Comparative Analytical Study of Evoked and Event Related Potentials as Correlates of Cognitive Processes.

1992 ◽  
Author(s):  
Theodore H. Bullock
Keyword(s):  
Cognitive Processes ◽  
Analytical Study ◽  
Event Related Potentials ◽  
Related Potentials

Event-related potentials as asymmetry indices of lateralized cognitive processes during music and verbal tasks

1987 ◽  
Vol 24 (2) ◽  
pp. 141-151 ◽  
Author(s):  
Vilfredo De Pascalis ◽  
Francesco Marucci ◽  
Pietronilla M. Penna
Keyword(s):  
Cognitive Processes ◽  
Event Related Potentials ◽  
Verbal Tasks ◽  
Related Potentials

scholarly journals Eye-Fixation-Related Potentials: Insight into Parafoveal Processing

2005 ◽  
Vol 19 (3) ◽  
pp. 204-215 ◽  
Author(s):  
Thierry Baccino ◽  
Yves Manunta
Keyword(s):  
Target Word ◽  
Cognitive Processes ◽  
Event Related Potentials ◽  
Semantic Relatedness ◽  
Word Type ◽  
Factors Affecting ◽  
Eye Fixation ◽  
Related Potentials ◽  
The Right ◽  
Nonword Processing

Abstract. This paper presents a new methodology for studying cognition, which combines eye movements (EM) and event-related potentials (ERP) to track the cognitive processes that occur during a single eye fixation. This technique, called eye-fixation-related potentials (EFRP), has the advantage of coupling accurate time measures from ERPs and the location of the eye on the stimulus, so it can be used to disentangle perceptual/attentional/cognitive factors affecting reading. We tested this new technique to describe the controversial parafoveal-on-foveal effects on reading, which concern the question of whether two consecutive words are processed in parallel or sequentially. The experiment directly addressed this question by looking at whether semantic relatedness on a target word in a reading-like situation might affect the processing of a prime word. Three pair-word conditions were tested: A semantically associated target word (horse-mare), a semantically nonassociated target word (horse-table) and a nonword (horse-twsui); EFRPs were compared for all conditions. The results revealed that early ERP components differentiated word and nonword processing within 119 ms postfixation (N1 component). Moreover, the amplitude of the right centrofrontal P140 varied as a function of word type, being larger in response to nonassociated words than to nonwords. This component might index a spatial attention shift to the target word and its visual categorization, being highly sensitive to orthographic regularity and “ill-formedness” of words. The P2 consecutive component (peaking at 215 ms) differentiated associated words and nonassociated words, which can account for the semantic parafoveal effect. The EFRP technique, therefore, appears to be fruitful for establishing a time-line of early cognitive processes during reading.

Implicit need for affiliation and processing of emotional images: Event-related potential correlates

2018 ◽  
Vol 46 (2) ◽  
pp. 273-280
Author(s):  
Jianfeng Wang ◽  
Yan Wu ◽  
Lushi Jing
Keyword(s):  
Cognitive Processes ◽  
Event Related Potentials ◽  
Event Related Potential ◽  
Oddball Paradigm ◽  
Emotional Information ◽  
Need For Affiliation ◽  
Additional Information ◽  
Negative Images ◽  
Related Potentials ◽  
Emotional Information Processing

Implicit motives play an important role in the regulation of many basic cognitive processes, particularly in the stage of attention. We conducted a study with a sample of 58 college students to examine selective attention to emotional stimuli as a function of individual differences in the implicit need for affiliation (nAff). In an affective oddball paradigm, event-related potentials were recorded while participants viewed positive, neutral, and negative images of people. Results showed that individuals high in nAff elicited larger late positive potential amplitudes to negative images than those low in nAff did. These findings replicate and extend the results of a previous study focused on these relationships and provide additional information on the neural correlates of affiliation-related emotional information processing.

Loss of automatic processes and blunted-affect in depression: a P3 study

1993 ◽  
Vol 8 (6) ◽  
pp. 309-318 ◽  
Author(s):  
A Partiot ◽  
A Pierson ◽  
J Le Houezec ◽  
V Dodin ◽  
B Renault ◽  
...  
Keyword(s):  
Cognitive Dysfunction ◽  
Cognitive Processes ◽  
Depressive Episode ◽  
Negative Symptoms ◽  
Major Depressive Episode ◽  
Event Related Potentials ◽  
Depressive Mood ◽  
Automatic Processes ◽  
Major Depressive ◽  
Related Potentials

SummaryThe P3 components (P3a and P3b) of the event-related potentials have been analysed in sixteen in-patients with a major depressive episode (DSM III-R) according to their subtype - anxious-agitated and impulsive versus retarded and blunted-affect - assuming that these two opposite dimensions of the depressive mood would rely on different physiopathological mechanisms. The P3a component, which indexes automatic cognitive processes, was dramatically decreased in the retarded and blunted-affect group. This suggests that this special type of cognitive dysfunction in depression is rather related to negative symptoms than to depression itself.

Event-Related Potentials and Cognitive Processing of Affectively Toned Words in Depression

2002 ◽  
Vol 16 (1) ◽  
pp. 56-66 ◽  
Author(s):  
Marc Antony Serfaty ◽  
Robert Bothwell ◽  
Richard Marsh ◽  
Heather Ashton ◽  
Robert Blizard ◽  
...  
Keyword(s):  
Cognitive Processing ◽  
Cognitive Processes ◽  
Reaction Times ◽  
Event Related Potentials ◽  
Major Depressive ◽  
Depressed Patients ◽  
Electrophysiological Responses ◽  
Related Potentials ◽  
The Relationship ◽  
Neurophysiological Basis

Abstract Background: Depressed subjects and euthymic controls demonstrate differences in cognitive processing and brain electrophysiology. Contingent negative variation (CNV) and postimperative negative variation (PINV) was used to investigate the relationship between cognition and cortical event related potentials. Method: Electrophysiological responses and memory of different personality trait adjectives were measured in 15 patients with major depressive disorder and 15 euthymic controls. The words were presented acoustically to elicit event-related potentials. The subjects were asked to indicate whether the words were self-referential. Responses were measured separately for self referential and non-self referential, neutral, positively and negatively toned words. Results: Depressed patients chose more negative and fewer positive words as self-referential, though no significant differences between groups in CNV magnitude for any of the words were found. Persistence of cortical negativity after the motor response (PINV) was significantly (P < 0.02) greater in patients for all non-self-referential words, and reaction times were significantly longer for all words. Recall of positive words and recognition of all words were significantly impaired in patients. Conclusions: Both electrophysiological measures and memory tests found differences between depressed patients and controls, suggesting that the PINV wave may be a useful electrophysiological probe to clarify the neurophysiological basis of cognitive processes.

scholarly journals Analysis of the influence of bromazepam on cognitive performance through the visual evoked potential (P300)

2005 ◽  
Vol 63 (2a) ◽  
pp. 228-234 ◽  
Author(s):  
Fernanda Puga ◽  
Heloisa Veiga ◽  
Maurício Cagy ◽  
Kaleb McDowell ◽  
Roberto Piedade ◽  
...  
Keyword(s):  
Cognitive Processes ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Digit Span ◽  
Event Related Potentials ◽  
Oddball Paradigm ◽  
Behavioral Measures ◽  
Experimental Conditions ◽  
Double Blind ◽  
Related Potentials

Benzodiazepines have been used in the pharmacological treatment of anxiety for over four decades. However, very few studies have combined bromazepam and event-related potentials (ERP). The present study aimed at investigating the modulatory effects of this drug on brain dynamics. Specifically, the effects of bromazepam (3mg) on the P300 component of the ERP were tested in a double-blind experiment. The sample, consisting of 15 healthy subjects (7 male and 8 female), was submitted to a visual discrimination task, which employed the "oddball" paradigm. Electrophysiological (P300) and behavioral measures (stroop, digit span, and reaction time) were analyzed across three experimental conditions: placebo 1, placebo 2, and bromazepam. Results suggest that the effects of bromazepam (3mg) on cognitive processes are not apparent. In spite of what seems irrefutable in current literature, bromazepam did not produce evident effects on the behavioral and electrophysiological variables analyzed.

scholarly journals Repetition Attenuates the Influence of Recency on Recognition Memory: Behavioral and Electrophysiological Evidence

2019 ◽  
Author(s):  
John E. Scofield ◽  
Mason H. Price ◽  
Angélica Flores ◽  
Edgar C. Merkle ◽  
Jeffrey D. Johnson
Keyword(s):  
Recognition Memory ◽  
Cognitive Processes ◽  
Response Times ◽  
Recognition Task ◽  
Event Related Potentials ◽  
Neural Signals ◽  
Serial Search ◽  
The Past ◽  
Related Potentials ◽  
The Relationship

ABSTRACTStudies of recognition memory often demonstrate a recency effect on behavioral performance, whereby response times (RTs) are faster for stimuli that were previously presented recently as opposed to more remotely in the past. This relationship between performance and presentation lag has been taken to reflect that memories are accessed by serially searching backwards in time, such that RT indicates the self-terminating moment of such a process. Here, we investigated the conditions under which this serial search gives way to more efficient means of retrieving memories. Event-related potentials (ERPs) were recorded during a continuous recognition task in which subjects made binary old/new judgments to stimuli that were each presented up to four times across a range of lags. Stimulus repetition and shorter presentation lag both gave rise to speeded RTs, consistent with previous findings, and we novelly extend these effects to a robust latency measure of the left parietal ERP effect associated with retrieval success. Importantly, the relationship between repetition and recency was further elucidated, such that repetition attenuated lag-related differences that were initially present in both the behavioral and neural latency data. These findings are consistent with the idea that a serial search through recent memory can quickly be abandoned in favor of relying on more efficient ‘time-independent’ cognitive processes or neural signals.

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