"Sand scorpions and many other arachnids locate their prey through highly sensitive slit sensilla at the tips (tarsi) of their eight legs. This sensor array responds to vibrations with stimulus-locked action potentials encoding the target direction. We present a neuronal model to account for stimulus angle determination using a population of second-order neurons, each receiving excitatory input from one tarsus and inhibition from a triad opposite to it. ..."
Stürzl W, Kempter R, van Hemmen JL (2000) Theory of arachnid prey localization. Phys Rev Lett 84:5668-71 [PubMed]