scholarly journals Dissociable Neural Mechanisms for Capacity & Resolution in Visual Working Memory

2014 ◽  
Vol 14 (10) ◽  
pp. 164-164
Author(s):  
M. Cappiello ◽  
W. Xie ◽  
W. Zhang
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Mechanisms

The neural mechanisms of percept–memory comparison in visual working memory

2012 ◽  
Vol 90 (1) ◽  
pp. 71-79 ◽  
Author(s):  
Jun Yin ◽  
Zaifeng Gao ◽  
Xinyi Jin ◽  
Xiaowei Ding ◽  
Junying Liang ◽  
...  
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Mechanisms

scholarly journals Neural Mechanisms of Visual Working Memory in Prefrontal Cortex of the Macaque

1996 ◽  
Vol 16 (16) ◽  
pp. 5154-5167 ◽  
Author(s):  
Earl K. Miller ◽  
Cynthia A. Erickson ◽  
Robert Desimone
Keyword(s):  
Working Memory ◽  
Prefrontal Cortex ◽  
Visual Working Memory ◽  
Neural Mechanisms

scholarly journals Neural mechanisms underlying the precision of visual working memory

2018 ◽  
Author(s):  
Yijie Zhao ◽  
Shuguang Kuai ◽  
Theodore P. Zanto ◽  
Yixuan Ku
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Memory Load ◽  
Neural Mechanisms ◽  
Behavioral Experiment ◽  
Working Memory Load ◽  
Lateral Occipital Complex ◽  
The Individual ◽  
Memory Precision ◽  
The Brain

AbstractThe neural mechanisms associated with the limited capacity of working memory has long been studied, but it is still unclear how the brain maintains the fidelity of representations in working memory. Here, an orientation recall task for estimating the precision of visual working memory was performed both inside and outside an fMRI scanner. Results showed that the trial-by-trial recall error (in radians) was correlated with delay period activity in the lateral occipital complex (LOC) during working memory maintenance, regardless of the memory load. Moreover, delay activity in LOC also correlated with the individual participant’s precision of working memory from a separate behavioral experiment held two weeks prior. Furthermore, a region within the prefrontal cortex, the inferior frontal junction (IFJ), exhibited greater functional connectivity with LOC when the working memory load increased. Together, our findings provide unique evidence that the LOC supports visual working memory precision, while communication between the IFJ and LOC varys with visual working memory load.

scholarly journals Neural Mechanisms of Expert Skills in Visual Working Memory

2006 ◽  
Vol 26 (43) ◽  
pp. 11187-11196 ◽  
Author(s):  
C. D. Moore ◽  
M. X. Cohen ◽  
C. Ranganath
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Mechanisms

scholarly journals Distinct neural mechanisms for spatially lateralized and spatially global visual working memory representations

2016 ◽  
Vol 116 (4) ◽  
pp. 1715-1727 ◽  
Author(s):  
Keisuke Fukuda ◽  
Min-Suk Kang ◽  
Geoffrey F. Woodman
Keyword(s):  
Working Memory ◽  
Visual Cortex ◽  
Visual Working Memory ◽  
Imaging Techniques ◽  
Event Related Potentials ◽  
Neural Mechanisms ◽  
Electrophysiological Studies ◽  
Related Potentials ◽  
Memory Representations ◽  
Α Band

Visual working memory (VWM) allows humans to actively maintain a limited amount of information. Whereas previous electrophysiological studies have found that lateralized event-related potentials (ERPs) track the maintenance of information in VWM, recent imaging experiments have shown that spatially global representations can be read out using the activity across the visual cortex. The goal of the present study was to determine whether both lateralized and spatially global electrophysiological signatures coexist. We first show that it is possible to simultaneously measure lateralized ERPs that track the number of items held in VWM from one visual hemfield and parietooccipital α (8–12 Hz) power over both hemispheres indexing spatially global VWM representations. Next, we replicated our findings and went on to show that this bilateral parietooccipital α power as well as the contralaterally biased ERP correlate of VWM carries a signal that can be used to decode the identity of the representations stored in VWM. Our findings not only unify observations across electrophysiology and imaging techniques but also suggest that ERPs and α-band oscillations index different neural mechanisms that map on to lateralized and spatially global representations, respectively.

scholarly journals Neural mechanisms of precision in visual working memory for faces

2017 ◽  
Vol 17 (10) ◽  
pp. 345
Author(s):  
Elizabeth Lorenc ◽  
Mark D'Esposito
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Mechanisms

scholarly journals The neural mechanisms underlying the maintenance of visual working memory contents

2018 ◽  
Vol 63 (27) ◽  
pp. 2883-2895
Author(s):  
Jiang Qiu ◽  
Taiyong Bi ◽  
Xiaogang Wang ◽  
Na Sang ◽  
Fan Zhang ◽  
...  
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Mechanisms ◽  
Memory Contents

scholarly journals Neural Mechanisms Underlying Reviewing Feature Binding of Color and Letter in Visual Working Memory

2019 ◽  
Vol 19 (10) ◽  
pp. 201c
Author(s):  
Jun Saiki ◽  
Bo-Cheng Kuo ◽  
Ya-Ping Chen ◽  
Tomoya Kawashima
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Neural Mechanisms ◽  
Feature Binding

scholarly journals Perceptual Comparisons Modulate Memory Biases Induced by Overlapping Visual Input

2020 ◽  
Author(s):  
Joseph M. Saito ◽  
Matthew Kolisnyk ◽  
Keisuke Fukuda
Keyword(s):  
Working Memory ◽  
Recent Work ◽  
Visual Working Memory ◽  
Visual Input ◽  
Neural Mechanisms ◽  
Causal Role ◽  
Specific Information ◽  
Memory Biases ◽  
Physical Similarity

Despite the active neural mechanisms that support the temporary maintenance of stimulus-specific information, visual working memory (VWM) content can be systematically biased towards novel perceptual input. These memory biases are commonly attributed to interference that arises when perceptual input is physically similar to current VWM content. However, recent work has suggested that deliberately comparing the similarity of VWM representations to novel perceptual input modulates the size of memory biases above and beyond stimulus-driven effects. Here, we sought to determine the modulatory nature of deliberate perceptual comparisons by comparing the size of memory biases following deliberate comparisons to those induced instead when novel perceptual input is ignored (Experiment 1) or encoded into VWM (Experiment 2). We find that individuals reported larger attraction biases in their VWM representation following deliberate perceptual comparisons than when they ignored or remembered the perceptual input. An analysis of participants’ perceptual comparisons revealed that memory biases were amplified when the perceptual input was endorsed as similar—but not dissimilar—to the current VWM representation. This pattern persisted even after the physical similarity between the VWM representation and perceptual input was matched across trials, confirming that perceptual comparisons themselves played a causal role in modulating memory biases. Together, these findings are consistent with the view that using a VWM representation to evaluate novel perceptual input risks exaggerating the featural overlap between them.

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