QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by PASZTOR, V. M. Articles by MACMILLAN, D. L. Search for Related Content PubMed Articles by PASZTOR, V. M. Articles by MACMILLAN, D. L.

Journal of Experimental Biology 152,485-504 (1990)
Published by Company of Biologists 1990

The Actions of Proctolin, Octopamine and Serotonin on Crustacean Proprioceptors Show Species and Neurone Specificity

VALERIE M. PASZTOR ¹ and DAVID L. MACMILLAN ²

¹ Biology Department, McGill University, 1205 Avenue Dr Penfield, Montreal, Quebec, Canada H3A 1B1
² Department of Zoology, University of Melbourne, Parkville, Victoria 3052, Australia

A comparative survey is presented of the responsiveness of crustacean mechanoreceptors to the neurohormones proctolin, octopamine and serotonin. Seven identifiable primary afferents were examined in the crayfish Cherax destructor and the lobster Homarus americanus: three from the oval organ (OO) of the second maxilla, two from the non-spiking stretch receptor (NSSR) of the swimmeret and two from the muscle receptor organ (MRO) of the abdomen. Proctolin modulation was observed in 10 of the 14 fibres tested and was invariably potentiating, resulting in enhanced receptor potential amplitudes and increased firing. Octopamine and serotonin each modulated 8 of the 14 fibres and their effects were excitatory or depressive depending upon the target fibre. In the latter case the receptor potentials became attenuated, often to subthreshold levels, with loss of spiking.

A comparison of results from Cherax with those of Homarus shows that there is species specificity in the responses of homologous neurones. Neurohormones that are excitatory in one species may be ineffective or depressive in the other.

The broad distribution of modulatory effects observed here suggests that sensitivity to biogenic amines and peptides is a general property of proprioceptors.

Key words: neuromodulation, proctolin, octopamine, serotonin, mechanoreceptors, Crustacea

Accepted on May 14, 1990

This article has been cited by other articles:

				M. Wildt, E. M. Goergen, J. L. Benton, D. C. Sandeman, and B. S. Beltz Regulation of serotonin levels by multiple light-entrainable endogenous rhythms J. Exp. Biol., October 1, 2004; 207(21): 3765 - 3774. [Abstract] [Full Text] [PDF]

				J. T. Birmingham, C. P. Billimoria, T. R. DeKlotz, R. A. Stewart, and E. Marder Differential and History-Dependent Modulation of a Stretch Receptor in the Stomatogastric System of the Crab, Cancer borealis J Neurophysiol, December 1, 2003; 90(6): 3608 - 3616. [Abstract] [Full Text] [PDF]

				S. C. Rosen, M. W. Miller, E. C. Cropper, and I. Kupfermann Outputs of Radula Mechanoafferent Neurons in Aplysia are Modulated by Motor Neurons, Interneurons, and Sensory Neurons J Neurophysiol, March 1, 2000; 83(3): 1621 - 1636. [Abstract] [Full Text] [PDF]

				B. Mccarthy and D. Macmillan Control of abdominal extension in the freely moving intact crayfish cherax destructor. I. Activity Of the tonic stretch receptor J. Exp. Biol., January 1, 1999; 202(2): 171 - 181. [Abstract] [PDF]