Análise do efeito Berger com eletroencefalograma portátil
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Data
2018-11-14
Autores
Oliveira, Luiz Miguel Alves de
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Em seus experimentos, Hans Berger percebeu que quando estamos de olhos
abertos, as ondas alfa diminuem em quantidade, amplitude e duração (efeito
Berger), o que foi bastante inesperado e o levou a questionar seus testes. A
tecnologia se desenvolveu muito durante o século XXI, permitindo a construção de
novos equipamentos de pesquisa, como é o caso do Emotiv Epoc+, um aparelho
portátil de eletroencefalografia. O objetivo deste trabalho foi analisar a ocorrência
do efeito Berger numa amostra de 60 universitários utilizando um aparelho portátil
de eletroencefalograma. Foram realizados testes com os indivíduos durante um
minuto de olhos abertos e um minuto de olhos fechados, este processo era repetido
10 vezes para cada voluntário. Os dados foram coletados com o Emotiv Epoc +,
que registra a atividade elétrica cerebral e envia os resultados em tempo real para
um computador. O método Matching Pursuit foi utilizado para extrair as informações
dos sinais e utilizando as linguagens de programação Python e R foram gerados
boxplots e realizados testes estatísticos para verificar a ocorrência do efeito Berger
nas amostras. Depois dos testes e da análise dos resultados, ficou comprovada a
ocorrência deste efeito
In his experiments, Hans Berger realized that when our eyes are opened the alpha waves decrease in quantity, amplitude and duration (Berger effect). This was a quite unexpected observation which led him to question his tests. The technology has developed a lot during the 21st century, allowing the construction of new research equipment, such as Emotiv Epoc +, a portable electroencephalography device. The objective of this study was to analyze the occurrence of the Berger effect in a sample of 60 university students using a portable electroencephalography device. Tests were performed with the subjects for one minute of opened eyes and one minute of closed eyes, this process was repeated 10 times for each volunteer. The data were collected with the Emotiv Epoc +, which records the brain electrical activity and sends the results to a computer in real time. The Matching Pursuit method was used to extract the information from the signals. Python and R programming languages were used to generate boxplots and to perform statistical tests to verify the occurrence of the Berger effect in the samples. The analysis of the results suggests that the Berger effect has indeed been observed in our samples
In his experiments, Hans Berger realized that when our eyes are opened the alpha waves decrease in quantity, amplitude and duration (Berger effect). This was a quite unexpected observation which led him to question his tests. The technology has developed a lot during the 21st century, allowing the construction of new research equipment, such as Emotiv Epoc +, a portable electroencephalography device. The objective of this study was to analyze the occurrence of the Berger effect in a sample of 60 university students using a portable electroencephalography device. Tests were performed with the subjects for one minute of opened eyes and one minute of closed eyes, this process was repeated 10 times for each volunteer. The data were collected with the Emotiv Epoc +, which records the brain electrical activity and sends the results to a computer in real time. The Matching Pursuit method was used to extract the information from the signals. Python and R programming languages were used to generate boxplots and to perform statistical tests to verify the occurrence of the Berger effect in the samples. The analysis of the results suggests that the Berger effect has indeed been observed in our samples
Descrição
Palavras-chave
Ondas Alfa, Emotiv Epoc+, Matching Pursuit, Alpha waves,