scholarly journals Steady state visually evoked potential (SSVEP) phase change as an index of Spatial Working Memory task performance: The influence of nootropic supplementation

2014 ◽  
Vol 94 (2) ◽  
pp. 185 ◽  
Author(s):  
David A. Camfield ◽  
Andrew Scholey ◽  
Richard Silberstein ◽  
Andrew Pipingas ◽  
Con Stough
Keyword(s):  
Working Memory ◽  
Steady State ◽  
Phase Change ◽  
Task Performance ◽  
Evoked Potential ◽  
Spatial Working Memory ◽  
Memory Task ◽  
Visually Evoked Potential

Steady state visually evoked potential (SSVEP) topography in a graded working memory task

2001 ◽  
Vol 42 (2) ◽  
pp. 219-232 ◽  
Author(s):  
Richard B Silberstein ◽  
Paul L Nunez ◽  
Andrew Pipingas ◽  
Philip Harris ◽  
Frank Danieli
Keyword(s):  
Working Memory ◽  
Steady State ◽  
Evoked Potential ◽  
Memory Task ◽  
Visually Evoked Potential

scholarly journals Phenomenology of Visuo-spatial Working Memory Task Performance

2021 ◽  
Author(s):  
Aleš Oblak ◽  
Anka Slana Ozimič ◽  
Grega Repovš ◽  
Urban Kordeš
Keyword(s):  
Working Memory ◽  
Cognitive Psychology ◽  
Task Performance ◽  
Present Article ◽  
Spatial Working Memory ◽  
Memory Task ◽  
Bodily Feelings ◽  
Psychological Tasks

In experimental cognitive psychology, objects of inquiry have typically been operationalized with psychological tasks. If we are interested in measuring the target phenomena, we must inquire into the validity of the task; that is, to what extent does the task elicit the phenomenon in question. If we subscribe to the second view, evaluating the validity and the interpretation of the gathered data can be supplemented by understanding the experience of solving psychological tasks. The aim of the present article is to investigate how individuals experience performing a psychological task, specifically, a visuo-spatial working memory task. We present ethnographic descriptions of different ways individuals can experience the same task. We focus on aspects of experience that comprise the overall sense of experience (e.g., bodily feelings, emotional atmosphere, mood). We discuss the methodological implications of our findings and the possibility of conducting a neurophenomenology of visuo-spatial working memory.

Cortical Gamma Neural Synchrony Deficits in Schizophrenia Patients During Spatial Working Memory Task Performance

NeuroImage ◽  
2009 ◽  
Vol 47 ◽  
pp. S136
Author(s):  
S. Kang ◽  
A.W. MacDonald ◽  
M.V. Chafee ◽  
C. Im ◽  
S.R. Sponheim
Keyword(s):  
Working Memory ◽  
Task Performance ◽  
Spatial Working Memory ◽  
Memory Task ◽  
Neural Synchrony

scholarly journals Modulation of Peak Alpha Frequency Oscillations During Working Memory Is Greater in Females Than Males

2021 ◽  
Vol 15 ◽  
Author(s):  
Tara R. Ghazi ◽  
Kara J. Blacker ◽  
Thomas T. Hinault ◽  
Susan M. Courtney
Keyword(s):  
Working Memory ◽  
Task Performance ◽  
Spatial Working Memory ◽  
Memory Performance ◽  
Memory Task ◽  
Oscillatory Activity ◽  
Alpha Frequency ◽  
Visual Spatial ◽  
Significant Difference ◽  
Visual Spatial Working Memory

Peak alpha frequency is known to vary not just between individuals, but also within an individual over time. While variance in this metric between individuals has been tied to working memory performance, less understood are how short timescale modulations of peak alpha frequency during task performance may facilitate behavior. This gap in understanding may be bridged by consideration of a key difference between individuals: sex. Inconsistent findings in the literature regarding the relationship between peak alpha frequency and cognitive performance, as well as known sex-related-differences in peak alpha frequency and its modulation motivated our hypothesis that cognitive and neural processes underlying working memory—modulation of peak alpha frequency in particular—may differ based upon sex. Targeting sex as a predictive factor, we analyzed the EEG data of participants recorded while they performed four versions of a visual spatial working memory task. A significant difference between groups was present: females modulated peak alpha frequency more than males. Task performance did not differ by sex, yet a relationship between accuracy and peak alpha frequency was present in males, but not in females. These findings highlight the importance of considering sex as a factor in the study of oscillatory activity, particularly to further understanding of the neural mechanisms that underlie working memory.

scholarly journals Working Memory Performance under a Negative Affect Is More Susceptible to Higher Cognitive Workloads with Different Neural Haemodynamic Correlates

2021 ◽  
Vol 11 (7) ◽  
pp. 935
Author(s):  
Ying Xing Feng ◽  
Masashi Kiguchi ◽  
Wei Chun Ung ◽  
Sarat Chandra Dass ◽  
Ahmad Fadzil Mohd Hani ◽  
...  
Keyword(s):  
Working Memory ◽  
Task Performance ◽  
Memory Performance ◽  
Affective State ◽  
Memory Task ◽  
Interactive Effects ◽  
Functional Near Infrared Spectroscopy ◽  
Affective Factors ◽  
Related Stress ◽  
Haemodynamic Activity

The effect of stress on task performance is complex, too much or too little stress negatively affects performance and there exists an optimal level of stress to drive optimal performance. Task difficulty and external affective factors are distinct stressors that impact cognitive performance. Neuroimaging studies showed that mood affects working memory performance and the correlates are changes in haemodynamic activity in the prefrontal cortex (PFC). We investigate the interactive effects of affective states and working memory load (WML) on working memory task performance and haemodynamic activity using functional near-infrared spectroscopy (fNIRS) neuroimaging on the PFC of healthy participants. We seek to understand if haemodynamic responses could tell apart workload-related stress from situational stress arising from external affective distraction. We found that the haemodynamic changes towards affective stressor- and workload-related stress were more dominant in the medial and lateral PFC, respectively. Our study reveals distinct affective state-dependent modulations of haemodynamic activity with increasing WML in n-back tasks, which correlate with decreasing performance. The influence of a negative effect on performance is greater at higher WML, and haemodynamic activity showed evident changes in temporal, and both spatial and strength of activation differently with WML.

scholarly journals Brain hemodynamic response in Examiner–Examinee dyads during spatial short-term memory task: an fNIRS study

2021 ◽  
Author(s):  
Francesco Panico ◽  
Stefania De Marco ◽  
Laura Sagliano ◽  
Francesca D’Olimpio ◽  
Dario Grossi ◽  
...  
Keyword(s):  
Working Memory ◽  
Cognitive Processes ◽  
Short Term Memory ◽  
Spatial Working Memory ◽  
Brain Activity ◽  
Memory Task ◽  
Neural Correlates ◽  
Short Term ◽  
Term Memory ◽  
The Real

AbstractThe Corsi Block-Tapping test (CBT) is a measure of spatial working memory (WM) in clinical practice, requiring an examinee to reproduce sequences of cubes tapped by an examiner. CBT implies complementary behaviors in the examiners and the examinees, as they have to attend a precise turn taking. Previous studies demonstrated that the Prefrontal Cortex (PFC) is activated during CBT, but scarce evidence is available on the neural correlates of CBT in the real setting. We assessed PFC activity in dyads of examiner–examinee participants while completing the real version of CBT, during conditions of increasing and exceeding workload. This procedure allowed to investigate whether brain activity in the dyads is coordinated. Results in the examinees showed that PFC activity was higher when the workload approached or reached participants’ spatial WM span, and lower during workload conditions that were largely below or above their span. Interestingly, findings in the examiners paralleled the ones in the examinees, as examiners’ brain activity increased and decreased in a similar way as the examinees’ one. In the examiners, higher left-hemisphere activity was observed suggesting the likely activation of non-spatial WM processes. Data support a bell-shaped relationship between cognitive load and brain activity, and provide original insights on the cognitive processes activated in the examiner during CBT.

Neuropsychological impairment in patients with major depressive disorder: the effects of feedback on task performance

2003 ◽  
Vol 33 (3) ◽  
pp. 455-467 ◽  
Author(s):  
F. C. MURPHY ◽  
A. MICHAEL ◽  
T. W. ROBBINS ◽  
B. J. SAHAKIAN
Keyword(s):  
Working Memory ◽  
Negative Feedback ◽  
Performance Feedback ◽  
Visual Discrimination ◽  
Negative Reinforcement ◽  
Spatial Working Memory ◽  
Memory Task ◽  
Depressive Illness ◽  
Reversal Task ◽  
Depressed Patients

Background. Recent evidence suggests that an abnormal response to performance feedback may contribute to the wide-ranging neuropsychological deficits typically associated with depressive illness. The present research sought to determine whether the inability of depressed patients to utilize performance feedback advantageously is equally true for accurate and misleading feedback.Method. Patients with major depression and matched controls completed: (1) a visual discrimination and reversal task that featured intermittent and misleading negative feedback; and (2) feedback and no-feedback versions of a computerised test of spatial working memory. In the feedback version, negative feedback was accurate, highly informative, and could be used as a mnemonic aid.Results. On the Probability Reversal task, depressed patients were impaired in their ability to maintain response set in the face of misleading negative feedback as shown by their increased tendency to switch responding to the ‘incorrect’ stimulus following negative reinforcement, relative to that of controls. Patients' ability to acquire and reverse the necessary visual discrimination was unimpaired. On the Spatial Working Memory task, depressed patients made significantly more between-search errors than controls on the most difficult trials, but their ability to use negative feedback to facilitate performance remained intact.Conclusions. The present results suggest that feedback can have different effects in different contexts. Misleading, negative feedback appears to disrupt the performance of depressed patients, whereas negative but accurate feedback does not. These findings are considered in the context of recent studies on reinforcement systems and their associated neurobiological substrates.

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