12 documents found, page 1 of 2
The influence of bromazepam on cortical power distribution
Sampaio,Isabel; Puga,Fernanda; Veiga,Heloisa; Cagy,Mauricio; Piedade,Roberto; Ribeiro,PedroThe EEG has been widely employed in the assessment of electrophysiological changes induced by distinct medications. Its sensibility in detecting alterations produced by a specific substance may be enhanced by methods of quantitative analyses (qEEG). The present study aimed at investigating the modulatory effects of bromazepam on brain dynamics. The effects of bromazepam (3mg) on EEG power distribution were test...
Influence of bromazepam on cortical interhemispheric coherence
Sampaio,Isabel; Puga,Fernanda; Veiga,Heloisa; Cagy,Maurício; Piedade,Roberto; Ribeiro,PedroBenzodiazepines are among the most commonly prescribed medications due to their therapeutic efficacy in reducing anxiety and inducing sleep. Consequently, they have been widely employed in the pharmacological treatment of several disorders. Nevertheless, few studies have analyzed the effects of bromazepam in electroencephalographic activity (EEG). The present study aimed at investigating the modulatory effects ...
Os efeitos da estimulação elétrica funcional na assimetria cortical inter-hemis...
Ecard,Letícia; Silva,Andressa Pitanga S. da; Peçanha Neto,Marijose; Veiga,Heloisa; Cagy,Maurício; Piedade,Roberto; Ribeiro,PedroO objetivo do presente estudo foi avaliar os efeitos da estimulação elétrica funcional na assimetria cortical inter-hemisférica. Para tal, simultaneamente ao registro da atividade eletroencefalográfica, realizou-se eletroestimulação no antebraço direito para estimulação da extensão do indicador. A amostra consistiu de 45 sujeitos randomizados em 3 grupos de 15 sujeitos cada: grupo controle (submetido a 24 bloco...
The effects of bromazepam on the early stage of visual information processing (...
Puga,Fernanda; Sampaio,Isabel; Veiga,Heloisa; Ferreira,Camila; Cagy,Maurício; Piedade,Roberto; Ribeiro,PedroThe early stages of visual information processing, involving the detection and perception of simple visual stimuli, have been demonstrated to be sensitive to psychotropic agents. The present study investigated the effects of an acute dose of bromazepam (3 mg), compared with placebo, on the P100 component of the visual evoked potential and reaction time. The sample, consisting of 14 healthy subjects (6 male and ...
Analysis of the influence of bromazepam on cognitive performance through the vi...
Puga,Fernanda; Veiga,Heloisa; Cagy,Maurício; McDowell,Kaleb; Piedade,Roberto; Ribeiro,PedroBenzodiazepines 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, ...
Neuromodulatory effects of caffeine and bromazepam on visual event-related pote...
Montenegro,Mariana; Veiga,Heloisa; Deslandes,Andréa; Cagy,Maurício; McDowell,Kaleb; Pompeu,Fernando; Piedade,Roberto; Ribeiro,PedroThe P300 component of the event-related potential (ERP) is a general measurement of "cognitive efficiency". It is an index of the ability of an individual's central nervous system (CNS) to process incoming information. OBJECTIVE: To compare the neuromodulatory effects of caffeine and bromazepam on the visual ERP (P300), in relation to a P300 normative database. METHOD: 15 right-handed individuals (7 male and 8 ...
Quantitative electroencephalography (qEEG) to discriminate primary degenerative...
Deslandes,Andréa; Veiga,Heloisa; Cagy,Mauricio; Fiszman,Adriana; Piedade,Roberto; Ribeiro,PedroElectroencephalography (EEG) can be a valuable technique to assess electrophysiological changes related to dementia. In patients suspected of having dementia, the EEG is often quite informative. The sensitivity of the EEG to detect correlates of psychiatric disorders has been enhanced by means of quantitative methods of analysis (quantitative EEG). Quantitative features are extracted from, at least, 2 minutes o...
Effects of caffeine on visual evoked potencial (P300) and neuromotor performance
Deslandes,Andréa Camaz; Veiga,Heloisa; Cagy,Maurício; Piedade,Roberto; Pompeu,Fernando; Ribeiro,PedroThe stimulant effects of caffeine on cognitive performance have been widely investigated. The visual evoked potential, specially the P300 component, has been used in studies that explain the stimulant mechanisms of caffeine through neurophysiological methods. In this context, the present study aimed to investigate electrophysiological changes (P300 latency) and modification of cognitive and motor performance pr...
Visual event-related potencial (P300): a normative study
Veiga,Heloisa; Deslandes,Andréa; Cagy,Maurício; McDowell,Kaleb; Pompeu,Fernando; Piedade,Roberto; Ribeiro,PedroThe P300 component of the Event-Related Potential (ERP) is a general measurement of "cognitive efficiency". It is an index of the ability of an individual's Central Nervous System (CNS) to process incoming information. OBJECTIVE: To develop a normative database for the visual P300. METHODOLOGY: 30 right-handed individuals (same number of each sex), between 20 and 30 years of age, healthy, free of any cognitive ...
Alterações na distribuição de potência cortical em função da consolidação da me...
Cunha,Marlo; Bastos,Victor Hugo; Veiga,Heloisa; Cagy,Maurício; McDowell,Kaleb; Furtado,Vernon; Piedade,Roberto; Ribeiro,PedroO objetivo do presente estudo foi investigar alterações nos padrões eletroencefalográficos de sujeitos normais e destros durante o aprendizado de uma tarefa motora (datilografia). Estudos têm demonstrado que o córtex cerebral é susceptível a modificações durante a aprendizagem e que alterações nos padrões elétricos corticais ocorrem em função da aquisição de uma habilidade motora e da consolidação da memória. A...