Properties of motor units of the frog iliofibularis muscle.

  title={Properties of motor units of the frog iliofibularis muscle.},
  author={Anthony R. Luff and Uwe Proske},
  journal={The American journal of physiology},
  volume={236 1},
The tension developed by single motor units of the iliofibularis muscle of the frog Litoria aurea was recorded in response to single-shock and repetitive stimulation of motor axons. The majority of units in each muscle, 13 on the average, were of the twitch type; an additional 4 units were slow or tonic. It appeared that slow units comprised a single homogeneous population, but two types of twitch units could be recognized: small fatigue-resistant units with long twitch times to peak (20--40 ms… CONTINUE READING