Abstract

The analysis of antennal sweeps in intact crayfish (Procambarus clarkii) reveals that the animals are able to lateralize water vibration stimuli as well as to distinguish between different stimulus directions. The magnitude of sweeps of the ipsilateral antenna, which are usually directed backwards, is correlated with the angle between start position of the antenna and stimulus position. This dependence vanishes after obstructing information of tailfan mechanoreceptors by cutting the connective between the fifth and sixth abdominal ganglion.

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