Abstract
The Drosophila antennal lobe represents the first processing stage for olfactory information. In contrast to previous views, Olsen et al. (this issue of Neuron ) demonstrate that antennal lobe output neurons show a broadened odor-tuning spectrum as compared to their sensory input. Likely candidates responsible for this broadening of odor tuning are recently identified excitatory local interneurons (Shang et al., February 9 issue of Cell ).
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