Figure 4.

Percentage of neurons in the MGm and SG that were nonresponsive or exhibited significant increases in activity during unpaired pretraining. Neurons with significantly increased activity during only the first and/or second 200 ms intervals of the 400 ms tone conditioned stimulus period were classified as short latency. Neurons with significantly increased activity only during the third and/or forth 100 ms intervals were classified as long latency. Neurons that fit into both categories were classified as sustained.