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Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement
Published on: June 25, 2016
A novel telemetry system for recording EEG in small animals
Pishan Chang1, Kevan S Hashemi, Matthew C Walker
1Department of Clinical and Experimental Epilepsy, UCL Institute of Neurology, University College London, London WC1N 3BG, UK.
Journal of Neuroscience Methods
|August 9, 2011
Summary
This study introduces a novel implantable sensor for continuous electroencephalography (EEG) monitoring in freely moving animals. The system enables weeks of high-frequency EEG data collection, crucial for epilepsy research and drug efficacy studies.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Animal Research
Background:
- Continuous electroencephalography (EEG) monitoring is vital for studying epilepsy development and drug effects in animal models.
- Existing telemetric systems face challenges in continuously monitoring high-frequency EEG (above 80Hz) for extended periods.
Purpose of the Study:
- To present an implantable telemetric sensor for long-term, high-frequency EEG monitoring in freely moving animals.
- To address power consumption and data acquisition challenges in animal EEG studies.
Main Methods:
- Development of a 2.4-ml implantable telemetric sensor capable of monitoring EEG at 512 samples/sec for eight weeks.
- Utilized burst transmission of 915-MHz radio power and novel techniques to reduce power consumption significantly.
- Implemented open-source circuit diagrams and internet-based data acquisition software for multi-platform compatibility.
Main Results:
- The sensor achieves continuous EEG monitoring for up to eight weeks in freely moving animals.
- Achieved a signal with a dynamic range of 9mV, bandwidth of 160Hz, input noise of 12μV, and minimal AC power interference (<1μV).
- Enabled simultaneous monitoring of 8 transmitters with reduced power consumption by two orders of magnitude.
Conclusions:
- The developed system provides a reliable platform for long-term, continuous EEG monitoring in animal models.
- Facilitates robust data collection for advancing epilepsy research and evaluating anti-epileptic drug efficacy.
- Open-source design promotes accessibility and further development in neurophysiological monitoring.
