The diagram of the preparation for recording the prothoracic neurons activity. Electr. - glass microelectrode; CxI, CxII, CxIII - prothoracic, mesothoracic and metathoracic coxae, correspondingly; Tymp - tympanic organ; Ce - head; tg1 - prothoracic ganglion; ptg - pterothoracic ganglia.