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Evidence for a cerebral cholinergic system and suggested pharmacological patterns of neural organization in the prostomium of the polychaete Nereis virens (SARS).

Authors
  • Marsden, J R
  • Bsata, N
  • Cain, H
Type
Published Article
Journal
Tissue and Cell
Publisher
Elsevier
Publication Date
Jan 01, 1981
Volume
13
Issue
2
Pages
255–267
Identifiers
PMID: 7314072
Source
Medline
License
Unknown

Abstract

The histological visualization of choline acetyltransferase (CAT) and acetylcholinesterase (AChE) on frozen sections of prostomia of Nereis virens indicate a concentration of cholinergic activity in the anterior brain. Components are probably sensory epithelial cells with cholinergic axons entering the brain in cephalic nerves and efferent cholinergic axons to prostomial muscle leaving the brain in the same nerves. There are also subepidermal cholinergic cells that may be second order motor neurons serving epidermal mucous cells. The smaller, second lobe of the corpora pedunculata and its associated vertical fibre tract are CAT(+) and appear continuous, on each side of the cerebral ganglion, with a dorsal and ventral longitudinal bundle of AChE(+) fibers. This system tapers to nothing at the level of the posterior eyes. There is a small AChE(+) component to each optic nerve and AChE is present in the nuchal epithelium. These observations are discussed in relation to earlier studies on aminergic and neurosecretory activity in the same ganglion.

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