Rapid escape reflexes in aquatic oligochaetes: variations in design and function of evolutionarily conserved giant fiber systems

This study provides neuroanatomical and electrophysiological evidence that an arrangement of three dorsal giant fibers, functioning as two distinct and dichotomous conduction pathways, has been evolutionarily conserved within the three major orders of aquatic and terrestrial oligochaetes. The author...

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Bibliographic Details
Published in:Journal of Comparative Physiology A 1987-01, Vol.161 (5), p.729-738
Main Authors: ZORAN, M. J, DREWES, C. D
Format: Article
Language:English
Subjects:
Annelida and closely related phyla: sipuncula. Echiura. Nemertinea
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
Invertebrates
Oligochaeta
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Summary:This study provides neuroanatomical and electrophysiological evidence that an arrangement of three dorsal giant fibers, functioning as two distinct and dichotomous conduction pathways, has been evolutionarily conserved within the three major orders of aquatic and terrestrial oligochaetes. The authors hypothesize that differential predation pressures, together with fundamental differences in lifestyle and habitat, have led to divergence in the structure and function of evolutionarily conserved set of homologous giant interneurons.
ISSN:0340-7594
1432-1351
DOI:10.1007/BF00605014