Journal of Comparative Physiology A

, Volume 171, Issue 3, pp 373–385 | Cite as

Water-flow sensitive pedal neurons in Tritonia: role in rheotaxis

  • James A. Murray
  • Randall S. Hewes
  • A. O. Dennis Willows


We have identified 13 pairs of neurons in the pedal ganglia of the marine nudibranch slug Tritonia diomedea that responded tonically and/or phasically to water-flow directed at the rhinophore sheaths and oral veil tips. Most of the neurons responded equally to inputs from either side of the body, but 6 pairs responded with greater intensity to ipsilateral water-flow stimuli. When stimulated intracellularly in a semi-intact, whole-animal preparation, 4 of these 6 pairs of neurons caused ipsilateral movements that may turn the animal towards that side. These observations suggest a role for these current-sensitive neurons in the previously described orientation to water-currents in Tritonia diomedea.

Key words

Tritonia Rheotaxis Pedal ganglion Orientation Mollusc 


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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • James A. Murray
    • 1
    • 2
  • Randall S. Hewes
    • 1
    • 2
  • A. O. Dennis Willows
    • 1
    • 2
  1. 1.Department of ZoologyUniversity of WashingtonSeattleUSA
  2. 2.Friday Harbor LaboratoriesFriday HarborUSA

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