Voltage-dependent adaptation to phasic stimuli. (A) Responses to trains of α-function of graded amplitude in a Golgi cell. Bursts were reliably triggered only by the first α-function stimulus and burst latency was modulated by stimulus amplitude. (B) Plot of number of action potentials evoked by each current pulse in a train of eight pulses at −68 mV. The number of spikes in each response was normalized to the number of spikes evoked by the first pulse in each train. Mean ± SEM plotted for six repetitions of the same stimulus train. (Inset) Responses to a single train at −68 mV, illustrating burst adaptation. Responses to current pulses presented at −62 mV triggered single-spike responses that did not adapt.
