Serotonin-like immunoreactivity in the optic lobes of three insect species |
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Authors: | Dr. Dick R. Nässel Nikolai Klemm |
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Affiliation: | 1. Department of Zoology, University of Lund, Lund, Sweden 2. Fakult?t für Biologie, Universit?t Konstanz, Konstanz, Bundesrepublik Deutschland
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Abstract: | The cellular localization of 5-HT in the optic lobes of three insect species was assayed with the use of antibodies raised against 5-HT. In Schistocerca, Periplaneta, and Calliphora all neuropil regions of the optic lobe, the lamina, medulla and lobula, contain 5-HT-immunoreactive varicose fibres in different patterns, like columns and layers. Such fibres also connect the lobula to neuropil in the lateral protocerebrum. In Calliphora also 5-HT-positive fibres of the medulla and lobula plate have projections to the lateral protocerebrum, whereas the origin of the lamina fibres is not certain. In all species the processes displaying 5-HT-like immunoreactivity appear to be derived from a relatively small number of cell bodies, each neuron thus having processes over a large volume of the neuropil of the optic lobe in different layers. |
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