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A Wireless, Bidirectional Interface for In Vivo Recording and Stimulation of Neural Activity in Freely Behaving Rats
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A Software-Defined Radio Receiver for Wireless Recording From Freely Behaving Animals
IEEE Transactions on Biomedical Circuits and Systems
|October 25, 2019
Summary
This study introduces a wireless system for animal behavior experiments, eliminating tethering effects. The software-defined radio system ensures reliable neural data transmission, preventing blind spots and data loss.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Wireless Communication
Background:
- Tethering in electrophysiology experiments restricts small animal behavior.
- A robust wireless data link is crucial for neural interfacing without blind spots.
Purpose of the Study:
- To develop a scalable, software-defined radio (SDR) based data acquisition system.
- To eliminate tethering effects and ensure reliable wireless neural recording in freely behaving animals.
Main Methods:
- Utilized a software-defined radio (SDR) system for programmable arena coverage.
- Implemented real-time selection of the highest power RF signal to prevent data loss.
- Integrated a 32-channel wireless neural recording system-on-a-chip (WINeRS-8) transmitting at 9 Mbps via OOK on a 434 MHz carrier.
Main Results:
- The dual-SDR receiver system achieved an average packet loss of 0.12%.
- Blind spots caused by transmitter directionality were effectively eliminated.
- System performance was validated in vivo on a freely behaving rat, showing comparable results to hardwired systems.
Conclusions:
- The developed SDR-based wireless system successfully eliminates tethering artifacts in small animal electrophysiology.
- This technology enables robust, wideband wireless data transmission for neural interfacing.
- The system offers a viable alternative to traditional hardwired setups for behavioral neuroscience research.
