Figure 2.

Effect of stimulus repetition rate on neurons with different amounts of adaptation, using the oddball paradigm. A, In a nonadapting neuron, the responses to the standard (blue traces) and oddball (red traces) stimuli are similar regardless of the repetition rate (2 Hz, top row; 4 Hz, middle row; 8 Hz, bottom row). B, Partially adapting neurons responded better to the oddball at the higher repetition rates. C, Novelty neurons responded much more strongly to the oddball than to the standard at all repetition rates tested. In all neurons that showed SSA, the response to the 50% probability condition was always smaller than that to oddball but larger than to the standard.