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Noninvasive method to assess the electrical brain activity from rats Ciência Rural
Ferrari,Rosana; Arce,Aldo Ivan Cespedes; Melo,Mariza Pires de; Costa,Ernane Jose Xavier.
This research presents a noninvasive method for the acquisition of brain electrical signal in rat. Was used an electroencephalography (EEG) system developed for bovine and adapted to rats. The bipolar electrode system (needle electrodes) was glued on the surface of the head of the animal without surgical procedures and the other electrode was glued to the tail, as ground. The EEG activity was sampled at 120Hz for an hour. The accuracy and precision of the EEG measurement was performed using Fourier analysis and signal energy. For this, the digital signal was divided into sections successive of 3 seconds and was decomposed into four frequency bands: delta (0.3 to 4Hz), theta (4-8Hz), alpha (8-12Hz) and beta (12-30Hz) and energy (µV²) of the series of time...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biological signals; Digital signal processing; Central nervous system; EEG.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001000017
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