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Title
  • en An optical telemetry system for underwater recording of electromyogram and neuronal activity from non-tethered crayfish
Creator
    • en Tsuchida, Yoshikazu
    • en Hama, Noriyuki
Accessrights open access
Subject
  • Other en Underwater telemetry
  • Other en Optical telemetry
  • Other en Neuronal activity
  • Other en Muscle potential
  • Other en Crayfish
  • NDC 485
Description
  • Abstract en We have developed an optical telemetry system for recording electrical signals associated with muscle and neuronal activities from freely walking crayfish under water. The device was made from conventional electronic parts which are commercially available, utilizing infrared light (880 nm) for signal transmission. Two or four channels of biological signals were multiplexed, the voltage of each data point modulated to the duration of subcarrier pulses and further to the interval of narrower carrier pulses that directly drove the infrared light emission diode (IRLED) under water. The light-pulse modulated signals were received by photodiodes and demodulated to restore the original two or four channel signals. Electrical recordings using wired electrodes and conventional amplifiers revealed that the optically transmitted signals were consistent with the wire-transmitted ones. In order to test the performance of this system, we recorded electromyograms (EMGs) from the second and third walking legs on each side of crayfish together with the neuronal activity in the ventral nerve cord. The results confirmed our previous observation in tethered crayfish that the background tonus of leg muscles showed an increase preceding their rhythmic activation.
Publisher en Elsevier B.V.
Date
    Issued2004-08-15
Language
  • eng
Resource Type journal article
Version Type AM
Identifier HDL http://hdl.handle.net/2115/16955
Relation
  • URI http://www.sciencedirect.com/science/journal/01650270
  • isVersionOf DOI https://doi.org/10.1016/j.jneumeth.2004.02.013
  • PMID 15196832
Journal
    • PISSN 0165-0270
      • en Journal of Neuroscience Methods
      • Volume Number137 Issue Number1 Page Start103 Page End109
File
    • fulltext JNM137-1.pdf
    • 750.64 KB (application/pdf)
      • Issued2004-08-15
Oaidate 2023-07-26