title: A radio-telemetry system with a shape memory alloy microelectrode for neural recording of freely moving insects.
abstract: A radio frequency (RF) telemetry system with a shape memory alloy microelectrode was designed and fabricated. The total size and weight are 15 mm x 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 Mohms at 1 kHz. The telemeter was loaded on a cockroach and the neural activity during a free-walk was successfully measured through this telemetry system.
authors.affiliation: Center for International Research on MicroMechatronics, Institute of Industrial Science, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan. takeuchi@iis.u-tokyo.ac.jp
authors.forename: Shoji
authors.initials: S
authors.lastname: Takeuchi
authors.forename: Isao
authors.initials: I
authors.lastname: Shimoyama
mesh_terms: D000497:Alloys; D000818:Animals; D003058:Cockroaches / Q000502:physiology; D004576:Electromyography / Q000295:instrumentation* / Q000379:methods; D004581:Electronics / Q000295:instrumentation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D007313:Insecta / Q000502:physiology*; D008124:Locomotion / Q000502:physiology; D008839:Microelectrodes; D008904:Miniaturization / Q000379:methods; D018670:Monitoring, Ambulatory / Q000295:instrumentation* / Q000379:methods; D009474:Neurons / Q000502:physiology*; D013686:Telemetry / Q000295:instrumentation* / Q000379:methods
chemical_list: D000497:Alloys