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On the ‘Visceral Nervous System’ of Ciona

Published online by Cambridge University Press:  11 May 2009

G.O. Mackie
G.O. Mackie
Affiliation:
Department Of Biology, University Of Victoria, Victoria, British Columbia, V8W 2Y2, Canada
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Extract

Ciona intestinalis has a well developed nerve plexus associated with the dorsal strand, as first described by Marco Fedele. The dorsal strand plexus is immunoreactive with antisera against gonadotropin-releasing hormone. Immunoreactivity is seen in the cell bodies, which lie peripherally, and in processes which run throughout the dorsal blood sinus, enter the branchial sac and penetrate the brain via the visceral nerve. The plexus provides a rich innervation of the gonoducts, and processes have been seen in the gonads. The pericardium is not innervated by processes from the plexus and the rectum is poorly innervated, but the full extent of the plexus in the viscera remains uncertain. While this study confirms many of Fedele's observations, it does not support the view that the dorsal strand plexus is equivalent to the vertebrate visceral nervous system.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 75 , Issue 1 , February 1995 , pp. 141 - 151
Copyright
Copyright © Marine Biological Association of the United Kingdom 1995

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