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

  title={Leg kinematics and muscle activity during treadmill running in the cockroach, Blaberus discoidalis: II. Fast running},
  author={J. T. Watson and Roy E. Ritzmann},
  journal={Journal of Comparative Physiology A},
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… Expand
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