ABSTRACT
ABSTRACT Objective To determine the prevalence of obstructive sleep apnea (OSA) in children with attention deficit/hyperactive disorder (ADHD) and compare amplitude and latency of the P300 potential among children with and without OSA. Method Sixty-one children with ADHD underwent oddball auditory attention tests for detection of P300 (ERPs) followed by an all-night polysomnography. The children were divided in two groups, those with and without OSA. Results Significant decreased amplitude of the P300 potential was observed in children with OSA when compared with children without OSA. Conclusion The study showed that sleep fragmentation as a result of OSA can exacerbate the attention disorder that characterizes ADHD, and highlights the importance of assessing the presence of OSA in the differential diagnosis of children with attention deficits.
RESUMO Objetivo determinar a prevalência de apneia obstrutiva do sono (AOS) em crianças com déficit de atenção / hiperatividade (TDAH) e comparar amplitude e latência do potencial P300 entre as crianças com e sem AOS. Método Sessenta e uma crianças com TDAH foram submetidos a testes de atenção auditiva com o paradigma oddball para a detecção de potenciais relacionados a eventos (PREs) do tipo P300, seguidos por polissonografia de noite inteira. As crianças foram divididas em dois grupos, crianças com e sem AOS. Resultados Foi observada redução significativa da amplitude do potencial P300 em crianças com AOS quando comparadas com crianças sem AOS. Conclusão O estudo mostrou que a fragmentação do sono, consequente a AOS, pode exacerbar o déficit de atenção, que caracteriza o TDAH, e destacou a importância de avaliar a presença de AOS no diagnóstico diferencial de crianças com déficit de atenção.
Subject(s)
Humans , Male , Female , Child , Adolescent , Attention Deficit Disorder with Hyperactivity/physiopathology , Attention Deficit Disorder with Hyperactivity/epidemiology , Sleep Wake Disorders/physiopathology , Sleep Wake Disorders/epidemiology , Event-Related Potentials, P300/physiology , Reference Values , Time Factors , Brazil/epidemiology , Sex Factors , Prevalence , Risk Factors , Analysis of Variance , Polysomnography , Statistics, NonparametricABSTRACT
Objective To built up the ERP model,measure mode and P300 potential reference standard in mice with vascular dementia(VD),and characterize the P300 potential in mice with VD.Methods Fortyeight mice were randomly divided into a normal group.sham operation group and a VD group.The mice in the Vd group were subject to repetitive ischemia and reperfusion by using the ligation of bilateral common carotid arteries so as to establish the VD model.The behavioral abnormalities were investigated by step-down test and water maze test.The N2 and P3 components of P300 potentials were also recorded.Results It was shown that the learning and memory abilities as reflected by the step down test and water maze test scores were decrease in mice in the VD group when compared with those in the normal group and sham operation group(P<0.05).The N2 and P3 latencies significantly prolonged(P<0.01)and P3 amplitudes decreased(P<0.05)in VD group as well.Conclusions In VD mice,there is a significant prolongation of the P300 potential latency and a significant decrease of learning and memory abilities.Recordings of P300 from unanesthetized mice could be an objective,non-invasive,quantitative and valuable electrophysiological method for studying the cognitive function of VD mice.
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Objective To evaluate cognitive function of chronic alcoholism patients.Methods The Wechsler Adult Intelligence Scale-Revise in China(WAIS-RC) and WMS-RC,including intelligence quotient,logical Memory.visual memory and stroop test,were investigated and P300 component of auditory event-related potential (ERP,P300),especially the subcomponents P3a and P3b were examined in 100 chronic alcoholism patients,and 70 healthv people matched in age,sex and educational level as controls.Results Compared with controls,the score of Verbal intelligence quotient(VIQ),Performance intelligence quotient (PIQ),Full-scale intelligence quotient (FIQ),logical memory,visual memory (immediate and delayed),and stroop test were significant lower (P <0.05.P＜O.01)in chronic alcoholism patients,but the latencies of P3a and P3b wave were significantly prolonged.the amplitude of P3a and P3b wave were significantly decreased in chronic alcoholism patients.Conclusion Chronic alcoholism patients have cognitive function impairment,and P300 is a more sensitive to discover the impairment of the cognitive function.