[1-6] and temporal signal integration of subsequent samplings [7]. The American cockroach is equipped with relatively long antennae (40-50 mm) covered by roughly 200,000 olfactory receptor neurons (ORNs), giving a wide working range for odor detection. However, the question whether ORNs transmit spatial information of odor landscapes along a single antenna is still open. In principle, all ORNs  bearing the same olfactory receptor (OR) along the flagellum converge on the same glomerulus within the antennal lobe (the first olfactory processing centre, analogous to the mammalian olfactory bulb)(Figure \ref{div-511309}a-a”’). Hence such information about stimulus’ location along an antenna may be lost. 
Behavioral studies had shown that cockroaches can efficiently locate a source of the female sex pheromone also after the removal of one antenna, suggesting that bilateral comparison is not a prerequisite for pheromone localization [8,9]. In addition, recent studies had shown that  pheromone-responsive ORNs terminate in the macroglomerulus of the antennal lobe with an antennotopic organization, innervating multiple projection neurons in the antennal lobe that maintain spatially distinct and partially overlapping receptive fields along the antenna.