...Peter J. Simmons; Rob R. de Ruyter van Steveninck SUMMARY We investigate coding in a locust brain neuron, DNI, which transforms graded synaptic input from ocellar L-neurons into axonal spikes that travel to excite particular thoracic flight neurons. Ocellar neurons are naturally stimulated...

... currents causes an increase in input resistance. Larger hyperpolarising currents cause oscillations in the membrane potential. The amplitude of the oscillations increases with current strength. Repolarisation generates brief rebound spikes of variable amplitude. Injection of small hyperpolarising currents...

.... The inhibitory postsynaptic potential (IPSP) at a connection between two L-neurones was examined by producing in the presynaptic neurone either a spike ( Fig. 1A ) or a more long-lasting depolarization ( Fig. 1B ). A spike was produced by switching off a hyperpolarizing current and lasted 4 ms, measured between...