scholarly journals Oculomotor capture reveals trial-by-trial neural correlates of attentional guidance by contents of visual working memory

Cortex ◽  
2020 ◽  
Vol 122 ◽  
pp. 159-169 ◽  
Author(s):  
Valerie M. Beck ◽  
Timothy J. Vickery
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Correlates ◽  
Oculomotor Capture ◽  
Attentional Guidance

scholarly journals Multiple states in visual working memory: Evidence from oculomotor capture by memory-matching distractors

2018 ◽  
Author(s):  
Valerie Beck ◽  
Timothy Vickery
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Response Times ◽  
Task Demands ◽  
Continuous Variables ◽  
Oculomotor Capture ◽  
Attentional Guidance ◽  
Low Load ◽  
Target Disk ◽  
Load Conditions

Visual working memory (VWM) representations interact with attentional guidance, but there is controversy over whether multiple VWM items simultaneously influence attentional guidance. Extant studies relied on continuous variables like response times, which can obscure capture – especially if VWM representations cycle through interactive and non-interactive states. We employed an oculomotor paradigm to characterize discrete attentional capture events under both high and low VWM load. Participants held one or two colors in memory, then executed a saccade to a target disk. On some trials, a distractor (sometimes VWM-matching) appeared simultaneous with the target. Eye movements were more frequently directed to a VWM-matching than a non-matching distractor for both load conditions. However, oculomotor capture by a VWM-matching distractor occurred less frequently (by approximately half) under high compared with low load. These results suggest that, without task demands to maintain both, one VWM item is held in an active state at a time.

scholarly journals Oculomotor capture reveals trial-by-trial neural correlates of attentional guidance by contents of visual working memory

2018 ◽  
Author(s):  
Valerie M. Beck ◽  
Timothy J. Vickery
Keyword(s):  
Working Memory ◽  
Retention Interval ◽  
Visual Working Memory ◽  
Attentional Capture ◽  
Anterior Cingulate ◽  
Saccade Target ◽  
Neural Basis ◽  
Oculomotor Capture ◽  
Attentional Guidance ◽  
Task Irrelevant

AbstractEvidence from attentional and oculomotor capture, contingent capture, and other paradigms suggests that mechanisms supporting human visual working memory (VWM) and visual attention are intertwined. Features held in VWM bias guidance toward matching items even when those features are task irrelevant. However, the neural basis of this interaction is underspecified. Prior examinations using fMRI have primarily relied on coarse comparisons across experimental conditions that produce varying amounts of capture. To examine the neural dynamics of attentional capture on a trial-by-trial basis, we applied an oculomotor paradigm that produced discrete measures of capture. On each trial, subjects were shown a memory item, followed by a blank retention interval, then a saccade target that appeared to the left or right. On some trials, an irrelevant distractor appeared above or below fixation. Once the saccade target was fixated, subjects completed a forced-choice memory test. Critically, either the target or distractor could match the feature held in VWM. Although task irrelevant, this manipulation produced differences in behavior: participants were more likely to saccade first to an irrelevant VWM-matching distractor compared with a non-matching distractor – providing a discrete measure of capture. We replicated this finding while recording eye movements and scanning participants’ brains using fMRI. To examine the neural basis of oculomotor capture, we separately modeled the retention interval for capture and non-capture trials within the distractor-match condition. We found that frontal activity, including anterior cingulate cortex and superior frontal gyrus regions, differentially predicted subsequent oculomotor capture by a memory-matching distractor. Other regions previously implicated as involved in attentional capture by VWM-matching items showed no differential activity across capture and no-capture trials, even at a liberal threshold. Our findings demonstrate the power of trial-by-trial analyses of oculomotor capture as a means to examine the underlying relationship between VWM and attentional guidance systems.

scholarly journals Neural correlates of visual working memory precision in frontal and parietal cortex

2014 ◽  
Vol 14 (10) ◽  
pp. 895-895
Author(s):  
Q. Yu ◽  
W. M. Shim
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Parietal Cortex ◽  
Neural Correlates ◽  
Memory Precision

scholarly journals Visual working memory load disrupts the space‐based attentional guidance of target selection

2018 ◽  
Vol 110 (2) ◽  
pp. 357-371 ◽  
Author(s):  
Nick Berggren ◽  
Martin Eimer
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Memory Load ◽  
Target Selection ◽  
Working Memory Load ◽  
Attentional Guidance

scholarly journals The neural correlates of visual working memory encoding: A time-resolved fMRI study

2011 ◽  
Vol 49 (6) ◽  
pp. 1527-1536 ◽  
Author(s):  
J. Jay Todd ◽  
Suk Won Han ◽  
Stephenie Harrison ◽  
René Marois
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Correlates ◽  
Memory Encoding ◽  
Time Resolved ◽  
Fmri Study

scholarly journals Neural Correlates of Visual Working Memory

Neuron ◽  
2002 ◽  
Vol 35 (5) ◽  
pp. 975-987 ◽  
Author(s):  
Luiz Pessoa ◽  
Eva Gutierrez ◽  
Peter A. Bandettini ◽  
Leslie G. Ungerleider
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Correlates

Double dissociation in neural correlates of visual working memory: A PET study

2005 ◽  
Vol 25 (3) ◽  
pp. 747-759 ◽  
Author(s):  
J. Ventre-Dominey ◽  
A. Bailly ◽  
F. Lavenne ◽  
D. LeBars ◽  
H. Mollion ◽  
...  
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Correlates ◽  
Double Dissociation

scholarly journals Dissociation of neural correlates of verbal and non-verbal visual working memory with different delays

2007 ◽  
Vol 3 (1) ◽  
pp. 56 ◽  
Author(s):  
Christoph Rothmayr ◽  
Oliver Baumann ◽  
Tor Endestad ◽  
Roland M Rutschmann ◽  
Svein Magnussen ◽  
...  
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Correlates

scholarly journals Neural correlates of shape–color binding in visual working memory

2014 ◽  
Vol 52 ◽  
pp. 27-36 ◽  
Author(s):  
Mario A. Parra ◽  
Sergio Della Sala ◽  
Robert H. Logie ◽  
Alexa M. Morcom
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Correlates

Neural correlates of visual working memory: BOLD predicts task performance

NeuroImage ◽  
2001 ◽  
Vol 13 (6) ◽  
pp. 720 ◽  
Author(s):  
Luiz Pessoa ◽  
Eva Gutierrez ◽  
Peter A. Bandettini ◽  
Leslie Ungerleider
Keyword(s):  
Working Memory ◽  
Task Performance ◽  
Visual Working Memory ◽  
Neural Correlates
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