Design and Implementation of a Wireless In-Ovo EEG/EMG Recorder

The developmental origins of sleep and brain activity rhythms in higher vertebrate animals (birds and mammals) are currently unknown. In order to create an experimental system in which these could be better elucidated, we designed, built and tested a system for recording EEG and EMG signals in-ovo f...

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Bibliographic Details
Published in:IEEE transactions on biomedical circuits and systems 2013-12, Vol.7 (6), p.832-840
Main Authors: Di Pascoli, Stefano, Puntin, Daniele, Pinciaroli, Alessandro, Balaban, Evan, Pompeiano, Maria
Format: Article
Language:English
Subjects:
Animals
Biomedical measurement
Brain modeling
Chick Embryo
Circuits
Digital
EEG
Electric batteries
Electrodes
Electrodes, Implanted
Electroencephalography
Electroencephalography - instrumentation
Electromyography
Electromyography - instrumentation
Embryo
Embryos
EMG
Equipment Design
Recording
Rhythm
Telemetry - instrumentation
Transmitters
Vertebrates
wireless
Wireless communication
Wireless Technology - instrumentation
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Summary:The developmental origins of sleep and brain activity rhythms in higher vertebrate animals (birds and mammals) are currently unknown. In order to create an experimental system in which these could be better elucidated, we designed, built and tested a system for recording EEG and EMG signals in-ovo from chicken embryos incubated for 16-21 days. This system can remain attached to the individual subject through the process of hatching and continue to be worn post-natally. Electrode wires surgically implanted on the head of the embryo are connected to a battery-operated ultraportable transmitter which can either be attached to the eggshell or worn on the back. The transmitter processes up to 6 channels of data with a maximum sampling frequency of 500 Hz and a resolution of 12 bits. The radio link uses a carrier frequency of 4 MHz, and has a maximum transfer rate of 500 kbit/s; receiving antennas compatible with both in-egg recordings and post-natal recordings from freely-moving birds were produced. A receiver connected with one USB port of a PC transmits the data for digital storage. This system is based on discrete, off-the-shelf components, can provide a few days of continuous operation with a single lithium coin battery, and has a noise floor level of 0.35 μV. The transmitter dimensions are 16 × 13 × 1.5 mm and the weight without the battery is 0.7 g. The microprocessor allows flexible operation modes not usually made available in other small multichannel acquisition systems implemented by means of ad hoc mixed signal chips.
ISSN:1932-4545
1940-9990
DOI:10.1109/TBCAS.2013.2251343