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A neuromechanical simulation of insect walking and transition to turning of the cockroach Blaberus discoidalis

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Abstract

A neuromechanical simulation of the cockroach Blaberus discoidalis was developed to explore changes in locomotion when the animal transitions from walking straight to turning. The simulation was based upon the biological data taken from three sources. Neural circuitry was adapted from the extensive literature primarily obtained from the studies of neural connections within thoracic ganglia of stick insect and adapted to cockroach. The 3D joint kinematic data on straight, forward walking for cockroach were taken from a paper that describes these movements in all joints simultaneously as the cockroach walked on an oiled-plate tether (Bender et al. in PloS one 5(10):1–15, 2010b). Joint kinematics for turning were only available for some leg joints (Mu and Ritzmann in J Comp Physiol A Neuroethol Sens Neural Behav Physiol 191(11):1037–54, 2005) and thus had to be obtained using the methods that were applied for straight walking by Bender et al. (PloS one 5(10):1–15, 2010b). Once walking, inside turning, and outside turning were characterized, phase and amplitude changes for each joint of each leg were quantified. Apparent reflex reversals and joint activity changes were used to modify sensory coupling pathways between the CPG at each joint of the simulation. Oiled-plate experiments in simulation produced tarsus trajectories in stance similar to those seen in the animal. Simulations including forces that would be experienced if the insect was walking freely (i.e., weight support and friction) again produced similar results. These data were not considered during the design of the simulation, suggesting that the simulation captures some key underlying the principles of walking, turning, and transitioning in the cockroach. In addition, since the nervous system was modeled with realistic neuron models, biologically plausible reflex reversals are simulated, motivating future neurobiological research.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, Case Western Reserve University, 10900 Euclid Ave., Cleveland, Ohio, 44106, USA

    Nicholas S. Szczecinski & Roger D. Quinn

  2. Department of Biology, Case Western Reserve University, 10900 Euclid Ave, Cleveland, Ohio, 44106, USA

    Amy E. Brown, John A. Bender & Roy E. Ritzmann

Authors
  1. Nicholas S. Szczecinski
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  2. Amy E. Brown
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  3. John A. Bender
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  4. Roger D. Quinn
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  5. Roy E. Ritzmann
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Correspondence to Nicholas S. Szczecinski.

Additional information

This work was supported by a NASA Office of the Chief Technologists Space Technology Research Fellowship (Grant Number NNX12AN24H). Further funding was provided by AFOSR Grant FA9550-10-1-0054.

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Szczecinski, N.S., Brown, A.E., Bender, J.A. et al. A neuromechanical simulation of insect walking and transition to turning of the cockroach Blaberus discoidalis . Biol Cybern 108, 1–21 (2014). https://doi.org/10.1007/s00422-013-0573-3

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  • DOI: https://doi.org/10.1007/s00422-013-0573-3

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