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Bilateral symmetric organization of neural elements in the visual system of a coelenterate, Tripedalia cystophora (Cubozoa)

Parkefelt, Linda LU ; Skogh, Charlotta; Nilsson, Dan-E LU and Ekström, Peter LU (2005) In Journal of Comparative Neurology 492(3). p.251-262
Abstract
Cubozoans differ from other cnidarians by their body architecture and nervous system structure. In the medusa stage they possess the most advanced visual system within the phylum, located in sophisticated sensory structures, rhopalia. The rhopalium is a club-shaped structure with paired pit-shaped pigment cup eyes, paired slit-shaped pigment cup eyes, and two complex camera-type eyes: one small upper lens eye and one large lower lens eye. The medusa carries four rhopalia and visual processing and locomotor rhythm generation takes place in the rhopalia. We show here a bilaterally symmetric organization of neurons, with commissures connecting the two sides, in the rhopalium of the cubozoan Tripedalia cystophora. The fortuitous observation... (More)
Cubozoans differ from other cnidarians by their body architecture and nervous system structure. In the medusa stage they possess the most advanced visual system within the phylum, located in sophisticated sensory structures, rhopalia. The rhopalium is a club-shaped structure with paired pit-shaped pigment cup eyes, paired slit-shaped pigment cup eyes, and two complex camera-type eyes: one small upper lens eye and one large lower lens eye. The medusa carries four rhopalia and visual processing and locomotor rhythm generation takes place in the rhopalia. We show here a bilaterally symmetric organization of neurons, with commissures connecting the two sides, in the rhopalium of the cubozoan Tripedalia cystophora. The fortuitous observation that a subset of neurons is strongly immunoreactive for a PCNA (proliferating cell nuclear antigen)-like epitope allowed us to analyze the organization of these neurons in detail. Distinct PCNA-immunoreactive (PCNA-ir) nuclei form six bilateral pairs that are associated with the slit eyes, pit eyes, upper lens eye, and the posterior wall of the rhopalium. Three commissures connect the clusters of the two sides and all clusters in the rhopalium have connections to the area around the base of the stalk. This neuronal system provides an anatomical substrate for integration of visual signals from the different eyes. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
eyes, nervous system, photoreceptors, cnidaria
in
Journal of Comparative Neurology
volume
492
issue
3
pages
251 - 262
publisher
John Wiley & Sons
external identifiers
  • pmid:16217792
  • wos:000233128200001
  • scopus:27544463011
ISSN
1096-9861
DOI
10.1002/cne.20658
language
English
LU publication?
yes
id
55b2321e-1e60-4d05-9ba3-ecddb39b1f07 (old id 213865)
date added to LUP
2007-08-06 16:45:05
date last changed
2017-07-30 03:42:36
@article{55b2321e-1e60-4d05-9ba3-ecddb39b1f07,
  abstract     = {Cubozoans differ from other cnidarians by their body architecture and nervous system structure. In the medusa stage they possess the most advanced visual system within the phylum, located in sophisticated sensory structures, rhopalia. The rhopalium is a club-shaped structure with paired pit-shaped pigment cup eyes, paired slit-shaped pigment cup eyes, and two complex camera-type eyes: one small upper lens eye and one large lower lens eye. The medusa carries four rhopalia and visual processing and locomotor rhythm generation takes place in the rhopalia. We show here a bilaterally symmetric organization of neurons, with commissures connecting the two sides, in the rhopalium of the cubozoan Tripedalia cystophora. The fortuitous observation that a subset of neurons is strongly immunoreactive for a PCNA (proliferating cell nuclear antigen)-like epitope allowed us to analyze the organization of these neurons in detail. Distinct PCNA-immunoreactive (PCNA-ir) nuclei form six bilateral pairs that are associated with the slit eyes, pit eyes, upper lens eye, and the posterior wall of the rhopalium. Three commissures connect the clusters of the two sides and all clusters in the rhopalium have connections to the area around the base of the stalk. This neuronal system provides an anatomical substrate for integration of visual signals from the different eyes.},
  author       = {Parkefelt, Linda and Skogh, Charlotta and Nilsson, Dan-E and Ekström, Peter},
  issn         = {1096-9861},
  keyword      = {eyes,nervous system,photoreceptors,cnidaria},
  language     = {eng},
  number       = {3},
  pages        = {251--262},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Comparative Neurology},
  title        = {Bilateral symmetric organization of neural elements in the visual system of a coelenterate, Tripedalia cystophora (Cubozoa)},
  url          = {http://dx.doi.org/10.1002/cne.20658},
  volume       = {492},
  year         = {2005},
}