An optical telemetry system for underwater recording of electromyogram and neuronal activity from non-tethered crayfish

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概要

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• 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.

• Elsevier B.V.の論文
• 2004-08-15

著者

• Takahata M

  Division Of Biological Sciences Graduate School Of Science Hokkaido University

• Takahata Masakazu

  Division Of Biological Sciences Graduate School Of Sciences Hokkaido University

関連論文

• PHYSIOLOGICAL AND MORPHOLOGICAL CHARACTERIZATION OF UROPOD MOTONEURONS IN CRAYFISH(Physiology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
• Further exploration into the adaptive design of the arthropod "microbrain" : I. Sensory and memory-processing systems
• An optical telemetry system for underwater recording of electromyogram and neuronal activity from non-tethered crayfish
• UNDERWATER RECORDING OF ELECTROMYOGRAM AND NEURONAL ACTIVITY FROM NON-TETHERED CRAYFISH USING OPTICAL TELEMETRY DEVICE(Physiology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
• Exploration into the Adaptive Design of the Arthropod "Microbrain"
• Terminal Projection of Descending Interneurones Controlling Uropod Movements of the Crayfish Procambarus clarkii Girard
• COMPUTATIONAL ANALYSIS OF THE SYNAPTIC INTEGRATION IN A NONSPIKING INTERNEURON OF CRAYFISH(Physiology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
• IDENTIFICATION OF PRE-NGI INTERNEURONS IN CENTRAL COMPENSATION OF EYESTALK POSTURE OF CRAYFISH(Physiology,Abstracts of papers presented at the 74^ Annual Meeting of the Zoological Society of Japan)
• Local Non-spiking Interneurons in the Arthropod Motor Control Systems : Characterization and Their Functional Significance
• Variability and Invariability in the Structure of an Identified Nonspiking Interneuron of Crayfish as Revealed by Three-Dimensional Morphometry

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