Neurobiology of Polyorchis. I. Function of effector systems.

  title={Neurobiology of Polyorchis. I. Function of effector systems.},
  author={Andrew N. Spencer},
  journal={Journal of neurobiology},
  volume={9 2},
The electrical correlates of activity in the effector systems responsible for swimming, crumpling and postural changes have been recorded in the anthomedusan Polyorchis penicillatus. Motor spikes (pre-swim pulses), that initiate swimming contractions, appear without delay at distant sites on the inner nerve-ring in unstimulated preparations. Levels of Mg++ anaesthesia which block the neuromuscular junctions between PSP giant neurons and swimming muscle do not affect PSP activity. Swimming… CONTINUE READING