[Mechanism of the constant representation of the position of a sound signal source by the cricket cercal system neurons]. / Issledovanie mekhanizma konstantnogo otobrazheniia polozheniia istochnika zvukovogo signala neironami tserkal'noi sistemy sverchka

Previously it has been shown that some abdominal giant neurones of the cricket have constant preffered directions of sound stimulation in relation not to the cerci (the organs bearing sound receptors) but to the insect body (fig. 1) [1]. Now it is found that the independence of directional sensitivity of giant neurones on the cerci position disappears after cutting all structures connecting the cerci to the body (except cercal nerves) (fig 2). Therefore the constancy of directional sensitivity of the giant nerones is provided by proprioceptive signals about cerci position.