Serotonin-like immunoreactivity in the optic lobes of three insect species.
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.
D000818:Animals; D006651:Histocytochemistry; D007158:Immunologic Techniques; D007313:Insecta / Q000378:metabolism*; D009899:Optic Lobe, Nonmammalian / Q000378:metabolism*; D012701:Serotonin / Q000378:metabolism*; D013045:Species Specificity
D012701:Serotonin