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

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

Dissecting Contributions of Prefrontal Cortex and Fusiform Face Area to Face Working Memory

2003 ◽  
Vol 15 (6) ◽  
pp. 771-784 ◽  
Author(s):  
T. Jason Druzgal ◽  
Mark D'Esposito
Keyword(s):  
Working Memory ◽  
Prefrontal Cortex ◽  
Visual Working Memory ◽  
Memory Load ◽  
Recognition Task ◽  
Fusiform Face Area ◽  
Face Area ◽  
Neural Information ◽  
Behaving Monkeys ◽  
Visual Cortical

Interactions between prefrontal cortex (PFC) and stimulusspecific visual cortical association areas are hypothesized to mediate visual working memory in behaving monkeys. To clarify the roles for homologous regions in humans, event-related fMRI was used to assess neural activity in PFC and fusiform face area (FFA) of subjects performing a delay-recognition task for faces. In both PFC and FFA, activity increased parametrically with memory load during encoding and maintenance of face stimuli, despite quantitative differences in the magnitude of activation. Moreover, timing differences in PFC and FFA activation during memory encoding and retrieval implied a context dependence in the flow of neural information. These results support existing neurophysiological models of visual working memory developed in the nonhuman primate.

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 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

scholarly journals Reduced anterior prefrontal cortex activation in young binge drinkers during a visual working memory task

2010 ◽  
Vol 109 (1-3) ◽  
pp. 45-56 ◽  
Author(s):  
Alberto Crego ◽  
Socorro Rodriguez-Holguín ◽  
María Parada ◽  
Nayara Mota ◽  
Montserrat Corral ◽  
...  
Keyword(s):  
Working Memory ◽  
Prefrontal Cortex ◽  
Visual Working Memory ◽  
Memory Task ◽  
Binge Drinkers ◽  
Anterior Prefrontal Cortex

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.

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