Fig. 6.

Habituation beyond zero. Repeated bouts of stimulation (10 Hz) were given with 60 sec recovery intervals.Dots indicate stimuli, ticks indicate long-latency responses, arrowheads show fifth consecutive failure, and a bracket indicates a continuous bout carried to multiple lines in the plot. When habituation was prolonged well beyond the cessation of responses (bouts 5–7), subsequent recovery was reduced. Note also the transient increase in responsiveness after habituation in bouts 1, 5, and 6 (see text), and recovery produced by brief stimulus pauses near the end of bout 5.