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A radio-telemetry system with a shape memory alloy microelectrode for neural recording of freely moving insects

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2 Author(s)
Takeuchi, S. ; Inst. of Ind. Sci., Univ. of Tokyo, Japan ; Shimoyama, I.

A radio frequency (RF) telemetry system with a shape memory alloy microelectrode was designed and fabricated. The total size and weight are 15 mm ×8 mm and 0.1 g, respectively. Since the telemeter is small and light enough to be loaded on a small animal such as an insect, the system can be used for the neural recording of a freely moving insect. The RF-telemeter can transmit signals by frequency modulation transmission at 80-90 MHz. The transmitted signals can be received up to about 16 meters away from the telemeter with a high signal-to-noise ratio. The neural activity can be detected without attenuation by using an instrumentation amplifier with its input impedance set to 2 MΩ at 1kHz. The telemeter was loaded on a cockroach and the neural activity during a free-walk was successfully measured through this telemetry system.

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Biomedical Engineering, IEEE Transactions on  (Volume:51 ,  Issue: 1 )