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Implanted electrode recordings from a praying mantis auditory interneuron during flying bat attacks.

Jeffrey D Triblehorn1, David D Yager

  • 1Department of Psychology, University of Maryland, College Park, MD 20742-4411, USA. jtriblehorn@psyc.umd.edu

The Journal of Experimental Biology
|February 21, 2002
PubMed
Summary

Mantis interneuron 501-T3 stops responding to bat calls during close-range attacks. This neural shutdown, triggered by specific sound patterns, may protect the mantis and allow for last-chance escape maneuvers.

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Area of Science:

  • Neuroethology
  • Sensory processing in insects
  • Predator-prey interactions

Background:

  • Mantis interneuron 501-T3 is known to be sensitive to ultrasound.
  • Bat echolocation calls are crucial for hunting and pose a threat to mantises.

Purpose of the Study:

  • To investigate the response of mantis interneuron 501-T3 to simulated bat attacks.
  • To understand the neural mechanisms underlying mantis evasion behavior.

Main Methods:

  • Recording neural activity from interneuron 501-T3 using implanted electrodes in mantises.
  • Simulating flying bat attacks with controlled ultrasound vocalizations in a flight room.

Main Results:

  • Interneuron 501-T3 exhibits multi-spike bursts at low pulse repetition rates (PRRs) below 55 pulses/s.

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  • Burst activity ceases as PRR increases and pulse durations decrease below 3 ms, preceding bat contact.
  • Cessation of activity is consistent with mantis dive response timing and may be intensity-dependent.

    • Conclusions:

    • The cessation of 501-T3 activity during terminal bat attack phases is likely due to increasing PRR and decreasing pulse duration.
    • This neural shutdown might protect the interneuron from habituation, facilitating escape responses.
    • The findings suggest that 501-T3's silence may enable other neural systems to mediate a 'last-chance' evasive response.