Stability of non-target event related potentials to target stimuli of different duration and/or frequency

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.

Download Full-text

Central Nervous System Processing of Emotions in Children with Fecal Incontinence and Constipation

Zeitschrift für Kinder- und Jugendpsychiatrie und Psychotherapie ◽

10.1024/1422-4917/a000638 ◽

2019 ◽

Vol 47 (1) ◽

pp. 67-71

Author(s):

Monika Equit ◽

Justine Niemczyk ◽

Anna Kluth ◽

Carla Thomas ◽

Mathias Rubly ◽

...

Keyword(s):

Central Nervous System ◽

Nervous System ◽

Fecal Incontinence ◽

Event Related Potentials ◽

Anterior Cingulate ◽

Afferent Pathways ◽

Study Results ◽

Related Potentials ◽

The Central Nervous System ◽

Cortical Regions

Abstract. Objective: Fecal incontinence and constipation are common disorders in childhood. The enteric nervous system and the central nervous system are highly interactive along the brain-gut axis. The interaction is mainly afferent. These afferent pathways include centers that are involved in the central nervous processing of emotions as the mid/posterior insula and the anterior cingulate cortex. A previous study revealed altered processing of emotions in children with fecal incontinence. The present study replicates these results. Methods: In order to analyze the processing of emotions, we compared the event-related potentials of 25 children with fecal incontinence and constipation to those of 15 control children during the presentation of positive, negative, and neutral pictures. Results: Children with fecal incontinence and constipation showed altered processing of emotions, especially in the parietal and central cortical regions. Conclusions: The main study results of the previous study were replicated, increasing the certainty and validity of the findings.

Download Full-text

EEG Measurement of Emotion Processing in Children with Daytime Urinary Incontinence

Zeitschrift für Kinder- und Jugendpsychiatrie und Psychotherapie ◽

10.1024/1422-4917/a000563 ◽

2018 ◽

Vol 46 (4) ◽

pp. 336-341

Author(s):

Justine Niemczyk ◽

Monika Equit ◽

Katja Rieck ◽

Mathias Rubly ◽

Catharina Wagner ◽

...

Keyword(s):

Urinary Incontinence ◽

Patient Group ◽

Imaging Techniques ◽

Emotion Processing ◽

Event Related Potentials ◽

Oddball Paradigm ◽

Control Group ◽

Central Processing ◽

Daytime Urinary Incontinence ◽

Related Potentials

Abstract. Objective: Daytime urinary incontinence (DUI) is common in childhood. The aim of the study was to neurophysiologically analyse the central emotion processing in children with DUI. Method: In 20 children with DUI (mean age 8.1 years, 55 % male) and 20 controls (mean age 9.1 years, 75 % male) visual event-related potentials (ERPs) were recorded after presenting emotionally valent (80 neutral, 40 positive, and 40 negative) pictures from the International Affective Picture System (IAPS) as an oddball-paradigm. All children received a full organic and psychiatric assessment. Results: Children with DUI did not differ significantly from controls regarding responses to emotional pictures in the frontal, central, and parietal regions and in the time intervals 250–450 ms, 450–650 ms, and 650–850 ms after stimulus onset. The patient group had more psychological symptoms and psychiatric comorbidities than the control group. Conclusions: EEG responses to emotional stimuli are not altered in children with DUI. Central emotion processing does not play a major role in DUI. Further research, including a larger sample size, a more homogeneous patient group (regarding subtype of DUI) or brain imaging techniques, could reveal more about the central processing in DUI.

Download Full-text

Effects of Experimentally Induced Pain on Mismatch Negativity

Journal of Psychophysiology ◽

10.1027/0269-8803.20.1.21 ◽

2006 ◽

Vol 20 (1) ◽

pp. 21-31 ◽

Cited By ~ 6

Author(s):

Bruce D. Dick ◽

John F. Connolly ◽

Michael E. Houlihan ◽

Patrick J. McGrath ◽

G. Allen Finley ◽

...

Keyword(s):

Cognitive Processing ◽

Mismatch Negativity ◽

Event Related Potentials ◽

Disruptive Effect ◽

Ischemic Pain ◽

Active Attention ◽

Early Processing ◽

Related Potentials ◽

Healthy Participants ◽

Experimentally Induced

Abstract: Previous research has found that pain can exert a disruptive effect on cognitive processing. This experiment was conducted to extend previous research with participants with chronic pain. This report examines pain's effects on early processing of auditory stimulus differences using the Mismatch Negativity (MMN) in healthy participants while they experienced experimentally induced pain. Event-related potentials (ERPs) were recorded using target and standard tones whose pitch differences were easy- or difficult-to-detect in conditions where participants attended to (active attention) or ignored (passive attention) the stimuli. Both attention manipulations were conducted in no pain and pain conditions. Experimentally induced ischemic pain did not disrupt the MMN. However, MMN amplitudes were larger to difficult-to-detect deviant tones during painful stimulation when they were attended than when they were ignored. Also, MMN amplitudes were larger to the difficult- than to the easy-to-detect tones in the active attention condition regardless of pain condition. It appears that rather than exerting a disruptive effect, the presence of experimentally induced pain enhanced early processing of small stimulus differences in these healthy participants.

Download Full-text

Selective Attention and Error Processing in an Illusory Conjunction Task

Journal of Psychophysiology ◽

10.1027/0269-8803.19.3.216 ◽

2005 ◽

Vol 19 (3) ◽

pp. 216-231 ◽

Cited By ~ 8

Author(s):

Albertus A. Wijers ◽

Maarten A.S. Boksem

Keyword(s):

Target Detection ◽

Event Related Potentials ◽

Illusory Conjunction ◽

Conjunction Error ◽

Error Related Negativity ◽

Display Element ◽

Related Potentials ◽

Feature Error ◽

High Level ◽

Correct Target

Abstract. We recorded event-related potentials in an illusory conjunction task, in which subjects were cued on each trial to search for a particular colored letter in a subsequently presented test array, consisting of three different letters in three different colors. In a proportion of trials the target letter was present and in other trials none of the relevant features were present. In still other trials one of the features (color or letter identity) were present or both features were present but not combined in the same display element. When relevant features were present this resulted in an early posterior selection negativity (SN) and a frontal selection positivity (FSP). When a target was presented, this resulted in a FSP that was enhanced after 250 ms as compared to when both relevant features were present but not combined in the same display element. This suggests that this effect reflects an extra process of attending to both features bound to the same object. There were no differences between the ERPs in feature error and conjunction error trials, contrary to the idea that these two types of errors are due to different (perceptual and attentional) mechanisms. The P300 in conjunction error trials was much reduced relative to the P300 in correct target detection trials. A similar, error-related negativity-like component was visible in the response-locked averages in correct target detection trials, in feature error trials, and in conjunction error trials. Dipole modeling of this component resulted in a source in a deep medial-frontal location. These results suggested that this type of task induces a high level of response conflict, in which decision-related processes may play a major role.

Download Full-text