To acquire information about the spatial distribution of an odorant, animals may rely on bilateral olfactory organs and compare side differences of odor intensity and timing [1-6], or may perform
spatial and temporal signal integration of subsequent samplings [7]. The American cockroach
can efficiently locate a source of sex pheromone even after the removal of one antenna,
suggesting that bilateral comparison is not a prerequisite for odor localization in this species [8,
9]. Cognate olfactory sensory neurons (OSNs) originating from different locations on the
flagellum, but bearing the same olfactory receptor, converge onto the same glomerulus within
the antennal lobe, which is thought to result in a loss of spatial information