Mathematics – Logic
Scientific paper
Mar 1967
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967natur.213.1042b&link_type=abstract
Nature, Volume 213, Issue 5080, pp. 1042-1043 (1967).
Mathematics
Logic
Scientific paper
IN view of the amount of information available about the structure of the nervous system in cephalopod molluscs, there is surprisingly little known about their neurosecretory systems. The epistellar body, associated with the stellar ganglion, was thought to be a neurosecretory organ1, but it is now known to have the structure of a photoreceptor2. Several other structures of unknown function have also been described that may have a neurosecretory function3,4. The only organ that has been shown to have an endocrine function in cephalopods is the optic gland of Octopus; behavioural studies show that it controls maturation of the gonads and hence sexual maturity5. A preliminary report on the fine structure of this organ gave little information of any granular content of the cells6. A group of possible neurosecretory tissues that have a similar histological structure have recently been, described-the vena caval tissue, associated with the vena cava in Eledone cirrosa, Octopus vulgaris and Sepia officinalis7,8, and the juxta-ganglionic tissue, associated with the inferior buccal ganglia and buccal sinus in Octopus vulgaris9,10. The juxta-ganglionic tissue, first described by Bogoraze and Cazal9, consists of a group of small nerve cells lying outside, but associated with, the inferior buccal ganglia (see ref. 10 for diagram of its position). These cells give rise to axons that pass down to the buccal sinus and end on its surface as a tangled mass of interweaving fibres10.
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