Figure 6.

Transient and sustained ranking. Neurons were divided into transient and sustained response subgroups by normalizing the response of each neuron to the interval 50–150 ms and then ranking the neurons by the sustained activation in the interval 150–250 ms after stimulus onset. Neurons with high rank order had high late sustained activity as compared with the earlier transient response activity. The 108 neurons were ranked and divided into two equal groups: a transient group indicated by small filled circles and a sustained group indicated by open circles. The rank positions of the neurons depicted in Figure 5 (KAQ, KAG, KBI) are marked by triangles.