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We present a quantitative evaluation of Golgi-impregnated columnar neurons in the optic lobe of wild-type Drosophila melanogaster. This analysis reveals the overall connectivity pattern between the 10 neuropil layers of the medulla and demonstrates the existence of at least three major visual pathways. Pathway 1 connects medulla layer M10 to the lobula(More)
In stationary flight Drosophila melanogaster produces yaw torque in response to visual movement stimuli. The residual optomotor yaw torque response of the mutant optomotor-blindH31 (omb), which lacks the horizontal (HS) and vertical (VS) giant fibers in the lobula plate, differs from that of wild-type in several aspects: it is restricted to the frontal(More)
3H-2-deoxyglucose (2-DG) is used as a histological marker to study the spatial distribution of neuronal activity in the central brain of Drosophila melanogaster under controlled stimulus conditions. Tethered flies injected with the label are kept for 45-90 minutes in the center of a rotating drum carrying on its periphery a single black vertical stripe or a(More)
High-resolution 2-deoxyglucose (2-DG) neuronal activity labeling is used to identify a visual interneuron in Drosophila by its stimulus-specific uptake of [3H]2-DG during stationary flight in a well-characterized behavioral situation. With a single rotating stripe as visual stimulus a neuron is heavily labeled that has not been described in Drosophila(More)
The lateral accessory lobes (LALs) are prominent integration centers in the insect brain. In the desert locust Schistocerca gregaria, they are connected with the anterior optic tubercles (AOTus), with the central complex, and with the ventral nerve cord. Two subcompartments of the LALs, the lateral triangle and the median olive, are easily recognized by(More)
The distribution of odor-evoked neuronal activity in the antennal lobes of the blowfly Calliphora vicina has been studied by means of [3H] 2-deoxyglucose (2-DG) uptake. Stimulation with natural attractants like meat or cheese induced uptake of 2-DG in a large number of glomeruli, stimulation with the single odorant butyric acid only in a small number of(More)
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