PMID: 9447711Feb 3, 1998Paper

Leg kinematics and muscle activity during treadmill running in the cockroach, Blaberus discoidalis: II. Fast running

Journal of Comparative Physiology. A, Sensory, Neural, and Behavioral Physiology
J T Watson, Roy E Ritzmann

Abstract

We have combined kinematic and electromyogram (EMG) analysis of running Blaberus discoidalis to examine how middle and hind leg kinematics vary with running speed and how the fast depressor coxa (Df) and fast extensor tibia (FETi) motor neurons affect kinematic parameters. In the range 2.5-10 Hz, B. discoidalis increases step frequency by altering the joint velocity and by reducing the time required for the transition from flexion to extension. For both Df and FETi the timing of recruitment coincides with the maximal frequency seen for the respective slow motor neurons. Df is first recruited at the beginning of coxa-femur (CF) extension. FETi is recruited in the latter half of femur-tibia (FT) extension during stance. Single muscle potentials produced by these fast motor neurons do not have pronounced effects on joint angular velocity during running. The transition from CF flexion to extension was abbreviated in those cycles with a Df potential occurring during the transition. One effect of Df activity during running may be to phase shift the beginning of joint extension so that the transition is sharpened. FETi is associated with greater FT extension at higher running speeds and may be necessary to overcome high joint torques ...Continue Reading

Citations

Oct 11, 2007·Biological cybernetics·Raghavendra P Kukillaya, Philip J Holmes
Jan 23, 1999·Current Opinion in Neurobiology·R D BeerR E Ritzmann
Apr 20, 2011·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Simon SponbergRobert J Full
Apr 20, 2011·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Simon SponbergRobert J Full
Dec 4, 2003·Annual Review of Entomology·Fred Delcomyn
Jun 19, 2009·Journal of Neurophysiology·Matthias GruhnAnke Borgmann
Dec 20, 2007·Arthropod Structure & Development·Roy E RitzmannMartin S Fischer
Feb 3, 2018·Bioinspiration & Biomimetics·Sean W Gart, Chen Li
Dec 21, 2007·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Laiyong Mu, Roy E Ritzmann
Nov 1, 2005·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Laiyong Mu, Roy E Ritzmann
Nov 23, 2007·Journal of Neurophysiology·Keri L PageThomas Matheson
Jun 20, 2020·Bioinspiration & Biomimetics·Clarissa GoldsmithRoger D Quinn
Feb 6, 2015·Journal of Neurophysiology·Joscha SchmitzAnsgar Büschges
Jul 11, 2020·The Journal of Experimental Biology·Ritwika MukherjeeBarry A Trimmer
Aug 15, 2019·Nature Communications·Izaak D NevelnSimon Sponberg
Sep 15, 2020·Bioinspiration & Biomimetics·C A GoldsmithR D Quinn
May 18, 2010·The Journal of Experimental Biology·Andrew J SpenceRobert J Full
Aug 26, 2009·Journal of Theoretical Biology·J Schmitt, S Bonnono

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