The Rohde-like cells at the posterior end of the dorsal nerve cord of amphioxus (Cephalochordata).
Rohde neurons
Rohde‐like cells
SBSEM
lancelet
rhabdomeric photoreceptors
Journal
The Journal of comparative neurology
ISSN: 1096-9861
Titre abrégé: J Comp Neurol
Pays: United States
ID NLM: 0406041
Informations de publication
Date de publication:
Jun 2024
Jun 2024
Historique:
revised:
24
04
2024
received:
22
01
2024
accepted:
15
05
2024
medline:
9
6
2024
pubmed:
9
6
2024
entrez:
9
6
2024
Statut:
ppublish
Résumé
For postmetamorphic specimens of amphioxus (Cephalochordata), serial block-face scanning electron microscopy (SBSEM) is used to describe the long-ignored Rohde-like cells (RLCs) at the extreme posterior end of the dorsal nerve cord. These cells, numbering about three dozen in all, are divisible into a group with larger diameters running near the dorsal side of the cord and a more ventral group with smaller diameters closely associated with the central canal of the neurocoel. It is possible that the smaller ventral cells might be generated at the ependymal zone of the dorsal nerve cord and later migrate to a dorsal position, although a functional reason for this remains a mystery. All the RLCs have conspicuous regions of microvilli covering as much as 40% of their surface; limited data (by others) on the more anterior bona fide Rohde cells also indicate an extensive microvillar surface. Thus, both the RLCs and the better-known Rohde cells appear to be rhabdomeric photoreceptors, although a specific function for this feature is currently unknown. Even more perplexingly, although the Rohde cells are quintessential neurons extending giant processes, each RLC comprises a perikaryon that does not bear any neurites.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e25644Subventions
Organisme : National Science Foundation
ID : IOS 1952567
Informations de copyright
© 2024 The Author(s). The Journal of Comparative Neurology published by Wiley Periodicals LLC.
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