Fig. 1. Diagram of an isolated locust thoracic ganglia preparation for intracellular recording from motoneurons. (A) The meso- (I) and meta- (II) thoracic ganglia with a flight muscle motoneuron. In this preparation, the motoneuron is stimulated extracellularly and recorded from intracellularly from the neuropil. (B) Sample trace of an action potential recorded from a motoneuron (Mn) at 25°C. Note the stimulus artefact preceding the action potential. (C) Sample trace of an action potential trace showing the parameters that were measured. Note the stimulus artefact preceding the action potential.