attention

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e78168 ◽  
Author(s):  
Sebastiaan Mathôt ◽  
Lotje van der Linden ◽  
Jonathan Grainger ◽  
Françoise Vitu
Keyword(s):  
Visual Attention ◽  
Light Response ◽  
Pupillary Light ◽  
Covert Visual Attention

Covert visual attention in schizophrenia spectrum personality disordered subjects: Visuospatial cuing and alerting effects

1996 ◽  
Vol 30 (4) ◽  
pp. 261-275 ◽  
Author(s):  
Marianne J. Moran ◽  
Gunvant K. Thaker ◽  
David J. Laporte ◽  
Shawn L. Cassady ◽  
David E. Ross
Keyword(s):  
Visual Attention ◽  
Covert Visual Attention ◽  
Schizophrenia Spectrum ◽  
Personality Disordered

ERP and topographical mapping indices of covert visual attention: The posner prepset paradigm

1993 ◽  
Vol 14 (2) ◽  
pp. 139
Author(s):  
H. Nordby ◽  
K. Hugdahl ◽  
D. Hammerborg ◽  
A. Vaksdal ◽  
K.M. Stormark
Keyword(s):  
Visual Attention ◽  
Covert Visual Attention ◽  
Topographical Mapping
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