Fig. 1.

Schematic diagram of the experimental design with the cricket central nervous system (CNS). Indicated is the site of the eserine injection into the brain, the mesothoracic wing-nerve recording (Meso Nv3A), the intracellular recording of neuron A3-AO in abdominal ganglion A3, the air current stimulation with a nozzle placed 20 mm behind the cerci, producing an air current from the back to the front of the animal, the A6 ganglion, and the terminal ganglion (TAG). Inset: schematic representation of a cricket calling song with 3 chirps composed of 4 sound pulses each and its putative corresponding wing-opener and wing-closer motoneuron activity in Nv3A. The opener-closer cycle refers to 1 sequence of opener-closer activity. The song parameters analyzed (sound pulse period, sound pulse duration, chirp period, chirp duration) are indicated.