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| Han,H.Y.; Gan,T.; Li,P.; Li,Z.J.; Guo,M.; Yao,S.M.. |
| Affective states influence subsequent attention allocation. We evaluated emotional negativity bias modulation by reappraisal in patients with generalized anxiety disorder (GAD) relative to normal controls. Event-related potential (ERP) recordings were obtained, and changes in P200 and P300 amplitudes in response to negative or neutral words were noted after decreasing negative emotion or establishing a neutral condition. We found that in GAD patients only, the mean P200 amplitude after negative word presentation was much higher than after the presentation of neutral words. In normal controls, after downregulation of negative emotion, the mean P300 amplitude in response to negative words was much lower than after neutral words, and this was significant in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reappraisal; Generalized anxiety disorder; Event-related potential; P200; P300. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000700576 |
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| LÓPEZ,JAVIER; LÓPEZ,VLADIMIR; ROJAS,DANIEL; CARRASCO,XIMENA; ROTHHAMMER,PAULA; GARCÍA,RICARDO; ROTHHAMMER,FRANCISCO; ABOITIZ,FRANCISCO. |
| Although there is extensive literature about the effects of stimulants on sustained attention tasks in attentional deficit/hyperactivity disorder (ADHD), little is known about the effect of these drugs on other attentional tasks involving different neural systems. In this study we measured the effect of stimulants on ADHD children, both in the electroencephalographic (EEG) activity during sustained attentional tasks and in psychometric performance during selective attentional tasks. These tasks are known to rely on different cortical networks. Our results in children medicated with 10 mg of d-amphetamine administered 60 min before the study indicate (i) a significant increase in amplitude but not latency of the P300 component of the event-related potential... |
| Tipo: Journal article |
Palavras-chave: Attentional deficit; EEG; Event-related potentials; Hyperactivity; Stroop; P300. |
| Ano: 2004 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000300010 |
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| Deslandes,A.C.; Veiga,H.; Cagy,M.; Piedade,R.; Pompeu,F.; Ribeiro,P.. |
| Caffeine is the most consumed psychoactive substance in the world. The effects of caffeine have been studied using cognitive and motor measures, quantitative electroencephalography (qEEG) and event-related potentials. However, these methods are not usually employed in combination, a fact that impairs the interpretation of the results. The objective of the present study was to analyze changes in electrophysiological, cognitive and motor variables with the ingestion of caffeine, and to relate central to peripheral responses. For this purpose we recorded event-related potentials and eyes-closed, resting EEG, applied the Stroop test, and measured reaction time. Fifteen volunteers took caffeine (400 mg) or placebo in a randomized, crossover, double-blind... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Quantitative electroencephalography; P300; Caffeine; Cognitive and motor measures; Psychostimulants. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700011 |
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