Event-related potentials in a passive and active auditory condition: effects of diazepam and buspirone on slow wave positivity

1997 ◽  
Vol 46 (2) ◽  
pp. 101-111 ◽  
Author(s):  
A. Unrug ◽  
E.L.J.M. van Luijtelaar ◽  
M.G.H. Coles ◽  
A.M.L. Coenen
Keyword(s):  
Slow Wave ◽  
Event Related Potentials ◽  
Auditory Condition ◽  
Related Potentials

Face and Word Recognition in Patients with Left and Right Hemispheric Lesions: Evidence from Reaction Times and ERPs

2002 ◽  
Vol 13 (1) ◽  
pp. 69-83 ◽  
Author(s):  
Stefan R. Schweinberger ◽  
Thomas Klos ◽  
Werner Sommer
Keyword(s):  
Slow Wave ◽  
Reaction Times ◽  
Memory Search ◽  
Event Related Potentials ◽  
Performance Deficits ◽  
Set Size ◽  
Left Brain ◽  
Related Potentials ◽  
Abstract Words ◽  
Left Brain Damage

Abstract: We recorded reaction times (RTs) and event-related potentials (ERPs) in patients with unilateral lesions during a memory search task. Participants memorized faces or abstract words, which were then recognized among new ones. The RT deficit found in patients with left brain damage (LBD) for words increased with memory set size, suggesting that their problem relates to memory search. In contrast, the RT deficit found in patients with RBD for faces was apparently related to perceptual encoding, a conclusion also supported by their reduced P100 ERP component. A late slow wave (720-1720 ms) was enhanced in patients, particularly to words in patients with LBD, and to faces in patients with RBD. Thus, the slow wave was largest in the conditions with most pronounced performance deficits, suggesting that it reflects deficit-related resource recruitment.

scholarly journals An Investigation of a Frontal Negative Slow Wave in a Virtual Hedonic Purchase Task

2021 ◽  
Vol 15 ◽  
Author(s):  
Yupeng Mei ◽  
Kunpeng Jing ◽  
Lele Chen ◽  
Rui Shi ◽  
Zhijie Song
Keyword(s):  
Slow Wave ◽  
Event Related Potentials ◽  
Neural Substrates ◽  
Sales Promotion ◽  
Price Promotion ◽  
Hedonic Consumption ◽  
Charitable Donation ◽  
Related Potentials

There is a connection between the frontal negative slow wave (FNSW) and the arousal inhibition in the hedonic purchase context. To calculate the FNSW (400–800 ms), event-related potentials (ERPs) method was applied to depict the neural substrates on prudent and impulsive consumers’ behaviors within various states of promotion. Promotion types include the pure price promotion and the mixed promotion (a mixture of a charitable donation and a discount). Behaviorally, consumers response more quickly in the pure price promotion condition and they express a preference for the mixed promotion. More importantly, a larger FNSW emerged in the impulsive consumers than the prudent, suggesting that the former might tend to control their eagerness to consume hedonic items. Compared with the price promotion as the worse option, the mixed promotion as the better option caused more perceptual conflict, leading to an increase in N2 amplitude. It suggests that consumers incline to reject the worse offers. These results also reveal that people primarily have to search negative promotion information by their insight and subsequently impulsive consumers inhibit the responses to the promotion information. The method of ERPs and FNSW should be helpful for marketing researchers and professionals on hedonic consumption and sales promotion.

Abnormalities in Event-Related Potentials, N100, P200, P300 and Slow Wave in Schizophrenia

1991 ◽  
Vol 45 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Chikara Ogura ◽  
Yasuhiro Nageishi ◽  
Minora Matsubayashi ◽  
Fumiaki Omura ◽  
Akira Kishimoto ◽  
...  
Keyword(s):  
Slow Wave ◽  
Event Related Potentials ◽  
Related Potentials

P3B and Positive Slow Wave following Real and Dummy Feedback on Arithmetic Rule-Learning and Perceptuomotor Tasks

1997 ◽  
Vol 84 (1) ◽  
pp. 195-216
Author(s):  
Bruce E. McDonough ◽  
Charles A. Warren
Keyword(s):  
Slow Wave ◽  
Green Light ◽  
Rule Learning ◽  
Event Related Potentials ◽  
Learning Task ◽  
Feedback Information ◽  
Feedback Display ◽  
Related Potentials ◽  
Numeric Information

Event-related Potentials (ERPs) were recorded to feedback during a cognitively demanding, arithmetic rule-learning task and a relatively simple, skill-oriented, perceptuomotor task. For both tasks, a compound feedback display was employed. It consisted of numeric feedback information presented simultaneously with a red or green light (50% each) which indicated whether the numeric information was real (valid) or dummy (invalid). The task and feedback-validity manipulations showed a functional dissociation between the P3b (350–450 msec.) and a Positive Slow Wave (600–900 msec.). P3b was larger for real than for dummy feedback; Positive Slow Wave was larger for rule-learning than for perceptuomotor tasks.

The Effect of Food Deprivation on ERP During Identification of Tachistoscopically Presented Food-Related Words

2001 ◽  
Vol 15 (3) ◽  
pp. 163-172 ◽  
Author(s):  
W. Plihal ◽  
C. Haenschel ◽  
P. Hachl ◽  
J. Born ◽  
R. Pietrowsky
Keyword(s):  
Food Deprivation ◽  
Slow Wave ◽  
Event Related Potentials ◽  
Sexual Stimuli ◽  
Tachistoscopic Presentation ◽  
Related Potentials ◽  
Effect Of Food ◽  
The One ◽  
Stimulus Identification ◽  
Sexual Words

Abstract The present study served to investigate the effects of food deprivation on the identification of subliminally presented food-related words by means of event-related potentials (ERPs). ERPs were recorded in 16 hungry and 16 satiated subjects during repeated tachistoscopic presentation of food-related words (food names) and food-unrelated words (neutral words, sexual words) as controls. ERPs were recorded during each presentation of a word prior to identification and during the first presentation after identification and exhibited N1, P2, and slow-wave components. The number of tachistoscopic presentations until identification was not affected by hunger and satiety. However, ERPs were differentially affected by hunger and satiety: the P2 to food-related words was larger in hungry subjects compared to satiated subjects in all presentations. Additionally, the P2 was also larger to sexual words in hungry subjects in all presentations except the one preceding the identification response. The slow wave was not affected by hunger but increased with progressing stimulus identification. Following the identification of the words, all ERP components markedly declined in amplitude. The results indicate that hunger affects the processing of food and sexual stimuli during identification at an early ERP component (P2) even if the stimuli are not fully identified. In contrast, the later slow wave is sensitive to progressing stimulus identification, irrespective of hunger and stimulus meaning.

Frontal and Posterior Erps Related to Line Bisection

2007 ◽  
Vol 105 (2) ◽  
pp. 587-608 ◽  
Author(s):  
Metehan Çiçek ◽  
Ereian Nalçaci ◽  
Canan Kalaycioğlu
Keyword(s):  
Prefrontal Cortex ◽  
Slow Wave ◽  
Test Performance ◽  
Right Hemisphere ◽  
Event Related Potentials ◽  
Line Bisection ◽  
Spatial Processing ◽  
Dynamic Nature ◽  
Related Potentials ◽  
The Right

The aim of this study was to investigate the dynamic nature of the cortical visuospatial attention processes during the line bisection test, which is sensitive to perceptual asymmetries. EEGs of 26 normal volunteers were recorded during the administration of a computerized line bisection test, which requires participants mark the midline of lines using a mouse. Two event-related potentials subsequent and time locked to the line presentations, namely, P300 and a positive slow wave, were obtained. Findings suggested that both potentials were related to the test performance, and the right hemisphere was more active. Analysis suggested a right parietotemporal and superior parietal locus for the P300 and right prefrontal activity for the positive slow wave. A dynamic asymmetrical activity was identified, such that after primary visual perception, spatial processing is then initiated in the right parietotemporal cortex and then proceeds to the right prefrontal cortex.

scholarly journals Pupil Dilation and the Slow Wave ERP Reflect Surprise about Choice Outcome Resulting from Intrinsic Variability in Decision Confidence

2021 ◽  
Author(s):  
Jan Willem de Gee ◽  
Camile M C Correa ◽  
Matthew Weaver ◽  
Tobias H Donner ◽  
Simon van Gaal
Keyword(s):  
Slow Wave ◽  
Animal Cognition ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Decision Task ◽  
Intrinsic Variability ◽  
Wave Event ◽  
The Face ◽  
Related Potentials ◽  
Physiological Markers

Abstract Central to human and animal cognition is the ability to learn from feedback in order to optimize future rewards. Such a learning signal might be encoded and broadcasted by the brain’s arousal systems, including the noradrenergic locus coeruleus. Pupil responses and the positive slow wave component of event-related potentials reflect rapid changes in the arousal level of the brain. Here, we ask whether and how these variables may reflect surprise: the mismatch between one’s expectation about being correct and the outcome of a decision, when expectations fluctuate due to internal factors (e.g., engagement). We show that during an elementary decision task in the face of uncertainty both physiological markers of phasic arousal reflect surprise. We further show that pupil responses and slow wave event-related potential are unrelated to each other and that prediction error computations depend on feedback awareness. These results further advance our understanding of the role of central arousal systems in decision-making under uncertainty.

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