Effects of caffeine on the electrophysiological, cognitive and motor responses of the central nervous system
Deslandes AC, Veiga H, Cagy M, Piedade R, Pompeu F, Ribeiro P
Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas · 39 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
Quién lo pagó
- Financiación
- Financiación independiente
- Gobierno
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Universidad u hospital
- Universidade Federal do Rio de Janeiro
Según 2 financiadores declarados.
Publicación
- Publicado
- 2005-07-01 · Braz J Med Biol Res · vol. 38 · número 7 · págs. 1077–1086
- Editorial
- Associação Brasileira de Divulgação Científica
- Citado
- 65 citas · más que el 84% de estudios similares · 1.7× el promedio de su campo
- Referencias
- 39 trabajos
- Acceso
- Acceso abierto (revista) · CC-BY
- Áreas de investigación
- Coffee research and impacts · Sleep and Work-Related Fatigue · Neural dynamics and brain function
- Palabras clave
- caffeine, central nervous system, event-related potentials, P300 latency, alpha power, quantitative EEG, Stroop task, reaction time, cognitive performance, motor performance, stimulant effects, placebo-controlled
- MeSH
- central nervous system, humans, caffeine, central nervous system stimulants, electroencephalography, analysis of variance, cross-over studies, double-blind method, cognition, psychomotor performance, reaction time, electrophysiology, event-related potentials, p300, adult, female, male
6 autores
- Andréa Camaz Deslandes🇧🇷Universidade Federal do Rio de Janeiro
- Heloisa Veiga🇧🇷Universidade Federal do Rio de Janeiro
- Maurício Cagy🇧🇷Universidade Federal do Rio de Janeiro
- Roberto Airton Marques Piedade🇧🇷Universidade Federal do Rio de Janeiro
- Fernando A. M. S. Pompeu🇧🇷Universidade Federal do Rio de Janeiro
- Pedro F. M. Ribeiro🇧🇷Universidade Federal do Rio de Janeiro; Universidade Castelo Branco
Resumen
El texto original del estudio, en el idioma en que se publicó.
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 design. A significant reduction of alpha absolute power over the entire scalp and of P300 latency at the Fz electrode were observed after caffeine ingestion. These results are consistent with a stimulatory effect of caffeine, although there was no change in the attention (Stroop) test or in reaction time. The qEEG seems to be the most sensitive index of the changes produced by caffeine in the central nervous system since it proved to be capable of detecting changes that were not evident in the tests of cognitive or motor performance.
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