Activation patterns and length changes in hindlimb muscles of the bullfrog Rana catesbeiana during jumping.

@article{Olson1998ActivationPA,
  title={Activation patterns and length changes in hindlimb muscles of the bullfrog Rana catesbeiana during jumping.},
  author={John P. Olson and Richard L. Marsh},
  journal={The Journal of experimental biology},
  year={1998},
  volume={201 Pt 19},
  pages={2763-77}
}
We measured the electromyographic (EMG) activity of seven hindlimb muscles during jumping in the bullfrog Rana catesbeiana. The semimembranosus, gracilis major, gluteus magnus, adductor magnus, cruralis and plantaris longus were consistently active approximately 20-40 ms before any perceptible movement, as indicated by simultaneous video recordings. Activity ended before full extension of the hindlimb and take-off. Activity in the semitendinosus was variable among the jumps recorded… CONTINUE READING

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