GABA-immunoreactive neurons in the photosensory pineal organ of the rainbow trout: two distinct neuronal populations |
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Authors: | Peter Ekström Theo van Veen Anita Bruun Berndt Ehinger |
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Affiliation: | (1) Department of Zoology, University of Lund, Lund, Sweden;(2) Department of Ophthalmology, University of Lund, Lund, Sweden;(3) Department of Zoology, University of Lund, Helgonavägen 3, S-223 62 Lund, Sweden |
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Abstract: | 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 -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. |
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Keywords: | Pineal organ Gamma-amino butyric acid (GABA) Salmo gairdneri (Teleostei) |
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