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Odor-evoked activity in the fly mushroom body. (a) A fly is glued to a cover glass with light curable resin. (b) Fluorescence and third-harmonic signals at different depths from the fly cuticle. (c) Peak olfactory response of the fly mushroom body. Pseudocolor images show ∆F/F measurement. (d) ∆F/F is plotted against time. Odor: isoamyl acetate at 5% saturated vapor pressure. Fly: OK107-GAL4, UAS-jRCaMP1b. Scale bar, 50 µm.
