Changes in rate of abdominal ventilatory pumping induced by warming individual ganglia in the male cricket Gryllus bimaculatus (de geer)

1. 1.|The brain (BR), suboesophageal ganglion (SOG), metathoracic ganglion mass (TG3) or fourth free abdominal ganglion (AG4) were selectively warmed from room temperature (23°C) to 3°C and the effects of elevated ganglion temperature on abdominal ventilatory pumping rate were observed.

2. 2.|Warming the SOG or BR almost always induced a strong increase in ventilatory pumping rate while warming TG3 or AG4 had no consistent effect, inducing about equally often a slight increase, decrease or no change.

3. 3.|It is concluded that the most temperature sensitive elements associated with the ventilatory rhythm generating system are localized within the head ganglia.

Author Keywords: Insect; Gryllus bimaculatus; abdominal ventilation; CNS thermosensitivity