Summary
The distribution of gamma-aminobutyric acid (GABA) immunoreactivity was studied in the forebrain (tel-and diencephalon) of the goldfish by means of immunocytochemistry on Vibratome sections using antibodies against GABA. Positive perikarya were detected in the olfactory bulbs and in all divisions of the telencephalon, the highest density being found along the midline. In the diencephalon, GABA-containing cell bodies were found in the hypothalamus, in particular in the preoptic and tuberal regions. The inferior lobes, the nucleus recessus lateralis, and more laterodorsal regions, such as the nucleus glomerulosus and surrounding structures, also exhibited numerous GABA-positive perikarya. Cell bodies were also noted in the thalamus, in particular in the dorsomedial, dorsolateral and ventromedial nuclei. The relative density of immunoreactive fibers was evaluated for each brain nucleus and classified into five categories. This ubiquitous distribution indicates that, as in higher vertebrates, GABA most probably represents one of the major neurotransmitters in the brain of teleosts.
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Martinoli, MG., Dubourg, P., Geffard, M. et al. Distribution of GABA-immunoreactive neurons in the forebrain of the goldfish, Carassius auratus . Cell Tissue Res 260, 77–84 (1990). https://doi.org/10.1007/BF00297492
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DOI: https://doi.org/10.1007/BF00297492