[Pathways for the transmission of visual information in the protocerebrum of the drone fly Eristalis tenax].
Studies have been made on the structure of neuropiles and visual pathoways in the brain of the fly E. tenax L. (Diptera, Syrphidae). The retina is projected on laminar structures in the visual ganglia only; other protocerebrum neuropiles lack this projection. All the comissures connecting contralateral visual ganglia, consist of several hundreds of fibers, whereas the binocular zone of both eyes includes more than 4,000 ommatidia. Neither the visual ganglia, nor other protocerebrum neuropiles may serve as a substrate for topographic imposition of projections of the corresponding parts in both retines. The mechanism of binocular interaction in insects presumably differs from that in mammals (primates, carnovores).
D000818:Animals; D004175:Diptera / Q000502:physiology*; D005724:Ganglia / Q000502:physiology; D009420:Nervous System / Q000033:anatomy & histology; D009424:Nervous System Physiological Phenomena; D014785:Vision, Ocular
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