Frequency analysis of electroencephalogram recorded from a bottlenose dolphin (Tursiops truncatus) with a novel method during transportation by truck

In order to obtain information regarding the correlation between an electroencephalogram (EEG) and the state of a dolphin, we developed a noninvasive recording method of EEG of a bottlenose dolphin (Tursiops truncatus) and an extraction method of true-EEG (EEG) from recorded-EEG (R-EEG) based on a h...

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Bibliographic Details
Published in:The journal of physiological sciences 2010-07, Vol.60 (4), p.235-244
Main Authors: Hashio, Fuyuko, Tamura, Shinichi, Okada, Yasunori, Morimoto, Shigeru, Ohta, Mitsuaki, Uchida, Naoyuki
Format: Article
Language:English
Subjects:
Animals
Bottle-Nosed Dolphin - physiology
Electroencephalography - methods
Electroencephalography - veterinary
Female
Motor Vehicles
Original Paper
Transportation
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Summary:In order to obtain information regarding the correlation between an electroencephalogram (EEG) and the state of a dolphin, we developed a noninvasive recording method of EEG of a bottlenose dolphin (Tursiops truncatus) and an extraction method of true-EEG (EEG) from recorded-EEG (R-EEG) based on a human EEG recording method, and then carried out frequency analysis during transportation by truck. The frequency detected in the EEG of dolphin during apparent awakening was divided conveniently into three bands (5-15, 15-25, and 25-40 Hz) based on spectrum profiles. Analyses of the relationship between power ratio and movement of the dolphin revealed that the power ratio of dolphin in a situation when it was being quiet was evenly distributed among the three bands. These results suggested that the EEG of a dolphin could be detected accurately by this method, and that the frequency analysis of the detected EEG seemed to provide useful information for understanding the central nerve activity of these animals.
ISSN:1880-6546
1880-6562
DOI:10.1007/s12576-010-0090-2