Event-related potentials in a working-memory task in schizophrenics and controls

2000 ◽  
Vol 46 (2-3) ◽  
pp. 175-186 ◽  
Author(s):  
Andreas Löw ◽  
Brigitte Rockstroh ◽  
Silke Harsch ◽  
Patrick Berg ◽  
Rudolf Cohen
Keyword(s):  
Working Memory ◽  
Memory Task ◽  
Event Related Potentials ◽  
Related Potentials

Association Between the Visual N1-P2 Complex and Neuroticism

2021 ◽  
pp. 155005942110399
Author(s):  
Bowen Xiu ◽  
Christopher Andanty ◽  
Nasia Dai ◽  
Clement C. Zai ◽  
Ariel Graff ◽  
...  
Keyword(s):  
Working Memory ◽  
Error Detection ◽  
Memory Task ◽  
Event Related Potentials ◽  
Related Potentials ◽  
Significant Performance ◽  
Impaired Attention ◽  
Electroencephalographic Activity ◽  
Healthy Participants ◽  
P200 Amplitude

Neuroticism is a personality trait associated with impaired attention, memory, and error detection. Thus, the present study investigated the visual N100 and P200 event-related potentials components associated with attention using a 2-back working memory task in healthy neurotic and nonneurotic participants, evaluated using the Neuroticism, Extraversion, Openness Five Factor Inventory. A total of 35 healthy participants were asked to perform the 2-back task while recording electroencephalographic activity from 64 electrodes on the scalp. Analysis of the N100 and P200 amplitude and latency in high neuroticism and low neuroticism subjects showed an increased P200 amplitude and latency for high neuroticism subjects in the frontal and parietal regions, respectively. However, there were no significant performance differences between the high and low neuroticism subjects for the 2-back working memory task. Therefore, the results suggest that neuroticism is associated with the P200 component elicited in the context of a working memory task.

Event-Related Potentials in Young and Elderly Adults during a Visual Spatial Working Memory Task

2004 ◽  
Vol 35 (4) ◽  
pp. 185-192 ◽  
Author(s):  
Verner Knott ◽  
Anne Millar ◽  
Louise Dulude ◽  
Lisa Bradford ◽  
Fahad Alwahhabi ◽  
...  
Keyword(s):  
Working Memory ◽  
Spatial Working Memory ◽  
Memory Task ◽  
Event Related Potentials ◽  
Elderly Adults ◽  
Visual Spatial ◽  
Related Potentials ◽  
Visual Spatial Working Memory

scholarly journals Brain Processing of Complex Geometric Forms in a Visual Memory Task Increases P2 Amplitude

2020 ◽  
Vol 10 (2) ◽  
pp. 114
Author(s):  
Héctor A. Cepeda-Freyre ◽  
Gregorio Garcia-Aguilar ◽  
Jose R. Eguibar ◽  
Carmen Cortes
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Cognitive Processing ◽  
Visual Memory ◽  
Memory Load ◽  
Memory Task ◽  
Event Related Potentials ◽  
Brain Regions ◽  
Test Phase ◽  
Related Potentials

We study the cognitive processing of visual working memory in three different conditions of memory load and configuration change. Altering this features has been shown to alter the brain’s processing in memory tasks. Most studies dealing with this issue have used the verbal-phonological modality. We use complex geometric polygons to assess visual working memory in a modified change detection task. Three different types of backgrounds were used to manipulate memory loading and 18 complex geometric polygons to manipulate stimuli configuration. The goal of our study was to test whether the memory load and configuration affect the correct-recall ratios. We expected that increasing visual items loading and changing configuration of items would induce differences in working memory performance. Brain activity related to the task was assessed through event-related potentials (ERP), during the test phase of each trial. Our results showed that visual items loading and changing of item configuration affect working memory on test phase on ERP component P2, but does not affect performance. However frontal related ERP component—P3—was minimally affected by visual memory loading or configuration changing, supporting that working memory is related to a filtering processing in posterior brain regions.

The Role of Spatial Selective Attention in Working Memory for Locations: Evidence from Event-Related Potentials

2000 ◽  
Vol 12 (5) ◽  
pp. 840-847 ◽  
Author(s):  
Edward Awh ◽  
Lourdes Anllo-Vento ◽  
Steven A. Hillyard
Keyword(s):  
Working Memory ◽  
Selective Attention ◽  
Visual Processing ◽  
Spatial Working Memory ◽  
Memory Task ◽  
Stimulus Display ◽  
Event Related Potentials ◽  
Related Potentials ◽  
On Line ◽  
Multichannel Recordings

We investigated the hypothesis that the covert focusing of spatial attention mediates the on-line maintenance of location information in spatial working memory. During the delay period of a spatial working-memory task, behaviorally irrelevant probe stimuli were flashed at both memorized and nonmemorized locations. Multichannel recordings of event-related potentials (ERPs) were used to assess visual processing of the probes at the different locations. Consistent with the hypothesis of attention-based rehearsal, early ERP components were enlarged in response to probes that appeared at memorized locations. These visual modulations were similar in latency and topography to those observed after explicit manipulations of spatial selective attention in a parallel experimental condition that employed an identical stimulus display.

Event-related potentials (ERP) during a visual working memory task in first episode and chronic schizophrenia

1997 ◽  
Vol 24 (1-2) ◽  
pp. 239
Author(s):  
Daniel Umbricht ◽  
Daniel Javitt ◽  
John Bates ◽  
Simcha Pollak ◽  
Jeffrey Lieberman ◽  
...  
Keyword(s):  
Working Memory ◽  
Visual Working Memory ◽  
Memory Task ◽  
Event Related Potentials ◽  
Chronic Schizophrenia ◽  
First Episode ◽  
Related Potentials
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