Cell and Tissue Research

, Volume 250, Issue 1, pp 87–92 | Cite as

GABA-immunoreactive neurons in the photosensory pineal organ of the rainbow trout: two distinct neuronal populations

  • Peter Ekström
  • Theo van Veen
  • Anita Bruun
  • Berndt Ehinger
Article
Accepted:

Summary

The distribution of putative GABA-ergic neurons in the photosensory pineal organ of the rainbow trout was investigated by use of a specific antiserum against γ-aminobutyric acid (GABA). GABA-immunoreactive (GABA-IR) neurons were located in the rostral portion of the pineal end-vesicle, presumably constituting a population of interneurons. GABA-IR neurons were also found in the pineal stalk. The axons of these neurons were traced along the pineal stalk toward the brain. The terminal areas of these axons could not be established. GABA-IR glial cells were observed in the pineal end-vesicle, but not in the pineal stalk.

Key words

Pineal organ Gamma-amino butyric acid (GABA) Salmo gairdneri (Teleostei) 
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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Peter Ekström
    • 1
  • Theo van Veen
    • 1
  • Anita Bruun
    • 2
  • Berndt Ehinger
    • 2
  1. 1.Department of ZoologyUniversity of LundLundSweden
  2. 2.Department of OphthalmologyUniversity of LundLundSweden

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