Fig. 5. (A) Morphology of neurobiotin-stained projection neurones (PNs) reconstructed from 10µm frontal sections. Arborisations within the antennal lobe are uniglomerular. The targeted glomerulus was identified (using the reference in Fig. 1) and indicated by the number alongside. Axons of both neurones leave the antennal lobe through the inner antennocerebral tract. Protocerebral projections arborise within the calyces of the mushroom body (CMB) and then supply the lateral protocerebrum (LP). Broken lines indicate the borders of the CMB. Scale bar, 100µm. (B) Responses of the generalist neurone (number 112) to repeated stimulation by two compounds. Other stimuli had been tested in between. The thick horizontal bar indicates the time at which the compound was applied.