Journal of comparative physiology

, Volume 141, Issue 1, pp 101–109 | Cite as

Complex mechanoreceptors inTritonia diomedea

I. Responses to mechanical and chemical stimuli
  • Gerald Audesirk
  • Teresa Audesirk
Article

Summary

  1. 1.

    A cluster of small neurons located in each cerebral ganglion ofTritonia diomedea responds to mechanical and chemical stimulation of receptive areas of the ipsilateral oral veil and anterior foot (Figs. 2, 3).

     
  2. 2.

    These neurons respond to several types of chemical stimuli, but appear to be excited most strongly by extracts of sea whip,Virgularia sp. (Fig. 3, Table 1), a normal prey ofTritonia.

     
  3. 3.

    These neurons appear to be primary mechano-receptors with receptive endings in the ipsilateral foot (accessed via PdN 1) and oral veil (accessed via both CeN 2 and CeN 3; Fig. 4). Receptive fields of different branches of the same receptor (Fig. 4) and of different receptors (Fig. 5) overlap in the oral veil.

     
  4. 4.

    The mechanoreceptors are not primary chemoreceptors but receive excitation via chemical synapses from chemoreceptors located in the periphery (Fig. 6). At least some of this synaptic input is peripheral in origin.

     
  5. 5.

    Ipsilateral mechanoreceptors are electrically coupled to one another by non-rectifying electrical junctions (Fig. 7). No contralateral inputs or interactions between receptors were found.

     
  6. 6.

    A model is presented for the anatomy and wiring of these complex receptors (Fig. 8).

     

Keywords

Receptive Field Complex Receptor Synaptic Input Chemical Stimulus Chemical Stimulation 

Abbreviations

PdN

pedal nerve

CeN

cerebral nerve

RPdN

right pedal nerve

SW

sea water

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Copyright information

© Springer-Verlag 1980

Authors and Affiliations

  • Gerald Audesirk
    • 1
  • Teresa Audesirk
    • 1
  1. 1.Friday Harbor LaboratoriesUniversity of WashingtonFriday HarborUSA

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